1
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Gutheil C, Roß G, Amirjalayer S, Mo B, Schäfer AH, Doltsinis NL, Braunschweig B, Glorius F. Tailored Monolayers of N-Heterocyclic Carbenes by Kinetic Control. ACS Nano 2024; 18:3043-3052. [PMID: 38252154 DOI: 10.1021/acsnano.3c08045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Despite the substantial success of N-heterocyclic carbenes (NHCs) as stable and versatile surface modification ligands, their use in nanoscale applications beyond chemistry is still hampered by the failure to control the carbene binding mode, which complicates the fabrication of monolayers with the desired physicochemical properties. Here, we applied vibrational sum-frequency generation spectroscopy to conduct a pseudokinetic surface analysis of NHC monolayers on Au thin films under ambient conditions. We observe for two frequently used carbene structures that their binding mode is highly dynamic and changes with the adsorption time. In addition, we demonstrate that this transition can be accelerated or decelerated to adjust the binding mode of NHCs, which allows fabrication of tailored monolayers of NHCs simply by kinetic control.
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Affiliation(s)
- Christian Gutheil
- Organisch-Chemisches Institut, University of Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Gina Roß
- Institut für Physikalische Chemie, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Saeed Amirjalayer
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation, University of Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Boris Mo
- Institut für Pharmazeutische Biologie und Phytochemie, University of Münster, Corrensstraße 48, 48149 Münster, Germany
| | | | - Nikos L Doltsinis
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation, University of Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Björn Braunschweig
- Institut für Physikalische Chemie, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, University of Münster, Corrensstraße 36, 48149 Münster, Germany
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2
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Singh P, Kundu K, Seçkin S, Bhardwaj K, König TAF, Jaiswal A. The Rise of Structurally Anisotropic Plasmonic Janus Gold Nanostars. Chemistry 2023; 29:e202302100. [PMID: 37461223 DOI: 10.1002/chem.202302100] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Indexed: 09/12/2023]
Abstract
Nanostructures intrinsically possessing two different structural or functional features, often called Janus nanoparticles, are emerging as a potential material for sensing, catalysis, and biomedical applications. Herein, we report the synthesis of plasmonic gold Janus nanostars (NSs) possessing a smooth concave pentagonal morphology with sharp tips and edges on one side and, contrastingly, a crumbled morphology on the other. The methodology reported herein for their synthesis - a single-step growth reaction - is different from any other Janus nanoparticle preparation involving either template-assisted growth or a masking technique. Interestingly, the coexistence of lower- and higher-index facets was found in these Janus NSs. The general paradigm for synthesizing gold Janus NSs was investigated by understanding the kinetic control mechanism with the combinatorial effect of all the reagents responsible for the structure. The optical properties of the Janus NSs were realized by corelating their extinction spectra with the simulated data. The size-dependent surface-enhanced Raman scattering (SERS) activity of these Janus NSs was studied with 1,4-BDT as the model analyte. Finite-difference time-domain simulations for differently sized particles revealed the distribution of electromagnetic hot-spots over the particles resulting in enhancement of the SERS signal in a size-dependent manner.
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Affiliation(s)
- Prem Singh
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh, 175075, India
| | - Koustav Kundu
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh, 175075, India
| | - Sezer Seçkin
- Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe Straße 6, 01069, Dresden, Germany
| | - Keshav Bhardwaj
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh, 175075, India
| | - Tobias A F König
- Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe Straße 6, 01069, Dresden, Germany
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, Helmholtzstraße 18, 01062, Dresden, Germany
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Amit Jaiswal
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh, 175075, India
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3
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Liu M, Zhou S, Choi SI, Xia Y. Deterministic Synthesis of Pd Nanocrystals Enclosed by High-Index Facets and Their Enhanced Activity toward Formic Acid Oxidation. Precis Chem 2023; 1:372-381. [PMID: 37654808 PMCID: PMC10467563 DOI: 10.1021/prechem.3c00060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 09/02/2023]
Abstract
Noble-metal nanocrystals enclosed by high-index facets are of growing interest due to their enhanced catalytic performance in a variety of reactions. Herein, we report the deterministic synthesis of Pd nanocrystals encased by high-index facets by controlling the rate of deposition (Vdeposition) relative to that of surface diffusion (Vdiffusion). For octahedral seeds with truncated corners, a reduction rate (and thus deposition rate) faster than that of surface diffusion (i.e., Vdeposition/Vdiffusion > 1) led to the formation of concave trisoctahedra (TOH) with high-index facets. When the reduction was slowed down, in contrast, surface diffusion dominated the growth pathway. In the case of Vdeposition/Vdiffusion ≈ 1, truncated octahedra with enlarged sizes were produced. When the reduction rate was between these two extremes, we obtained concave tetrahexahedra (THH) without or with truncation. Similar growth patterns were also observed for the cuboctahedral seeds. When the Pd octahedra, concave TOH, and concave THH were tested for electrocatalyzing the formic acid oxidation (FAO) reaction, those with high-index facets were advantageous over the conventional Pd octahedra enclosed by {111} facets. This work not only contributes to the understanding of surface diffusion and its role in nanocrystal growth but also offers a general protocol for the synthesis of nanocrystals enclosed by high-index facets.
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Affiliation(s)
- Maochang Liu
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
- International
Research Center for Renewable Energy, State Key Laboratory of Multiphase
Flow, Xi’an Jiaotong University, Xi’an, Shanxi 710049, P. R. China
| | - Siyu Zhou
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Sang-Il Choi
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Younan Xia
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332, United States
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4
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Oh JS, Kim KY, Kim M, Kim S, Jung SH, Jung JH. Chiral Supramolecular Multiblock Copolymerization Accompanying Chirality Transfer in Heterostructures via Living Chain Growth. Angew Chem Int Ed Engl 2023:e202300913. [PMID: 36894500 DOI: 10.1002/anie.202300913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/23/2023] [Accepted: 03/09/2023] [Indexed: 03/11/2023]
Abstract
We report the unique synthesis of chiral supramolecular tri- and penta-BCPs with controllable chirality using kinetically adjusted seeded supramolecular copolymerization in THF and DMSO (99:1, v/v). Tetraphenylethylene (D- and L-TPE) derivatives bearing D- and L-alanine side chains formed thermodynamically favored chiral products via a kinetically trapped in monomeric state with a long lag phase. In contrast, achiral TPE-G containing glycine moieties did not form a supramolecular polymer owing to the energy barrier in its kinetically trapped state. We show that the copolymerization of the metastable states of TPE-G not only enables the generation of supramolecular BCPs by the seeded living growth method, but also transfers chirality at the seed ends. This research demonstrates the generation of chiral supramolecular tri- and penta-BCPs with B-A-B, A-B-A-B-A, and C-B-A-B-C block patterns accompanying chirality transfer via seeded living polymerization.
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Affiliation(s)
- Jeong Sang Oh
- Gyeongsang National University, Department of Chemistry, KOREA, REPUBLIC OF
| | - Ka Young Kim
- Gyeongsang National University, Department of Chemistry, KOREA, REPUBLIC OF
| | - Minhye Kim
- Gyeongsang National University, Department of Chemistry, KOREA, REPUBLIC OF
| | - Sukyoung Kim
- Gyeongsang National University, Department of Chemistry, KOREA, REPUBLIC OF
| | - Sung Ho Jung
- Gyeongsang National University, Department of Chemistry, KOREA, REPUBLIC OF
| | - Jong Hwa Jung
- Gyeongsang National University, Department of Chemistry, Gyeongsang National University 501 jinjudaero, 52828, Jinju, KOREA, REPUBLIC OF
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5
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Bognar S, van Gemmeren M. A Modular Olefination of Aldehydes with Thiols as Coupling Partners. Chemistry 2023; 29:e202203512. [PMID: 36455150 DOI: 10.1002/chem.202203512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/03/2022]
Abstract
Olefins range amongst the most important motifs in organic chemistry. Hence, the development of novel olefin syntheses has remained a constant field of research in synthetic chemistry to date. Herein, we report the development of a modular olefination that converts aldehydes into olefins with thiols as reaction partners. The simple, transition metal-free protocol proceeds via an unsymmetrical bissulfone intermediate which is converted into the respective alkene in a Ramberg-Bäcklund-type process. Differently substituted olefins can be synthesized from readily available starting materials in typically good yields and stereoselectivities using basic laboratory chemicals exclusively. Complementary reaction conditions differing in the choice of solvent favor the E/Z-products respectively under kinetic control rendering this protocol an interesting economical addition to the family of olefin syntheses.
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Affiliation(s)
- Sabine Bognar
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149, Münster, Germany
| | - Manuel van Gemmeren
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149, Münster, Germany.,Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Otto-Hahn-Platz 4, 24118, Kiel, Germany
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6
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Xu G, Li M, Wang Q, Feng F, Lou Q, Hou Y, Hui J, Zhang P, Wang L, Yao L, Qin S, Ouyang X, Wu D, Ling D, Wang X. A Dual- Kinetic Control Strategy for Designing Nano-Metamaterials: Novel Class of Metamaterials with Both Characteristic and Whole Sizes of Nanoscale. Adv Sci (Weinh) 2023; 10:e2205595. [PMID: 36377475 PMCID: PMC9896071 DOI: 10.1002/advs.202205595] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Increasingly intricate in their multilevel multiscale microarchitecture, metamaterials with unique physical properties are challenging the inherent constraints of natural materials. Their applicability in the nanomedicine field still suffers because nanomedicine requires a maximum size of tens to hundreds of nanometers; however, this size scale has not been achieved in metamaterials. Therefore, "nano-metamaterials," a novel class of metamaterials, are introduced, which are rationally designed materials with multilevel microarchitectures and both characteristic sizes and whole sizes at the nanoscale, investing in themselves remarkably unique and significantly enhanced material properties as compared with conventional nanomaterials. Microarchitectural regulation through conventional thermodynamic strategy is limited since the thermodynamic process relies on the frequency-dependent effective temperature, Teff (ω), which limits the architectural regulation freedom degree. Here, a novel dual-kinetic control strategy is designed to fabricate nano-metamaterials by freezing a high-free energy state in a Teff (ω)-constant system, where two independent dynamic processes, non-solvent induced block copolymer (BCP) self-assembly and osmotically driven self-emulsification, are regulated simultaneously. Fe3+ -"onion-like core@porous corona" (Fe3+ -OCPCs) nanoparticles (the products) have not only architectural complexity, porous corona and an onion-like core but also compositional complexity, Fe3+ chelating BCP assemblies. Furthermore, by using Fe3+ -OCPCs as a model material, a microstructure-biological performance relationship is manifested in nano-metamaterials.
