1
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Leclaire J, Heldebrant DJ, Grubel K, Septavaux J, Hennebelle M, Walter E, Chen Y, Bañuelos JL, Zhang D, Nguyen MT, Ray D, Allec SI, Malhotra D, Joo W, King J. Tetrameric self-assembling of water-lean solvents enables carbamate anhydride-based CO 2 capture chemistry. Nat Chem 2024:10.1038/s41557-024-01495-z. [PMID: 38589626 DOI: 10.1038/s41557-024-01495-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 02/28/2024] [Indexed: 04/10/2024]
Abstract
Carbon capture, utilization and storage is a key yet cost-intensive technology for the fight against climate change. Single-component water-lean solvents have emerged as promising materials for post-combustion CO2 capture, but little is known regarding their mechanism of action. Here we present a combined experimental and modelling study of single-component water-lean solvents, and we find that CO2 capture is accompanied by the self-assembly of reverse-micelle-like tetrameric clusters in solution. This spontaneous aggregation leads to stepwise cooperative capture phenomena with highly contrasting mechanistic and thermodynamic features. The emergence of well-defined supramolecular architectures displaying a hydrogen-bonded internal core, reminiscent of enzymatic active sites, enables the formation of CO2-containing molecular species such as carbamic acid, carbamic anhydride and alkoxy carbamic anhydrides. This system extends the scope of adducts and mechanisms observed during carbon capture. It opens the way to materials with a higher CO2 storage capacity and provides a means for carbamates to potentially act as initiators for future oligomerization or polymerization of CO2.
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Affiliation(s)
- Julien Leclaire
- CNRS ICBMS UMR 5246, Universite Claude Bernard Lyon 1, Villeurbanne, France.
| | - David J Heldebrant
- Pacific Northwest National Laboratory, Richland, WA, USA.
- Washington State University Pullman, Pullman, WA, USA.
| | | | - Jean Septavaux
- CNRS ICBMS UMR 5246, Universite Claude Bernard Lyon 1, Villeurbanne, France
- Secoya Technologies, Ottignies-Louvain-la-Neuve, Belgium
| | - Marc Hennebelle
- CNRS ICBMS UMR 5246, Universite Claude Bernard Lyon 1, Villeurbanne, France
| | - Eric Walter
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Ying Chen
- Pacific Northwest National Laboratory, Richland, WA, USA
| | | | - Difan Zhang
- Pacific Northwest National Laboratory, Richland, WA, USA
| | | | - Debmalya Ray
- Pacific Northwest National Laboratory, Richland, WA, USA
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Sarah I Allec
- Pacific Northwest National Laboratory, Richland, WA, USA
| | | | - Wontae Joo
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Jaelynne King
- Pacific Northwest National Laboratory, Richland, WA, USA
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2
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Candeago R, Wang H, Nguyen MT, Doucet M, Glezakou VA, Browning JF, Su X. Unraveling the Role of Solvation and Ion Valency on Redox-Mediated Electrosorption through In Situ Neutron Reflectometry and Ab Initio Molecular Dynamics. JACS Au 2024; 4:919-929. [PMID: 38559709 PMCID: PMC10976571 DOI: 10.1021/jacsau.3c00705] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 04/04/2024]
Abstract
Solvation and ion valency effects on selectivity of metal oxyanions at redox-polymer interfaces are explored through in situ spatial-temporally resolved neutron reflectometry combined with large scale ab initio molecular dynamics. The selectivity of ReO4- vs MoO42- for two redox-metallopolymers, poly(vinyl ferrocene) (PVFc) and poly(3-ferrocenylpropyl methacrylamide) (PFPMAm) is evaluated. PVFc has a higher Re/Mo separation factor compared to PFPMAm at 0.6 V vs Ag/AgCl. In situ techniques show that both PVFc and PFPMAm swell in the presence of ReO4- (having higher solvation with PFPMAm), but do not swell in contact with MoO42-. Ab initio molecular simulations suggest that MoO42- maintains a well-defined double solvation shell compared to ReO4-. The more loosely solvated anion (ReO4-) is preferably adsorbed by the more hydrophobic redox polymer (PVFc), and electrostatic cross-linking driven by divalent anionic interactions could impair film swelling. Thus, the in-depth understanding of selectivity mechanisms can accelerate the design of ion-selective redox-mediated separation systems for transition metal recovery and recycling.