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Affiliation(s)
- Guanhua Xu
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Mengmeng Li
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Qiyue Wang
- Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringNational Center for Translational MedicineShanghai Jiao Tong UniversityShanghai200240P. R. China
| | - Feng Feng
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Qi Lou
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Yi Hou
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Junfeng Hui
- Shaanxi Key Laboratory of Degradable Biomedical MaterialsSchool of Chemical EngineeringNorthwest UniversityXi'anShaanxi710069P. R. China
| | - Peisen Zhang
- College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Li Wang
- Beijing National Laboratory for Molecular SciencesState Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesInstitute of Chemistry Chinese Academy of ScienceBeijing100190P. R. China
| | - Li Yao
- Beijing National Laboratory for Molecular SciencesState Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesInstitute of Chemistry Chinese Academy of ScienceBeijing100190P. R. China
- School of Chemistry and Chemical EngineeringUniversity of Chinese Academy of ScienceBeijing100049P. R. China
| | - Shijie Qin
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Xiaoping Ouyang
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Dazhuan Wu
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Daishun Ling
- Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringNational Center for Translational MedicineShanghai Jiao Tong UniversityShanghai200240P. R. China
| | - Xiuyu Wang
- Institute of Process EquipmentCollege of Energy EngineeringZhejiang UniversityHangzhou310027P. R. China
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7
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Shen H, Tang X, Wu Q, Zhang Y, Ma C, Xu Z, Teo BK, Zheng N. Guiding the High-Yield Synthesis of NHC-Ligated Gold Nanoclusters by 19F NMR Spectroscopy. ACS Nanosci Au 2022; 2:520-526. [PMID: 37101850 PMCID: PMC10125265 DOI: 10.1021/acsnanoscienceau.2c00026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 04/28/2023]
Abstract
Optimizing the synthesis of atomically precise metal nanoclusters by virtue of molecular tools is highly desirable but quite challenging. Herein we report how 19F NMR spectroscopy can be used to guide the high-yield synthesis of N-heterocyclic carbene (NHC)-stabilized gold nanoclusters. In spite of little difference, 19F NMR signals of fluoro-incorporated NHCs (FNHC) are highly sensitive to the tiny change in their surrounding chemical environments with different N-substituents, metals, or anions, thus providing a convenient strategy to discriminate species in reaction mixtures. By using 19F NMR, we first disclosed that the one-pot reduction of FNHC-Au-X (X is halide) yields multiple compounds, including cluster compounds and also a large amount of highly stable [Au(FNHC)2]+ byproduct. The detailed quantitative 19F NMR analyses over the reductive synthesis of NHC-stabilized Au nanoclusters reveal that the formation of the di-NHC complex is deleterious to the high-yield synthesis of NHC-stabilized Au nanoclusters. With the understanding, the reaction kinetic was then slowed by controlling the reduction rate to achieve the high yield of a [Au24(FNHC)14X2H3]3+ nanocluster with a unique structure. The strategy demonstrated in this work is expected to provide an effective tool to guide the high-yield synthesis of organic ligand-stabilized metal nanoclusters.
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Affiliation(s)
- Hui Shen
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiongkai Tang
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qingyuan Wu
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yuhao Zhang
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chuxin Ma
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhen Xu
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Boon K. Teo
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Nanfeng Zheng
- State
Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, and National
& Local Joint Engineering Research Center for Preparation Technology
of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Innovation
Laboratory for Sciences and Technologies of Energy Materials of Fujian
Province (IKKEM), Xiamen 361005, China
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8
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Wen JR, Rodríguez Ortiz FA, Champ A, Sheldon MT. Kinetic Control for Continuously Tunable Lattice Parameters, Size, and Composition during CsPbX 3 (X = Cl, Br, I) Nanorod Synthesis. ACS Nano 2022; 16:8318-8328. [PMID: 35544608 DOI: 10.1021/acsnano.2c02474] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The fast kinetics of all-inorganic CsPbX3 (X = Cl, Br, or I) nanocrystal growth entail that many synthetic strategies for structural control established in other semiconductor systems do not apply. Rather, products are often determined by thermodynamic factors, limiting the range of synthetic outcomes and functionality. In this study, we show how reaction kinetics are significantly slowed if nanocrystals are prepared using a dual injection strategy that moderates the crucial interaction between cesium and halide during nucleation and growth. The result is highly uniform nanorod or cuboid nanocrystals with a controllable size and aspect ratio across the quantum confinement regime, obtainable for both pure and mixed halide compositions. Further, the crystal lattice is continuously tunable between the tetragonal (I4/mcm) and orthorhombic (Pbnm) phases, independent of the overall nanorod morphology, enabling significantly more sophisticated structure-property relationships that can be tailored during this kinetically controlled synthesis.
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Affiliation(s)
- Je-Ruei Wen
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | | | - Anna Champ
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Matthew T Sheldon
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843-3255, United States
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9
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Qiu J, Nguyen QN, Lyu Z, Wang Q, Xia Y. Bimetallic Janus Nanocrystals: Syntheses and Applications. Adv Mater 2022; 34:e2102591. [PMID: 34648198 DOI: 10.1002/adma.202102591] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 09/15/2021] [Indexed: 05/28/2023]
Abstract
Bimetallic Janus nanocrystals have received considerable interest in recent years owing to their unique properties and niche applications. The side-by-side distribution of two distinct metals provides a flexible platform for tailoring the optical and catalytic properties of nanocrystals. First, a brief introduction to the structural features of bimetallic Janus nanocrystals, followed by an extensive discussion of the synthetic approaches, is given. The strategies and experimental controls for achieving the Janus structure, as well as the mechanistic understandings, are specifically discussed. Then, a number of intriguing properties and applications enabled by the Janus nanocrystals are highlighted. Finally, this article is concluded with future directions and outlooks with respect to both syntheses and applications of this new class of functional nanomaterials.
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Affiliation(s)
- Jichuan Qiu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Quynh N Nguyen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Zhiheng Lyu
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Qiuxiang Wang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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10
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Liu J, Wang G, Wang X, Sun Y, Zhou B, Zou Y, Wang B, Zhang K. Manipulation of Organic Afterglow by Thermodynamic and Kinetic Control. Chemistry 2021; 27:16735-16743. [PMID: 34643972 DOI: 10.1002/chem.202103020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Indexed: 11/07/2022]
Abstract
The fabrication of room-temperature organic phosphorescence and afterglow materials, as well as the transformation of their photophysical properties, has emerged as an important topic in the research field of luminescent materials. Here, we report the establishment of energy landscapes in dopant-matrix organic afterglow systems where the aggregation states of luminescent dopants can be controlled by doping concentrations in the matrices and the methods of preparing the materials. Through manipulation by thermodynamic and kinetic control, dopant-matrix afterglow materials with different aggregation states and diverse afterglow properties can be obtained. The conversion from metastable aggregation state to thermodynamic stable aggregation state of the dopant-matrix afterglow materials to leads to the emergence of intriguing afterglow transformation behavior triggered by thermal and solvent annealing. The thermodynamically unfavorable reversible afterglow transformation process can also be achieved by coupling the dopant-matrix afterglow system to mechanical forces.
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Affiliation(s)
- Jiahui Liu
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China.,Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Guangming Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Xuepu Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Yan Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Bei Zhou
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Yunlong Zou
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Biaobing Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Kaka Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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11
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Abstract
Supramolecular hydrogels are useful in many areas such as cell culturing, catalysis, sensing, tissue engineering, drug delivery, environmental remediation and optoelectronics. The gels need specific properties for each application. The properties arise from a fibrous network that forms the matrix. A common method to prepare hydrogels is to use a pH change. Most methods result in a sudden pH jump and often lead to gels that are hard to reproduce and control. The urease-urea reaction can be used to control hydrogel properties by a uniform and controlled pH increase as well as to set up pH cycles. The reaction involves hydrolysis of urea by urease and production of ammonia which increases the pH. The rate of ammonia production can be controlled which can be used to prepare gels with differing properties. Herein, we show how the urease-urea reaction can be used for the construction of next generation functional materials.
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Affiliation(s)
- Santanu Panja
- School of ChemistryUniversity of GlasgowGlasgowG12 8QQUK
| | - Dave J. Adams
- School of ChemistryUniversity of GlasgowGlasgowG12 8QQUK
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12
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Abstract
The spontaneous alignment of self-assembled chiral nanostructures at macroscopic scales is appealing because of their unique structural features and physicochemical properties. Here we present the construction of highly ordered bioorganometallic nanohelical arrays on the basis of the hierarchical chiral self-assembly of the simple ferrocenyl l-phenylalanine (Fc-l-F). The formation of nanohelical arrays is under kinetic control, which can be controlled by changing the growth time and the vapor temperature. The chiral nanoarrays can generate circularly polarized luminescence by the incorporation of fluorescent dyes. Moreover, due to the redox activity of the Fc moiety, the nanohelical arrays show enhanced electrical capacity compared with previously reported peptide nanomaterials. The results shed light on the highly ordered chiral self-assembled nanomaterials, which have potential applications in fields of optics, sensing, and energy storage.
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Affiliation(s)
- Jiahui Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Qing Li
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Liuping Hu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Yuefei Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China.,Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, People's Republic of China.,Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, People's Republic of China.,Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Zhimin He
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
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13
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Zhu BC, He J, Liu W, Xia XY, Liu LY, Liang BB, Yao HG, Liu B, Ji LN, Mao ZW. Selectivity and Targeting of G-Quadruplex Binders Activated by Adaptive Binding and Controlled by Chemical Kinetics. Angew Chem Int Ed Engl 2021; 60:15340-15343. [PMID: 33899272 DOI: 10.1002/anie.202104624] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/22/2022]
Abstract
G-quadruplexes (G4s) are prevalent in oncogenes and are potential antitumor drug targets. However, binding selectivity of compounds to G4s still faces challenges. Herein, we report a platinum(II) complex (Pt1), whose affinity to G4-DNA is activated by adaptive binding and selectivity controlled by binding kinetics. The resolved structure of Pt1/VEGF-G4 (a promoter G4) shows that Pt1 matches 3'-G-tetrad of VEGF-G4 through Cl- -dissociation and loop rearrangement of VEGF-G4. Binding rate constants are determined by coordination bond breakage/formation, correlating fully with affinities. The selective rate-determining binding step, Cl- -dissociation upon G4-binding, is 2-3 orders of magnitude higher than dsDNA. Pt1 potently targets G4 in living cells, effectively represses VEGF expression, and inhibits vascular growth in zebrafish. We show adaptive G4-binding activation and controlled by kinetics, providing a complementary design principle for compounds targeting G4 or similar biomolecules.
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Affiliation(s)
- Bo-Chen Zhu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Juan He
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China.,School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Changmingshui Avenue 9-13, 528458, Zhongshan, China
| | - Wenting Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Xiao-Yu Xia
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Liu-Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Bing-Bing Liang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Hua-Gang Yao
- School of Pharmaceutical and Chemical Engineering, Guangdong Pharmaceutical University, Changmingshui Avenue 9-13, 528458, Zhongshan, China
| | - Bing Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Liang-Nian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, No. 135, Xingang Xi Road, 510275, Guangzhou, China
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14
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Lin JT, Chen DG, Wu CH, Hsu CS, Chien CY, Chen HM, Chou PT, Chiu CW. A Universal Approach for Controllable Synthesis of n-Specific Layered 2D Perovskite Nanoplates. Angew Chem Int Ed Engl 2021; 60:7866-7872. [PMID: 33403749 DOI: 10.1002/anie.202016140] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 12/23/2020] [Indexed: 11/10/2022]
Abstract
2D perovskites with chemical formula A'2 An-1 Bn X3n+1 have recently attracted considerable attention due to their tunable optical and electronic properties, which can be attained by varying the chemical composition. While high color-purity emitting perovskite nanomaterials have been accomplished through changing the halide composition, the preparation of single-phase, specific n-layer 2D perovskite nanomaterials is still pending because of the fast nucleation process of nanoparticles. We demonstrate a facile, rational and efficacious approach to synthesizing single-phase 2D perovskite nanoplates with a designated n number for both lead- and tin-based perovskites through kinetic control. Casting carboxylic acid additives in the reaction medium promotes selective formation of the kinetic product-multilayer 2D perovskite-in preference to the single-layer thermodynamic product. For the n-specific layered 2D perovskites, decreasing the number of octahedral layers per inorganic sheet leads to an increase of photoluminescence energy, radiative decay rate, and a significant boost in photostability.
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Affiliation(s)
- Jin-Tai Lin
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Deng-Gao Chen
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Cheng-Ham Wu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Chia-Shuo Hsu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Chia-Ying Chien
- Instrumentation Center, National Taiwan University, Taipei, 10617, Taiwan
| | - Hao-Ming Chen
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.,Center for Emerging Materials and Advanced Devices, National Taiwan University, Taipei, 10617, Taiwan
| | - Ching-Wen Chiu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
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15
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Long MJC, Wang L, Aye Y. Getting the Right Grip? How Understanding Electrophile Selectivity Profiles Could Illuminate Our Understanding of Redox Signaling. Antioxid Redox Signal 2020; 33:1077-1091. [PMID: 31578876 PMCID: PMC7583342 DOI: 10.1089/ars.2019.7894] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Significance: Electrophile signaling is coming into focus as a bona fide cell signaling mechanism. The electrophilic regulation occurs typically through a sensing event (i.e., labeling of a protein) and a signaling event (the labeling event having an effect of the proteins activity, association, etc.). Recent Advances: Herein, we focus on the first step of this process, electrophile sensing. Electrophile sensing is typically a deceptively simple reaction between the thiol of a protein cysteine, of which there are around 200,000 in the human proteome, and a Michael acceptor, of which there are numerous flavors, including enals and enones. Recent data overall paint a picture that despite being a simple chemical reaction, electrophile sensing is a discerning process, showing labeling preferences that are often not in line with reactivity of the electrophile. Critical Issues: With a view to trying to decide what brings about highly electrophile-reactive protein cysteines, and how reactive these sensors may be, we discuss aspects of the thermodynamics and kinetics of covalent/noncovalent binding. Data made available by several laboratories indicate that it is likely that specific proteins exhibit highly stereo- and chemoselective electrophile sensing, which we take as good evidence for recognition between the electrophile and the protein before forming a covalent bond. Future Directions: We propose experiments that could help us gain a better and more quantitative understanding of the mechanisms through which sensing comes about. We further extoll the importance of performing more detailed experiments on labeling and trying to standardize the way we assess protein-specific electrophile sensing.
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Affiliation(s)
- Marcus J C Long
- 47 Pudding Gate, Bishop Burton, Beverley East Riding of Yorkshire, United Kingdom
| | - Lingxi Wang
- Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
| | - Yimon Aye
- Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
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16
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Marsden SR, McMillan DGG, Hanefeld U. Assessing the Thiamine Diphosphate Dependent Pyruvate Dehydrogenase E1 Subunit for Carboligation Reactions with Aliphatic Ketoacids. Int J Mol Sci 2020; 21:ijms21228641. [PMID: 33207817 PMCID: PMC7696235 DOI: 10.3390/ijms21228641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/12/2020] [Accepted: 11/12/2020] [Indexed: 12/31/2022] Open
Abstract
The synthetic properties of the Thiamine diphosphate (ThDP)-dependent pyruvate dehydrogenase E1 subunit from Escherichia coli (EcPDH E1) was assessed for carboligation reactions with aliphatic ketoacids. Due to its role in metabolism, EcPDH E1 was previously characterised with respect to its biochemical properties, but it was never applied for synthetic purposes. Here, we show that EcPDH E1 is a promising biocatalyst for the production of chiral α-hydroxyketones. WT EcPDH E1 shows a 180-250-fold higher catalytic efficiency towards 2-oxobutyrate or pyruvate, respectively, in comparison to engineered transketolase variants from Geobacillus stearothermophilus (TKGST). Its broad active site cleft allows for the efficient conversion of both (R)- and (S)-configured α-hydroxyaldehydes, next to linear and branched aliphatic aldehydes as acceptor substrates under kinetically controlled conditions. The alternate, thermodynamically controlled self-reaction of aliphatic aldehydes was shown to be limited to low levels of conversion, which we propose to be due to their large hydration constants. Additionally, the thermodynamically controlled approach was demonstrated to suffer from a loss of stereoselectivity, which makes it unfeasible for aliphatic substrates.
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17
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Tran B, Pichling P, Tenney L, Connelly CM, Moon MH, Ferré-D'Amaré AR, Schneekloth JS Jr, Jones CP. Parallel Discovery Strategies Provide a Basis for Riboswitch Ligand Design. Cell Chem Biol 2020; 27:1241-1249.e4. [PMID: 32795418 DOI: 10.1016/j.chembiol.2020.07.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/06/2020] [Accepted: 07/23/2020] [Indexed: 01/06/2023]
Abstract
Riboswitches are mRNA domains that make gene-regulatory decisions upon binding their cognate ligands. Bacterial riboswitches that specifically recognize 5-aminoimidazole-4-carboxamide riboside 5'-monophosphate (ZMP) and 5'-triphosphate (ZTP) regulate genes involved in folate and purine metabolism. Now, we have developed synthetic ligands targeting ZTP riboswitches by replacing the sugar-phosphate moiety of ZMP with various functional groups, including simple heterocycles. Despite losing hydrogen bonds from ZMP, these analogs bind ZTP riboswitches with similar affinities as the natural ligand, and activate transcription more strongly than ZMP in vitro. The most active ligand stimulates gene expression ∼3 times more than ZMP in a live Escherichia coli reporter. Co-crystal structures of the Fusobacterium ulcerans ZTP riboswitch bound to synthetic ligands suggest stacking of their pyridine moieties on a conserved RNA nucleobase primarily determines their higher activity. Altogether, these findings guide future design of improved riboswitch activators and yield insights into how RNA-targeted ligand discovery may proceed.
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18
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Abstract
Pathway dependence is common in self-assembly. Herein, the importance of pathway dependence for redox-driven gels is shown by constructing a FeII /FeIII redox-based metal-organic gel system is shown. In situ oxidation of the FeII ions at different rates results in conversion of a FeII gel into a FeIII organic gel, which controls the material properties, such as gel stiffness, gel strength, and an unusual swelling behaviour, is described. The rate of formation of FeIII ions determines the extent of intermolecular interactions and so whether gelation or precipitation occurs.
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Affiliation(s)
- Santanu Panja
- School of ChemistryUniversity of GlasgowGlasgowG12 8QQUK
| | - Dave J. Adams
- School of ChemistryUniversity of GlasgowGlasgowG12 8QQUK
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19
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Mallory JD, Kolomeisky AB, Igoshin OA. Kinetic control of stationary flux ratios for a wide range of biochemical processes. Proc Natl Acad Sci U S A 2020; 117:8884-9. [PMID: 32265281 DOI: 10.1073/pnas.1920873117] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
One of the most intriguing features of biological systems is their ability to regulate the steady-state fluxes of the underlying biochemical reactions; however, the regulatory mechanisms and their physicochemical properties are not fully understood. Fundamentally, flux regulation can be explained with a chemical kinetic formalism describing the transitions between discrete states, with the reaction rates defined by an underlying free energy landscape. Which features of the energy landscape affect the flux distribution? Here we prove that the ratios of the steady-state fluxes of quasi-first-order biochemical processes are invariant to energy perturbations of the discrete states and are only affected by the energy barriers. In other words, the nonequilibrium flux distribution is under kinetic and not thermodynamic control. We illustrate the generality of this result for three biological processes. For the network describing protein folding along competing pathways, the probabilities of proceeding via these pathways are shown to be invariant to the stability of the intermediates or to the presence of additional misfolded states. For the network describing protein synthesis, the error rate and the energy expenditure per peptide bond is proven to be independent of the stability of the intermediate states. For molecular motors such as myosin-V, the ratio of forward to backward steps and the number of adenosine 5'-triphosphate (ATP) molecules hydrolyzed per step is demonstrated to be invariant to energy perturbations of the intermediate states. These findings place important constraints on the ability of mutations and drug perturbations to affect the steady-state flux distribution for a wide class of biological processes.
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20
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Xu M, Zhang L, Zhao F. One-Pot Aqueous Synthesis of Icosahedral Au as Bifunctional Candidates for Enhanced Glucose Electrooxidation and Surface-Enhanced Raman Scattering. ACS Appl Mater Interfaces 2020; 12:12186-12194. [PMID: 32054264 DOI: 10.1021/acsami.9b15715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bifunctional candidates, which could provide catalytic and plasmonic properties simultaneously, could activate a promising development for biomedicine. Here, we kinetically controlled and synthesized a penta-twinned icosahedral Au (Ih Au) by a facile wet-chemical protocol without assistance of stabilizers. Benefiting from icosahedral morphology and kinetic synthesis process, the Ih Au nanoparticles (NPs) incorporate three key advantages: (i) ample active sites/"hot spots" and surface strain, (ii) good stability/chemical inertness and easy functionalization, and (iii) biological compatibility and a clean surface, which could promote their electrocatalysis and photonic capacity. Ih Au NPs, as bifunctional nanomaterials, exert excellent electrocatalytic and surface-enhanced Raman scattering (SERS) performances. Ih Au delivers the highest glucose electrooxidation (GEO) peak current density with 6.87 mA cm-2, which is 14 times larger than that of Turkevich Au (0.49 mA cm-2) under the same condition. Moreover, the SERS signals of rhodamine 6G (R6G) on Ih Au are much stronger than that on the other corresponding Au counterparts. Particularly, the SERS intensity of R6G on Ih Au increases by about four times compared to that on Au NPs. This study motivates the great prospect for combining Ih Au's bifunctionalities and indicates the potential of bifunctional nanomaterials in biologically implanted devices.
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Affiliation(s)
- Man Xu
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Lichun Zhang
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Fengzhou Zhao
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
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21
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Berac CM, Zengerling L, Straβburger D, Otter R, Urschbach M, Besenius P. Evaluation of Charge-Regulated Supramolecular Copolymerization to Tune the Time Scale for Oxidative Disassembly of β-Sheet Comonomers. Macromol Rapid Commun 2019; 41:e1900476. [PMID: 31682046 DOI: 10.1002/marc.201900476] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/25/2019] [Indexed: 02/06/2023]
Abstract
A multistimuli-responsive supramolecular copolymerization is reported. The copolymerization is driven by hydrogen bond encoded β-sheet-based charge co-assembly into 1D nanorods in water, using glutamic acid or lysine residues in either of the peptide comonomers. The incorporation of methionine as hydrophobic amino acid supports β-sheet formation, but oxidation of the thioether side-chain to a sulfoxide functional group destabilizes the β-sheet ordered domains and induces disassembly of the supramolecular polymers. Using H2 O2 as reactive oxygen species, the time scale and kinetics of the oxidative disassembly are probed. Compared to the charge neutral homopolymers, it is found that the oxidative disassembly of the charged ampholytic copolymers is up to two times faster and is operative at neutral pH. The strategy is therefore an important addition to the growing field of amphiphilic polythioether containing (macro)molecular building blocks, particularly in view of tuning their oxidation induced disassembly which tends to be notoriously slow and requires high concentrations of reactive oxygen species or acidic reaction media.
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Affiliation(s)
- Christian M Berac
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.,Graduate School of Materials Science in Mainz, Staudingerweg 9, 55128, Mainz, Germany
| | - Lydia Zengerling
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - David Straβburger
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Ronja Otter
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Moritz Urschbach
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Pol Besenius
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.,Graduate School of Materials Science in Mainz, Staudingerweg 9, 55128, Mainz, Germany
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22
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Hu Y, He Z, Hao Y, Gong L, Pang M, Howard GP, Ahn HH, Brummet M, Chen K, Liu HW, Ke X, Zhu J, Anderson CF, Cui H, Ullman CG, Carrington CA, Pomper MG, Seo JH, Mittal R, Minn I, Mao HQ. Kinetic Control in Assembly of Plasmid DNA/Polycation Complex Nanoparticles. ACS Nano 2019; 13:10161-10178. [PMID: 31503450 DOI: 10.1021/acsnano.9b03334.s004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Polyelectrolyte complex (PEC) nanoparticles assembled from plasmid DNA (pDNA) and polycations such as linear polyethylenimine (lPEI) represent a major nonviral delivery vehicle for gene therapy tested thus far. Efforts to control the size, shape, and surface properties of pDNA/polycation nanoparticles have been primarily focused on fine-tuning the molecular structures of the polycationic carriers and on assembly conditions such as medium polarity, pH, and temperature. However, reproducible production of these nanoparticles hinges on the ability to control the assembly kinetics, given the nonequilibrium nature of the assembly process and nanoparticle composition. Here we adopt a kinetically controlled mixing process, termed flash nanocomplexation (FNC), that accelerates the mixing of pDNA solution with polycation lPEI solution to match the PEC assembly kinetics through turbulent mixing in a microchamber. This achieves explicit control of the kinetic conditions for pDNA/lPEI nanoparticle assembly, as demonstrated by the tunability of nanoparticle size, composition, and pDNA payload. Through a combined experimental and simulation approach, we prepared pDNA/lPEI nanoparticles having an average of 1.3 to 21.8 copies of pDNA per nanoparticle and average size of 35 to 130 nm in a more uniform and scalable manner than bulk mixing methods. Using these nanoparticles with defined compositions and sizes, we showed the correlation of pDNA payload and nanoparticle formulation composition with the transfection efficiencies and toxicity in vivo. These nanoparticles exhibited long-term stability at -20 °C for at least 9 months in a lyophilized formulation, validating scalable manufacture of an off-the-shelf nanoparticle product with well-defined characteristics as a gene medicine.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Christopher G Ullman
- Cancer Targeting Systems , Chesterford Research Park , Cambridge , CB10 1XL , U.K
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23
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Hu Y, He Z, Hao Y, Liu HW, Gong L, Howard G, Ahn HH, Brummet M, Ke X, Anderson C, Seo JH, Zhu J, Chen K, Pang Wan Rion M, Cui H, Ullman CG, Carrington CA, Pomper MG, Mittal R, Minn I, Mao HQ. Kinetic Control in Assembly of Plasmid DNA/Polycation Complex Nanoparticles. ACS Nano 2019; 13:10161-10178. [PMID: 31503450 PMCID: PMC7293580 DOI: 10.1021/acsnano.9b03334] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Polyelectrolyte complex (PEC) nanoparticles assembled from plasmid DNA (pDNA) and polycations such as linear polyethylenimine (lPEI) represent a major nonviral delivery vehicle for gene therapy tested thus far. Efforts to control the size, shape, and surface properties of pDNA/polycation nanoparticles have been primarily focused on fine-tuning the molecular structures of the polycationic carriers and on assembly conditions such as medium polarity, pH, and temperature. However, reproducible production of these nanoparticles hinges on the ability to control the assembly kinetics, given the nonequilibrium nature of the assembly process and nanoparticle composition. Here we adopt a kinetically controlled mixing process, termed flash nanocomplexation (FNC), that accelerates the mixing of pDNA solution with polycation lPEI solution to match the PEC assembly kinetics through turbulent mixing in a microchamber. This achieves explicit control of the kinetic conditions for pDNA/lPEI nanoparticle assembly, as demonstrated by the tunability of nanoparticle size, composition, and pDNA payload. Through a combined experimental and simulation approach, we prepared pDNA/lPEI nanoparticles having an average of 1.3 to 21.8 copies of pDNA per nanoparticle and average size of 35 to 130 nm in a more uniform and scalable manner than bulk mixing methods. Using these nanoparticles with defined compositions and sizes, we showed the correlation of pDNA payload and nanoparticle formulation composition with the transfection efficiencies and toxicity in vivo. These nanoparticles exhibited long-term stability at -20 °C for at least 9 months in a lyophilized formulation, validating scalable manufacture of an off-the-shelf nanoparticle product with well-defined characteristics as a gene medicine.
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Affiliation(s)
- Yizong Hu
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Zhiyu He
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Yue Hao
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Heng-wen Liu
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Like Gong
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Gregory Howard
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Hye-Hyun Ahn
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Mary Brummet
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Xiyu Ke
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Caleb Anderson
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jung-Hee Seo
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jinchang Zhu
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Kuntao Chen
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Marion Pang Wan Rion
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Honggang Cui
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | | | | | - Martin G. Pomper
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Rajat Mittal
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Il Minn
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Hai-Quan Mao
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Correspondence should be addressed to Dr. Hai-Quan Mao: 3400 N. Charles Street, Croft Hall 100, Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD, 21218, USA.
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24
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Velázquez-Salazar JJ, Bazán-Díaz L, Zhang Q, Mendoza-Cruz R, Montaño-Priede L, Guisbiers G, Large N, Link S, José-Yacamán M. Controlled Overgrowth of Five-Fold Concave Nanoparticles into Plasmonic Nanostars and Their Single-Particle Scattering Properties. ACS Nano 2019; 13:10113-10128. [PMID: 31419107 DOI: 10.1021/acsnano.9b03084] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Growth of anisotropic nanostructures enables the manipulation of optical properties across the electromagnetic spectrum by fine morphological tuning of the nanoparticles. Among them, stellated metallic nanostructures present enhanced properties owing to their complex shape, and hence, the control over the final morphology becomes of great importance. Herein, a seed-mediated method for the high-yield production of goldrich-copper concave branched nanostructures and their structural and optical characterization is reported. The synthesis protocol enabled excellent control and tunability of the final morphology, from concave pentagonal nanoparticles to five-fold branched nanoparticles, named "nanostars". The anisotropic shape was achieved via kinetic control over the synthesis conditions by selective passivation of facets using a capping agent and assisted by the presence of copper chloride ions, both having a crucial impact over the final structure. Optical extinction measurements of nanostars in solution indicated a broad spectral response, hiding the properties of the individual nanostars. Hence, single-particle scattering measurements of individual concave pentagonal nanoparticles and concave nanostars were performed to determine the origin of the multiple plasmon bands by correlation with their morphological features, following their growth evolution. Finite-difference time-domain calculations delivered insights into the geometry-dependent plasmonic properties of concave nanostars and their packed aggregates. Our results uncover the intrinsic scattering properties of individual nanostars and the origin of the broad spectral response, which is mostly due to z-direction packed aggregates.
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Affiliation(s)
| | | | | | | | | | - Grégory Guisbiers
- Department of Physics & Astronomy , The University of Arkansas at Little Rock , 2801 South University Avenue , Little Rock , Arkansas 72204 , United States
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25
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Zhang R, Xia B, Xu H, Lin N. Kinetically Controlled Synthesis of Four- and Six-Member Cyclic Products via Sequential Aryl-Aryl Coupling on a Au(111) Surface. Chemphyschem 2019; 20:2292-2296. [PMID: 31050084 DOI: 10.1002/cphc.201900256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Indexed: 11/10/2022]
Abstract
We synthesize four- and six-member cyclic products via sequential multi-step aryl-aryl coupling reactions of 2,3,6,7,10,11-hexabromotriphenylene molecules on a Au(111) surface. The final products as well as the organo-gold intermediate structures are identified using scanning tunneling microscopy and density-functional theory simulation. By adjusting reaction temperature and post-annealing temperature, we enhance/suppress the yields of the four-member and six-member cyclic products. We propose an underlying mechanism which is associated with different reaction kinetics of the first-order and second-order reactions. This work exemplifies intricate kinetically-controlled on-surface synthesis when multiple reactions of different reaction order are involved.
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Affiliation(s)
- Ran Zhang
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China
| | - Bowen Xia
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China.,Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Hu Xu
- Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Nian Lin
- Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China
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26
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Huang J, Jia H, Wang T, Feng L, Du P, Zhu J. Kinetic Control over Morphology of Nanoporous Graphene on Surface. Chemphyschem 2019; 20:2327-2332. [PMID: 31264361 DOI: 10.1002/cphc.201900349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/05/2019] [Indexed: 11/06/2022]
Abstract
On-surface synthesis of high-quality nanoporous graphene (NPG) for application in nanotechnology and nanodevices remains challenging. Rational design of molecular precursors and proper kinetic control over the reaction process are the two key factors to tune the synthesis. Herein, we report a detailed study of the coupling reactions of a planar halogen-substituted nanographene molecular precursor, hexaiodo-peri-hexabenzocoronene (I6 -HBC), on the Au(111) surface in the synthesis of NPG. The influence of three basic kinetic processes - molecular adsorption, migration, and coupling - on the synthesis was investigated. The results show that the HBC molecules deposited at low temperature predominantly desorb from the Au(111) surface during the annealing process, whereas depositing the precursor molecules onto a hot surface (700 K) can lead to the formation of NPG. However, at such a high surface temperature, simultaneous intermolecular dehydrogenative coupling between HBC monomers can hinder the ordered growth of NPG through Ullmann coupling. Moreover, the deposition rate of the precursors greatly influences the growth morphology of the NPG nanostructures.
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Affiliation(s)
- Jianmin Huang
- National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei 230029 and Dalian National Laboratory for Clean Energy, Dalian, 116023, P.R. China
| | - Hongxing Jia
- Hefei National Laboratory of Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, P. R. China
| | - Tao Wang
- National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei 230029 and Dalian National Laboratory for Clean Energy, Dalian, 116023, P.R. China
| | - Lin Feng
- National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei 230029 and Dalian National Laboratory for Clean Energy, Dalian, 116023, P.R. China
| | - Pingwu Du
- Hefei National Laboratory of Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, P. R. China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei 230029 and Dalian National Laboratory for Clean Energy, Dalian, 116023, P.R. China
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27
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Abstract
In living systems, self-assembly processes are driven by the consumption of chemical fuels. Synthetic adaptation of living systems can be achieved by coupling of competing pathways that drive the assembly and disassembly, respectively, under the influence of chemical fuels. Here, a pH-responsive transient gel system is created by simultaneous incorporation of two triggers, of which one is responsible for the initiation of the self-assembly by increasing the pH and the second trigger drives the disassembly by reducing the pH. This method allows us to prepare transient gels with a high degree of control over the self-assembly lifetime as well as the mechanical properties of the transient gels.
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Affiliation(s)
- Santanu Panja
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
| | | | - Dave J Adams
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
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28
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Guo Y, Liu Y, Gong Y, Xiong W, Zhang C, Zhao J, Che Y. Kinetic Control of a Self-Assembly Pathway towards Hidden Chiral Microcoils. Chemistry 2019; 25:7463-7468. [PMID: 30986323 DOI: 10.1002/chem.201901120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 11/10/2022]
Abstract
Manipulating the self-assembly pathway is essentially important in the supramolecular synthesis of organic nano- and microarchitectures. Herein, we design a series of photoisomerizable chiral molecules, and realize precise control over pathway complexity with external light stimuli. The hidden single-handed microcoils, rather than the straight microribbons through spontaneous assembly, are obtained through a kinetically controlled pathway. The competition between molecular interactions in metastable photostationary intermediates gives rise to a variety of molecular packing and thereby the possibility of chirality transfer from molecules to supramolecular assemblies.
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Affiliation(s)
- Yongxian Guo
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yin Liu
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanjun Gong
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wei Xiong
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chuang Zhang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanke Che
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
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29
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Zangoli M, Gazzano M, Monti F, Maini L, Gentili D, Liscio A, Zanelli A, Salatelli E, Gigli G, Baroncini M, Di Maria F. Thermodynamically versus Kinetically Controlled Self-Assembly of a Naphthalenediimide-Thiophene Derivative: From Crystalline, Fluorescent, n-Type Semiconducting 1D Needles to Nanofibers. ACS Appl Mater Interfaces 2019; 11:16864-16871. [PMID: 30993968 DOI: 10.1021/acsami.9b02404] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The control over aggregation pathways is a key requirement for present and future technologies, as it can provide access to a variety of sophisticated structures with unique functional properties. In this work, we demonstrate an unprecedented control over the supramolecular self-assembly of a semiconductive material, based on a naphthalenediimide core functionalized with phenyl-thiophene moieties at the imide termini, by trapping the molecules into different arrangements depending on the crystallization conditions. The control of the solvent evaporation rate enables the growth of highly elaborated hierarchical self-assembled structures: either in an energy-minimum thermodynamic state when the solvent is slowly evaporated forming needle-shaped crystals (polymorph α) or in a local energy-minimum state when the solvent is rapidly evaporated leading to the formation of nanofibers (polymorph β). The exceptional persistence of the kinetically trapped β form allowed the study and comparison of its characteristics with that of the stable α form, revealing the importance of molecular aggregation geometry in functional properties. Intriguingly, we found that compared to the thermodynamically stable α phase, characterized by a J-type aggregation, the β phase exhibits (i) an unusual strong blue shift of the emission from the charge-transfer state responsible for the solid-state luminescent enhancement, (ii) a higher work function with a "rigid shift" of the electronic levels, as shown by Kelvin probe force microscopy and cyclic voltammetry measurements, and (iii) a superior field-effect transistor mobility in agreement with an H-type aggregation as indicated by X-ray analysis and theoretical calculations.
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Affiliation(s)
- Mattia Zangoli
- CNR-ISOF , Via P. Gobetti 101 , I-40129 Bologna , Italy
- Mediteknology srl , Via P. Gobetti 101 , I-40129 Bologna , Italy
| | | | - Filippo Monti
- CNR-ISOF , Via P. Gobetti 101 , I-40129 Bologna , Italy
| | - Lucia Maini
- Department of Chemistry Giacomo Ciamician , University of Bologna , Via Selmi 2 , I-40126 Bologna , Italy
| | - Denis Gentili
- CNR-ISMN , Via P. Gobetti 101 , I-40129 Bologna , Italy
| | - Andrea Liscio
- CNR-IMM , Via del Fosso del Cavaliere 100 , I-00133 Roma , Italy
| | | | - Elisabetta Salatelli
- Department of Industrial Chemistry Toso Montanari , University of Bologna , Viale del Risorgimento 4 , I-40136 Bologna , Italy
| | - Giuseppe Gigli
- CNR-NANOTEC, c/o Campus Ecotekne, University of Salento , via Monteroni , I-73100 Lecce , Italy
| | - Massimo Baroncini
- CNR-ISOF , Via P. Gobetti 101 , I-40129 Bologna , Italy
- Department of Agricultural and Food Sciences-DISTAL , University of Bologna , Viale Fanin 44 , I-40126 Bologna , Italy
| | - Francesca Di Maria
- CNR-NANOTEC, c/o Campus Ecotekne, University of Salento , via Monteroni , I-73100 Lecce , Italy
- CNR-ISOF , Via P. Gobetti 101 , I-40129 Bologna , Italy
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30
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Yang JK, Hwang IJ, Cha MG, Kim HI, Yim D, Jeong DH, Lee YS, Kim JH. Reaction Kinetics-Mediated Control over Silver Nanogap Shells as Surface-Enhanced Raman Scattering Nanoprobes for Detection of Alzheimer's Disease Biomarkers. Small 2019; 15:e1900613. [PMID: 30957959 DOI: 10.1002/smll.201900613] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/20/2019] [Indexed: 06/09/2023]
Abstract
It is very challenging to accurately quantify the amounts of amyloid peptides Aβ40 and Aβ42, which are Alzheimer's disease (AD) biomarkers, in blood owing to their low levels. This has driven the development of sensitive and noninvasive sensing methods for the early diagnosis of AD. Here, an approach for the synthesis of Ag nanogap shells (AgNGSs) is reported as surface-enhanced Raman scattering (SERS) colloidal nanoprobes for the sensitive, selective, and multiplexed detection of Aβ40 and Aβ42 in blood. Raman label chemicals used for SERS signal generation modulate the reaction rate for AgNGSs production through the formation of an Ag-thiolate lamella structure, enabling the control of nanogaps at one nanometer resolution. The AgNGSs embedded with the Raman label chemicals emit their unique SERS signals with a huge intensity enhancement of up to 107 and long-term stability. The AgNGS nanoprobes, conjugated with an antibody specific to Aβ40 or Aβ42, are able to detect these AD biomarkers in a multiplexed manner in human serum based on the AgNGS SERS signals. Detection is possible for amounts as low as 0.25 pg mL-1 . The AgNGS nanoprobe-based sandwich assay has a detection dynamic range two orders of magnitude wider than that of a conventional enzyme-linked immunosorbent assay.
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Affiliation(s)
- Jin-Kyoung Yang
- Department of Chemical Engineering, Hanyang University, Ansan, 426-791, Republic of Korea
| | - In-Jun Hwang
- Department of Chemical Engineering, Hanyang University, Ansan, 426-791, Republic of Korea
| | - Myeong Geun Cha
- Department of Chemistry Education, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Hye-In Kim
- Department of Chemical Engineering, Hanyang University, Ansan, 426-791, Republic of Korea
| | - DaBin Yim
- Department of Chemical Engineering, Hanyang University, Ansan, 426-791, Republic of Korea
| | - Dae Hong Jeong
- Department of Chemistry Education, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Jong-Ho Kim
- Department of Chemical Engineering, Hanyang University, Ansan, 426-791, Republic of Korea
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31
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Wang W, Li X, He T, Liu Y, Jin M. Engineering Surface Structure of Pt Nanoshells on Pd Nanocubes to Preferentially Expose Active Surfaces for ORR by Manipulating the Growth Kinetics. Nano Lett 2019; 19:1743-1748. [PMID: 30721082 DOI: 10.1021/acs.nanolett.8b04735] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Synthesis of Pt nanoshells on substrates can increase the utilization efficiency of Pt atoms and reduce the amount of Pt used in the applications. However, it is still an enormous challenge in tailoring the required crystal facets of Pt nanoshells on a given substrate. In this work, we demonstrate a facile and convenient approach capable for generating Pt octahedral islands with tunable sizes and densities on Pd nanocubes by manipulating the deposition rate. The key to this synthesis is the fine control over the deposition rate of Pt on Pd seeds. Because of the different reactivities at the surface sites, the deposition of Pt can be controlled at a certain site by carefully tuning the deposition rate. With a low concentration of reductant (8.33 mg/mL of glucose), surface diffusion dominates the process, and thus the Pt cubic shells form on Pd cubic seeds. In contrast, when a higher amount of the reductant (16.67 mg/mL of glucose) is added, the deposition starts to dominate the growth of Pt shells. In this case, the deposition would be controlled at the corners, forming eight large Pt octahedra on a cubic Pd seed. Further increasing the deposition rate can induce much higher deposition rates, in which case, the deposition of Pt would likely take place not only at the corners, but also the edge and surface sites of the seeds. Not surprisingly, this growth habit can result in the formation of high-density octahedral islands on Pd cubic seeds. With the same amount of precursor supply, the higher the densities of Pt islands, the smaller the size of the octahedral islands on Pd nanocubes. Unlike other synthetic methods, the size of the octahedral islands on Pd seeds can be even controlled to be smaller than 3 nm by controlling the amount of the Pt precursor. Considering the excellent performance of {111} facets of Pt catalysts toward ORR, the Pt nanocages with small octahedral islands on the surfaces can exhibit a high activity with a mass activity 0.68 A/mg, as high as 5.2 times of that of commercial Pt/C.
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Affiliation(s)
- Weicong Wang
- Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Xiang Li
- Institute of Advanced Electrochemical Energy and School of Materials Science and Engineering , Xi'an University of Technology , Xi'an , Shaanxi 710048 , China
| | - Tianou He
- Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Yaming Liu
- Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Mingshang Jin
- Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
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32
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Wei H, Huang K, Zhang L, Ge B, Wang D, Lang J, Ma J, Wang D, Zhang S, Li Q, Zhang R, Hussain N, Lei M, Liu LM, Wu H. Ice Melting to Release Reactants in Solution Syntheses. Angew Chem Int Ed Engl 2018; 57:3354-3359. [PMID: 29383795 DOI: 10.1002/anie.201711128] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/25/2017] [Indexed: 11/11/2022]
Abstract
Aqueous solution syntheses are mostly based on mixing two solutions with different reactants. It is shown that freezing one solution and melting it in another solution provides a new interesting strategy to mix chemicals and to significantly change the reaction kinetics and thermodynamics. For example, a precursor solution containing a certain concentration of AgNO3 was frozen and dropped into a reductive NaBH4 solution at about 0 °C. The ultra-slow release of reactants was successfully achieved. An ice-melting process can be used to synthesize atomically dispersed metals, including cobalt, nickel, copper, rhodium, ruthenium, palladium, silver, osmium, iridium, platinum, and gold, which can be easily extended to other solution syntheses (such as precipitation, hydrolysis, and displacement reactions) and provide a generalized method to redesign the interphase reaction kinetics and ion diffusion in wet chemistry.
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Affiliation(s)
- Hehe Wei
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Kai Huang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Le Zhang
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Binghui Ge
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Dong Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China
| | - Jialiang Lang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Jingyuan Ma
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Da Wang
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Shuai Zhang
- AML, Department of Engineering Mechanics, State Key Laboratory of Tribology, Tsinghua University, Beijing, 100084, China
| | - Qunyang Li
- AML, Department of Engineering Mechanics, State Key Laboratory of Tribology, Tsinghua University, Beijing, 100084, China
| | - Ruoyu Zhang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Naveed Hussain
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Ming Lei
- State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Li-Min Liu
- School of Physics, Beihang University, Beijing, 100191, China
| | - Hui Wu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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33
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Chen AN, Scanlan MM, Skrabalak SE. Surface Passivation and Supersaturation: Strategies for Regioselective Deposition in Seeded Syntheses. ACS Nano 2017; 11:12624-12631. [PMID: 29164855 DOI: 10.1021/acsnano.7b07041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Crystal growth theory predicts that heterogeneous nucleation will occur preferentially at defect sites, such as the vertices rather than the faces of shape-controlled seeds. Platonic metal solids are generally assumed to have vertices with nearly identical chemical potentials, and also nearly identical faces, leading to the useful generality that heterogeneous nucleation preserves the symmetry of the original seeds in the final product. Herein, we test the limits of this generality in the extreme of low supersaturation, in an effort to expand the methods available for inducing anisotropic overgrowth. We formulate a strategy for favoring localized deposition that differentiates between both different vertices and different edges or faces, i.e., regioselective deposition. Deposition followed a simple kinetic model for nucleation rate, depending on wetting, supersaturation, and temperature. We demonstrate our ability to independently study the effects of varying supersaturation and surface passivation. Regioselective heterogeneous nucleation was achieved at low supersaturation by a kinetic preference for high-energy defect-rich sites over lower-energy sites. This outcome was also achieved by using capping agents to passivate facet sites where deposition was not desired. Collectively, the results presented herein provide a model for breaking the symmetry of seeded growth and for achieving regioselective deposition.
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Affiliation(s)
- Alexander N Chen
- Department of Chemistry, Indiana University , 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Mattea M Scanlan
- Department of Chemistry, Currens Hall 214, Western Illinois University , 1 University Circle, Macomb, Illinois 61455, United States
| | - Sara E Skrabalak
- Department of Chemistry, Indiana University , 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
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34
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Park J, Kanti Kabiraz M, Kwon H, Park S, Baik H, Choi SI, Lee K. Radially Phase Segregated PtCu@PtCuNi Dendrite@Frame Nanocatalyst for the Oxygen Reduction Reaction. ACS Nano 2017; 11:10844-10851. [PMID: 29024581 DOI: 10.1021/acsnano.7b04097] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pt-based alloy nanoframes have shown great potential as electrocatalysts toward the oxygen reduction reaction (ORR) in fuel cells. However, the intrinsically infirm nanoframes could be severely deformed during extended electro-cyclings, which eventually leads to the loss of the initial catalytic activity. Therefore, the structurally robust nanoframe is a worthy synthetic target. Furthermore, ternary alloy phase electrocatalysts offer more opportunities in optimizing the stability and activity than binary alloy ones. Herein, we report a robust PtCuNi ternary nanoframe, structurally fortified with an inner-lying PtCu dendrite, which shows a highly active and stable catalytic performance toward ORR. Remarkably, the PtCu@PtCuNi catalyst exhibited 11 and 16 times higher mass and specific activities than those of commercial Pt/C.
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Affiliation(s)
- Jongsik Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 02841, Korea
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
| | - Mrinal Kanti Kabiraz
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Korea
| | - Hyukbu Kwon
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
| | - Suhyun Park
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
| | - Hionsuck Baik
- Korea Basic Science Institute (KBSI) , Seoul 02841, Korea
| | - Sang-Il Choi
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Korea
| | - Kwangyeol Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 02841, Korea
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
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35
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Chen Q, Feng R, Xu J, Jia YY, Wang TT, Chang Z, Bu XH. Kinetic and Thermodynamic Control of Structure Transformations in a Family of Cobalt(II)-Organic Frameworks. ACS Appl Mater Interfaces 2017; 9:35141-35149. [PMID: 28920665 DOI: 10.1021/acsami.7b12925] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Dynamic metal-organic frameworks (MOFs) that respond to external stimuli have recently attracted great attention. However, the subtle control of dynamic processes as well as the illustration of the underlying mechanism, which is crucial for the targeted construction and modulation purpose, is extremely challenging. Herein, we report the achievement of simultaneous kinetic and thermodynamic modulation of the structure transformation processes of a family of cobalt(II)-organic frameworks, through the rational combination of coligand replacement, solvent molecule substitution, and ligand-based solid solution strategies. On the basis of the systematic investigation of the structural transformation behaviors, the underlying response mechanism and principles for modulation were illustrated. It is expected that this work can provide valuable hints for the study and further development of dynamic materials.
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Affiliation(s)
- Qiang Chen
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Rui Feng
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Jian Xu
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Yan-Yuan Jia
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Ting-Ting Wang
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Ze Chang
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Xian-He Bu
- School of Materials Science and Engineering, National Institute for Advanced Materials, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
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Robinson ME, Nazemi A, Lunn DJ, Hayward DW, Boott CE, Hsiao MS, Harniman RL, Davis SA, Whittell GR, Richardson RM, De Cola L, Manners I. Dimensional Control and Morphological Transformations of Supramolecular Polymeric Nanofibers Based on Cofacially-Stacked Planar Amphiphilic Platinum(II) Complexes. ACS Nano 2017; 11:9162-9175. [PMID: 28836765 DOI: 10.1021/acsnano.7b04069] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Square-planar platinum(II) complexes often stack cofacially to yield supramolecular fiber-like structures with interesting photophysical properties. However, control over fiber dimensions and the resulting colloidal stability is limited. We report the self-assembly of amphiphilic Pt(II) complexes with solubilizing ancillary ligands based on polyethylene glycol [PEGn, where n = 16, 12, 7]. The complex with the longest solubilizing PEG ligand, Pt-PEG16, self-assembled to form polydisperse one-dimensional (1D) nanofibers (diameters <5 nm). Sonication led to short seeds which, on addition of further molecularly dissolved Pt-PEG16 complex, underwent elongation in a "living supramolecular polymerization" process to yield relatively uniform fibers of length up to ca. 400 nm. The fiber lengths were dependent on the Pt-PEG16 complex to seed mass ratio in a manner analogous to a living covalent polymerization of molecular monomers. Moreover, the fiber lengths were unchanged in solution after 1 week and were therefore "static" with respect to interfiber exchange processes on this time scale. In contrast, similarly formed near-uniform fibers of Pt-PEG12 exhibited dynamic behavior that led to broadening of the length distribution within 48 h. After aging for 4 weeks in solution, Pt-PEG12 fibers partially evolved into 2D platelets. Furthermore, self-assembly of Pt-PEG7 yielded only transient fibers which rapidly evolved into 2D platelets. On addition of further fiber-forming Pt complex (Pt-PEG16), the platelets formed assemblies via the growth of fibers selectively from their short edges. Our studies demonstrate that when interfiber dynamic exchange is suppressed, dimensional control and hierarchical structure formation are possible for supramolecular polymers through the use of kinetically controlled seeded growth methods.
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Affiliation(s)
| | | | | | | | | | - Ming-Siao Hsiao
- UES, Inc. and Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base , Wright-Patterson AFB, Ohio 45433, United States
| | | | | | | | | | - Luisa De Cola
- ISIS and icFRC, Université de Strasbourg and CNRS , 8 Allée Gaspard Monge, 67000 Strasbourg, France
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37
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Park J, Sa YJ, Baik H, Kwon T, Joo SH, Lee K. Iridium-Based Multimetallic Nanoframe@Nanoframe Structure: An Efficient and Robust Electrocatalyst toward Oxygen Evolution Reaction. ACS Nano 2017; 11:5500-5509. [PMID: 28599106 DOI: 10.1021/acsnano.7b00233] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanoframe electrocatalysts have attracted great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of morphologies, more complex nanoframe structures such as a double-layered nanoframe have not yet been realized. Herein, we report a rational synthetic strategy for a structurally robust Ir-based multimetallic double-layered nanoframe (DNF) structure, nanoframe@nanoframe. By leveraging the differing kinetics of dual Ir precursors and dual transition metal (Ni and Cu) precursors, a core-shell-type alloy@alloy structure could be generated in a simple one-step synthesis, which was subsequently transformed into a multimetallic IrNiCu DNF with a rhombic dodecahedral morphology via selective etching. The use of single Ir precursor yielded single nanoframe structures, highlighting the importance of employing dual Ir precursors. In addition, the structure of Ir-based nanocrystals could be further controlled to DNF with octahedral morphology and CuNi@Ir core-shell structures via a simple tuning of experimental factors. The IrNiCu DNF exhibited high electrocatalytic activity for oxygen evolution reaction (OER) in acidic media, which is better than Ir/C catalyst. Furthermore, IrNiCu DNF demonstrated excellent durability for OER, which could be attributed to the frame structure that prevents the growth and agglomeration of particles as well as in situ formation of robust rutile IrO2 phase during prolonged operation.
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Affiliation(s)
- Jongsik Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 02841, Korea
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
| | | | - Hionsuck Baik
- Korea Basic Science Institute (KBSI) , Seoul 02841, Korea
| | - Taehyun Kwon
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 02841, Korea
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
| | | | - Kwangyeol Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS) , Seoul 02841, Korea
- Department of Chemistry and Research Institute for Natural Sciences, Korea University , Seoul 02841, Korea
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38
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Lim J, Jin X, Jo YK, Lee S, Hwang SJ. Kinetically Controlled Layer-by-Layer Stacking of Metal Oxide 2D Nanosheets. Angew Chem Int Ed Engl 2017; 56:7093-7096. [PMID: 28523902 DOI: 10.1002/anie.201701738] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/19/2017] [Indexed: 11/11/2022]
Abstract
An efficient chemical way to finely control the layer-by-layer stacking of inorganic nanosheets (NS) is developed by tuning the type and composition of intercalant ion, and the reaction temperature for restacking process. The finely controlled stacking of NS relies on a kinetic control of the self-assembly of NS in the presence of coordinating organic cations. A critical role of organic cations in this assembly highlights the importance of the appropriate activation energy. Of prime importance is that a fine-control of the interstratification of 2D NS is highly effective not only in tailoring its pore structure but also in enhancing its electrode activity. The present study clearly demonstrates that the kinetically controlled restacking of NS provides a facile and powerful method to tailor their stacking number and functionality.
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Affiliation(s)
- Joohyun Lim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Xiaoyan Jin
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Yun Kyung Jo
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Seul Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Seong-Ju Hwang
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
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39
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Pacheco-Ruiz S, Heaven S, Banks CJ. Effect of mean cell residence time on transmembrane flux, mixed-liquor characteristics and overall performance of a submerged anaerobic membrane bioreactor. Environ Technol 2017; 38:1263-1274. [PMID: 27590000 DOI: 10.1080/09593330.2016.1225127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 08/11/2016] [Indexed: 06/06/2023]
Abstract
Kinetic control of Mean Cell Residence Time (MCRT) was shown to have a significant impact on membrane flux under steady-state conditions. Two laboratory-scale flat-plate submerged anaerobic membrane bioreactors were operated for 245 days on a low-to-intermediate strength substrate with high suspended solids. Transmembrane pressure was maintained at 2.2 kPa throughout four experimental phases, while MCRT in one reactor was progressively reduced. This allowed very accurate measurement of sustainable membrane flux rates at different MCRTs, and hence the degree of membrane fouling. Performance data were gathered on chemical oxygen demand (COD) removal efficiency, and a COD mass balance was constructed accounting for carbon converted into new biomass and that lost in the effluent as dissolved methane. Measurements of growth yield at each MCRT were made, with physical characterisation of each mixed liquor based on capillary suction time. The results showed membrane flux and MLSS filterability was highest at short MCRT, although specific methane production (SMP) was lower since a proportion of COD removal was accounted for by higher biomass yield. There was no advantage in operating at an MCRT <25 days. When considering the most suitable MCRT there is thus a trade-off between membrane performance, SMP and waste sludge yield.
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Affiliation(s)
- Santiago Pacheco-Ruiz
- a Faculty of Engineering and the Environment , University of Southampton , Southampton , UK
| | - Sonia Heaven
- a Faculty of Engineering and the Environment , University of Southampton , Southampton , UK
| | - Charles J Banks
- a Faculty of Engineering and the Environment , University of Southampton , Southampton , UK
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40
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Pross A, Pascal R. How and why kinetics, thermodynamics, and chemistry induce the logic of biological evolution. Beilstein J Org Chem 2017; 13:665-674. [PMID: 28487761 PMCID: PMC5389199 DOI: 10.3762/bjoc.13.66] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/20/2017] [Indexed: 12/20/2022] Open
Abstract
Thermodynamic stability, as expressed by the Second Law, generally constitutes the driving force for chemical assembly processes. Yet, somehow, within the living world most self-organisation processes appear to challenge this fundamental rule. Even though the Second Law remains an inescapable constraint, under energy-fuelled, far-from-equilibrium conditions, populations of chemical systems capable of exponential growth can manifest another kind of stability, dynamic kinetic stability (DKS). It is this stability kind based on time/persistence, rather than on free energy, that offers a basis for understanding the evolutionary process. Furthermore, a threshold distance from equilibrium, leading to irreversibility in the reproduction cycle, is needed to switch the directive for evolution from thermodynamic to DKS. The present report develops these lines of thought and argues against the validity of a thermodynamic approach in which the maximisation of the rate of energy dissipation/entropy production is considered to direct the evolutionary process. More generally, our analysis reaffirms the predominant role of kinetics in the self-organisation of life, which, in turn, allows an assessment of semi-quantitative constraints on systems and environments from which life could evolve.
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Affiliation(s)
- Addy Pross
- Department of Chemistry, Ben Gurion University of the Negev, Be’er Sheva 84105, Israel
- NYU Shanghai, 1555 Century Avenue, Pudong New Area, Shanghai, 200122, China
| | - Robert Pascal
- Institut des Biomolécules Max Mousseron, UMR5247 CNRS-University of Montpellier-ENSCM, CC17006, Place E. Bataillon, Montpellier F-34095, France
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41
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da Silva RR, Yang M, Choi SI, Chi M, Luo M, Zhang C, Li ZY, Camargo PHC, Ribeiro SJL, Xia Y. Facile Synthesis of Sub-20 nm Silver Nanowires through a Bromide-Mediated Polyol Method. ACS Nano 2016; 10:7892-900. [PMID: 27483165 DOI: 10.1021/acsnano.6b03806] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Essentially all of the Ag nanowires reported in the literature have sizes larger than 30 nm in diameter. In this article, we report a simple and robust approach to the synthesis of Ag nanowires with diameters below 20 nm and aspect ratios over 1000 using a one-pot polyol method. The Ag nanowires took a penta-twinned structure, and they could be obtained rapidly (<35 min) and in high morphology purity (>85% of the as-obtained solid product) under atmospheric pressure. The key to the success of this synthesis is to restrain the nanowires from lateral growth by employing both Br(-) ions and poly(vinylpyrrolidone) with a high molecular weight of 1 300 000 g/mol to cap the {100} side faces, together with the use of a syringe pump to slowly introduce AgNO3 into the reaction solution. By optimizing the ratios between the capping agents and AgNO3, we were able to slow down the reduction kinetics and effectively direct the Ag nanowires to grow along the longitudinal direction only. The nanowires showed great mechanical flexibility and could be bent with acute angles without breaking. Because of their small diameters, the transverse localized surface plasmon resonance peak of the Ag nanowires could be pushed down to the ultraviolet region, below 400 nm, making them ideal conductive elements for the fabrication of touch screens, solar cells, and smart windows.
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Affiliation(s)
- Robson Rosa da Silva
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
- Institute of Chemistry, São Paulo State University-UNESP , C P 355, 14801-970 Araraquara, Brazil
| | - Miaoxin Yang
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Sang-Il Choi
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
| | - Miaofang Chi
- Materials Science Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37830, United States
| | - Ming Luo
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
| | - Chao Zhang
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Science , Beijing 100190, People's Republic of China
| | - Zhi-Yuan Li
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Science , Beijing 100190, People's Republic of China
| | - Pedro H C Camargo
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , 05508-000 São Paulo, Brazil
| | - Sidney José Lima Ribeiro
- Institute of Chemistry, São Paulo State University-UNESP , C P 355, 14801-970 Araraquara, Brazil
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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42
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Meng M, Fang Z, Zhang C, Su H, He R, Zhang R, Li H, Li ZY, Wu X, Ma C, Zeng J. Integration of Kinetic Control and Lattice Mismatch To Synthesize Pd@AuCu Core-Shell Planar Tetrapods with Size-Dependent Optical Properties. Nano Lett 2016; 16:3036-41. [PMID: 27074129 DOI: 10.1021/acs.nanolett.6b00002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Planar nanocrystals with multiple branches exhibit unique localized surface plasmon resonance properties and great promise in optical applications. Here, we report an aqueous synthesis of Pd@AuCu core-shell planar tetrapods through preferential overgrowth on Pd cubic seeds. The large lattice mismatch between the Pd core and the AuCu shell is the key to induce the formation of branches under sluggish reduction kinetics. Meanwhile, the capping effect of cetyltrimethylammonium chloride on the {100} facets of Pd cubes with an aspect ratio of 1.2 can determine the growth direction of AuCu branches to form a planar structure. Through simply varying the amounts of Pd cubic seeds, the sizes of products can be well-controlled in the range from 33 to 70 nm. With the manipulation of sizes, the peak position of in-plane dipole resonance can be adjusted from visible to near-infrared region. Due to the presence of tips and edges in the branches, planar tetrapods exhibited excellent surface-enhanced Raman scattering performance with an enhancement factor up to 9.0 × 10(3) for 70 nm Pd@AuCu planar tetrapods.
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Affiliation(s)
- Min Meng
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Zhicheng Fang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Chao Zhang
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences , P.O. Box 603, Beijing 100190, P. R. China
| | - Hongyang Su
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Rong He
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Renpeng Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Zhi-Yuan Li
- Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences , P.O. Box 603, Beijing 100190, P. R. China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Chao Ma
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
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43
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Ye H, Wang Q, Catalano M, Lu N, Vermeylen J, Kim MJ, Liu Y, Sun Y, Xia X. Ru Nanoframes with an fcc Structure and Enhanced Catalytic Properties. Nano Lett 2016; 16:2812-2817. [PMID: 26999499 DOI: 10.1021/acs.nanolett.6b00607] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Noble-metal nanoframes are of great interest to many applications due to their unique open structures. Among various noble metals, Ru has never been made into nanoframes. In this study, we report for the first time an effective method based on seeded growth and chemical etching for the facile synthesis of Ru nanoframes with high purity. The essence of this approach is to induce the preferential growth of Ru on the corners and edges of Pd truncated octahedra as the seeds by kinetic control. The resultant Pd-Ru core-frame octahedra could be easily converted to Ru octahedral nanoframes of ∼2 nm in thickness by selectively removing the Pd cores through chemical etching. Most importantly, in this approach the face-centered cubic (fcc) crystal structure of Pd seeds was faithfully replicated by Ru that usually takes an hcp structure. The fcc Ru nanoframes showed higher catalytic activities toward the reduction of p-nitrophenol by NaBH4 and the dehydrogenation of ammonia borane compared with hcp Ru nanowires with roughly the same thickness.
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Affiliation(s)
- Haihang Ye
- Department of Chemistry, Michigan Technological University , Houghton, Michigan 49931, United States
| | - Qingxiao Wang
- Department of Materials Science and Engineering, University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Massimo Catalano
- Department of Materials Science and Engineering, University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Ning Lu
- Department of Materials Science and Engineering, University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Joseph Vermeylen
- Department of Chemistry, Michigan Technological University , Houghton, Michigan 49931, United States
| | - Moon J Kim
- Department of Materials Science and Engineering, University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yugang Sun
- Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
| | - Xiaohu Xia
- Department of Chemistry, Michigan Technological University , Houghton, Michigan 49931, United States
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44
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Rong H, Mao J, Xin P, He D, Chen Y, Wang D, Niu Z, Wu Y, Li Y. Kinetically Controlling Surface Structure to Construct Defect-Rich Intermetallic Nanocrystals: Effective and Stable Catalysts. Adv Mater 2016; 28:2540-2546. [PMID: 26836038 DOI: 10.1002/adma.201504831] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 10/30/2015] [Indexed: 06/05/2023]
Abstract
Kinetic control of surface defects is achieved, and cubic, concave cubic, and defect-rich cubic intermetallic Pt3 Sn nanocrystals are prepared for the electro-oxidation of formic acid. The generality of this kinetic approach is demonstrated by the fabrication of Pt-Mn nanocrystals with different surface defects. The defect-rich nanocrystals exhibit high catalytic activity and stability concurrently, indicating their potential application in fuel cells.
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Affiliation(s)
- Hongpan Rong
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Junjie Mao
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Pingyu Xin
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Dongsheng He
- Center of Advanced Nanocatalysis, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yuanjun Chen
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Dingsheng Wang
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhiqiang Niu
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Yuen Wu
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
- Center of Advanced Nanocatalysis, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yadong Li
- Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China
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45
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Zhu P, Gu S, Shen X, Xu N, Tan Y, Zhuang S, Deng Y, Lu Z, Wang Z, Zhu J. Direct Conversion of Perovskite Thin Films into Nanowires with Kinetic Control for Flexible Optoelectronic Devices. Nano Lett 2016; 16:871-6. [PMID: 26797488 DOI: 10.1021/acs.nanolett.5b03504] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
With significant progress in the past decade, semiconductor nanowires have demonstrated unique features compared to their thin film counterparts, such as enhanced light absorption, mechanical integrity and reduced therma conductivity, etc. However, technologies of semiconductor thin film still serve as foundations of several major industries, such as electronics, displays, energy, etc. A direct path to convert thin film to nanowires can build a bridge between these two and therefore facilitate the large-scale applications of nanowires. Here, we demonstrate that methylammonium lead iodide (CH3NH3PbI3) nanowires can be synthesized directly from perovskite film by a scalable conversion process. In addition, with fine kinetic control, morphologies, and diameters of these nanowires can be well-controlled. Based on these perovskite nanowires with excellent optical trapping and mechanical properties, flexible photodetectors with good sensitivity are demonstrated.
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Affiliation(s)
- Pengchen Zhu
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Shuai Gu
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Xinpeng Shen
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Ning Xu
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Yingling Tan
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Shendong Zhuang
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Yu Deng
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Zhenda Lu
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Zhenlin Wang
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Jia Zhu
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
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46
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Wang B, Liu M, Zhou Z, Guo L. Surface Activation of Faceted Photocatalyst: When Metal Cocatalyst Determines the Nature of the Facets. Adv Sci (Weinh) 2015; 2:1500153. [PMID: 27980917 PMCID: PMC5115336 DOI: 10.1002/advs.201500153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 06/18/2015] [Indexed: 05/29/2023]
Abstract
Pt nanoparticles with tunable size are prepared on the entire surface of facet-engineered Cu2WS4 decahedral photocatalyst via a kinetic-controlled chemical reduction process. The {101} facets of the photocatalyst which featured photo-oxidation, are successfully activated for photoreduction by Pt. The resulting photocatalyst shows an activity nine times higher compared to that of the only {001}-facets activated catalyst obtained by a conventional in situ photodeposition route.
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Affiliation(s)
- Bin Wang
- International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi'an Jiaotong University Xi'an Shaanxi 710049 P.R. China
| | - Maochang Liu
- International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi'an Jiaotong University Xi'an Shaanxi 710049 P.R. China
| | - Zhaohui Zhou
- International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi'an Jiaotong University Xi'an Shaanxi 710049 P.R. China
| | - Liejin Guo
- International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi'an Jiaotong University Xi'an Shaanxi 710049 P.R. China
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47
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Shin Y, Song J, Kim D, Kang T. Facile Preparation of Ultrasmall Void Metallic Nanogap from Self-Assembled Gold-Silica Core-Shell Nanoparticles Monolayer via Kinetic Control. Adv Mater 2015; 27:4344-50. [PMID: 26111993 DOI: 10.1002/adma.201501163] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/27/2015] [Indexed: 05/28/2023]
Abstract
A facile preparation of ultrasmall 1-2 nm void metallic nanogaps on various solid substrates is proposed by utilizing the self-assembly of a uniform gold-silica core-shell nanoparticle monolayer at interfaces and chemical etching. The ultrasmall void metallic nanogap shows key advantages such as a strong near-field enhancement and free diffusion of analytes to the gap, which are useful in molecular sensing and monitoring.
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Affiliation(s)
- Yuna Shin
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 121-742, Korea
| | - Jihwan Song
- Department of Mechanical Engineering, Sogang University, Seoul, 121-742, Korea
| | - Dongchoul Kim
- Department of Mechanical Engineering, Sogang University, Seoul, 121-742, Korea
| | - Taewook Kang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 121-742, Korea
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48
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Wang Y, Peng HC, Liu J, Huang CZ, Xia Y. Use of reduction rate as a quantitative knob for controlling the twin structure and shape of palladium nanocrystals. Nano Lett 2015; 15:1445-50. [PMID: 25629786 DOI: 10.1021/acs.nanolett.5b00158] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Kinetic control is a powerful means for maneuvering the twin structure and shape of metal nanocrystals and thus optimizing their performance in a variety of applications. However, there is only a vague understanding of the explicit roles played by reaction kinetics due to the lack of quantitative information about the kinetic parameters. With Pd as an example, here we demonstrate that kinetic parameters, including rate constant and activation energy, can be derived from spectroscopic measurements and then used to calculate the initial reduction rate and further have this parameter quantitatively correlated with the twin structure of a seed and nanocrystal. On a quantitative basis, we were able to determine the ranges of initial reduction rates required for the formation of nanocrystals with a specific twin structure, including single-crystal, multiply twinned, and stacking fault-lined. This work represents a major step forward toward the deterministic syntheses of colloidal noble-metal nanocrystals with specific twin structures and shapes.
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Affiliation(s)
- Yi Wang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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49
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Zhu X, Jin S, Wang S, Meng X, Zhu C, Zhu M, Jin R. One-pot synthesis of phenylmethanethiolate-protected Au20(SR)16 and Au24(SR)20 nanoclusters and insight into the kinetic control. Chem Asian J 2013; 8:2739-45. [PMID: 23843277 DOI: 10.1002/asia.201300418] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/13/2013] [Indexed: 11/08/2022]
Abstract
We report two synthetic routes for concurrent formation of phenylmethanethiolate (-SCH2Ph)-protected Au20(SR)16 and Au24(SR)24 nanoclusters in one-pot by kinetic control. Unlike the previously reported methods for thiolate-protected gold nanoclusters, which typically involve rapid reduction of the gold precursor by excess NaBH4 and subsequent size focusing into atomically monodisperse clusters of a specific size, the present work reveals some insight into the kinetic control in gold-thiolate cluster synthesis. We demonstrate that the synthesis of -SCH2Ph-protected Au20 and Au24 nanoclusters can be obtained through two different, kinetically controlled methods. Specifically, route 1 employs slow addition of a relatively large amount of NaBH4 under slow stirring of the reaction mixture, while route 2 employs rapid addition of a small amount of NaBH4 under rapid stirring of the reaction mixture. At first glance, these two methods apparently possess quite different reaction kinetics, but interestingly they give rise to exactly the same product (i.e., the coproduction of Au20(SCH2Ph)16 and Au24(SCH2Ph)20 clusters). Our results explicitly demonstrate the complex interplay between the kinetic factors that include the addition speed and amount of NaBH4 solution as well as the stirring speed of the reaction mixture. Such insight is important for devising synthetic routes for different sized nanoclusters. We also compared the photoluminescence and electrochemical properties of PhCH2S-protected Au20 and Au24 nanoclusters with the PhC2H4S-protected counterparts. A surprising 2.5 times photoluminescence enhancement was observed for the PhCH2S-capped nanoclusters when compared to the PhC2H4S-capped analogues, thereby indicating a drastic effect of the ligand that is merely one carbon shorter.
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Affiliation(s)
- Xiuyi Zhu
- Department of Chemistry, Anhui University, Hefei, Anhui 230039 (P. R. China)
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50
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Abstract
An efficient and broadly useful two-step ligation protocol is developed. Important mechanistic issues of ligation were probed from diastereomeric competition studies on the formation of the ligation products. We also report an instance of kinetically controlled ligation through the exploitation of selectivity differences between related N-termini. This study potentially provides a valuable approach to facilitate polypeptide synthesis by minimizing protecting group manipulations and intermediate isolations..
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Affiliation(s)
- Zhongping Tan
- Dr. Z. Tan, Dr. S. Shang, Prof. S. J. Danishefsky, Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065 (USA)
| | - Shiying Shang
- Dr. Z. Tan, Dr. S. Shang, Prof. S. J. Danishefsky, Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065 (USA)
| | - Samuel J. Danishefsky
- Dr. Z. Tan, Dr. S. Shang, Prof. S. J. Danishefsky, Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065 (USA)
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