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Affiliation(s)
- Riccardo Candeago
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Hanyu Wang
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Manh-Thuong Nguyen
- Physical
and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mathieu Doucet
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | | | - James F. Browning
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiao Su
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
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3
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Qiu Y, Ray D, Yan L, Li X, Song M, Engelhard MH, Sun J, Lee MS, Zhang X, Nguyen MT, Glezakou VA, Wang Y, Rousseau R, Shao Y. Proton Relay for the Rate Enhancement of Electrochemical Hydrogen Reactions at Heterogeneous Interfaces. J Am Chem Soc 2023; 145:26016-26027. [PMID: 37976467 DOI: 10.1021/jacs.3c06398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Proton transfer is critically important to many electrocatalytic reactions, and directed proton delivery could open new avenues for the design of electrocatalysts. However, although this approach has been successful in molecular electrocatalysis, proton transfer has not received the same attention in heterogeneous electrocatalyst design. Here, we report that a metal oxide proton relay can be built within heterogeneous electrocatalyst architectures and improves the kinetics of electrochemical hydrogen evolution and oxidation reactions. The volcano-type relationship between activity enhancement and pKa of amine additives confirms this improvement; we observe maximum rate enhancement when the pKa of a proton relay matches the pH of the electrolyte solution. Density-functional-theory-based reactivity studies reveal a decreased proton transfer energy barrier with a metal oxide proton relay. These findings demonstrate the possibility of controlling the proton delivery and enhancing the reaction kinetics by tuning the chemical properties and structures at heterogeneous interfaces.
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Affiliation(s)
- Yang Qiu
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Debmalya Ray
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Litao Yan
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Xiaohong Li
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Miao Song
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Mark H Engelhard
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Junming Sun
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Mal-Soon Lee
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Xin Zhang
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Yong Wang
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Roger Rousseau
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yuyan Shao
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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4
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Nguyen MT, Fernandez CA, Haider MM, Chu KH, Jian G, Nassiri S, Zhang D, Rousseau R, Glezakou VA. Toward Self-Healing Concrete Infrastructure: Review of Experiments and Simulations across Scales. Chem Rev 2023; 123:10838-10876. [PMID: 37286529 DOI: 10.1021/acs.chemrev.2c00709] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cement and concrete are vital materials used to construct durable habitats and infrastructure that withstand natural and human-caused disasters. Still, concrete cracking imposes enormous repair costs on societies, and excessive cement consumption for repairs contributes to climate change. Therefore, the need for more durable cementitious materials, such as those with self-healing capabilities, has become more urgent. In this review, we present the functioning mechanisms of five different strategies for implementing self-healing capability into cement based materials: (1) autogenous self-healing from ordinary portland cement and supplementary cementitious materials and geopolymers in which defects and cracks are repaired through intrinsic carbonation and crystallization; (2) autonomous self-healing by (a) biomineralization wherein bacteria within the cement produce carbonates, silicates, or phosphates to heal damage, (b) polymer-cement composites in which autonomous self-healing occurs both within the polymer and at the polymer-cement interface, and (c) fibers that inhibit crack propagation, thus allowing autogenous healing mechanisms to be more effective. In all cases, we discuss the self-healing agent and synthesize the state of knowledge on the self-healing mechanism(s). In this review article, the state of computational modeling across nano- to macroscales developed based on experimental data is presented for each self-healing approach. We conclude the review by noting that, although autogenous reactions help repair small cracks, the most fruitful opportunities lay within design strategies for additional components that can migrate into cracks and initiate chemistries that retard crack propagation and generate repair of the cement matrix.
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Affiliation(s)
| | | | - Md Mostofa Haider
- University of California, Davis, One Shield Avenue, Davis, California 95616, USA
| | - Kung-Hui Chu
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Guoqing Jian
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Somayeh Nassiri
- University of California, Davis, One Shield Avenue, Davis, California 95616, USA
| | - Difan Zhang
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Roger Rousseau
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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5
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Tan S, Nguyen MT, Zhang D, Zhong L, Cheng Z, China S, Johnson GE, Prabhakaran V. Electric-Field-Induced Assembly of an Ionic Liquid-Water Interphase Enables Efficient Heavy Metal Electrosorption. ACS Appl Mater Interfaces 2023; 15:44469-44481. [PMID: 37676918 DOI: 10.1021/acsami.3c07465] [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: 09/09/2023]
Abstract
Controlling ion desolvation, transport, and charge transfer at the electrode-electrolyte interface (EEI) is critical to enable the rational design of the efficient and selective separation of targeted heavy metals and the decontamination of industrial wastewater. The main challenge is to sufficiently resolve and interrogate the desolvation of solvated metal ions and their subsequent electroreduction at the EEI and establish pathways to modulate these intermediate steps to achieve efficient energy transfer for targeted reactive separations. Herein, we obtained a predictive understanding of modulating the desolvation and electrosorption of Pb2+ cations using the hydrophobic ionic liquid 1-ethyl-3-methylimidazolium chloride (EMIMCl) in aqueous electrolyte. We revealed the formation of a compact interphase layer consisting of EMIMCl-Pb complexes under an applied electric field using operando electrochemical Raman spectroscopy, atomic force microscopy, and electrochemical impedance spectroscopy measurements combined with classical molecular dynamics simulations. A lower negative potential was shown to result in the formation of a well-oriented layer with the positive imidazolium ring of EMIMCl lying perpendicular to the electrode and the hydrophobic alkyl chain extending into the bulk electrolyte. This oriented layer, which formed from a dilute concentration of EMIMCl added to the electrolyte, was demonstrated to facilitate desolvation of incoming solvated Pb2+ cations and decrease the charge transfer resistance for Pb electrodeposition, which has important implications for the selective removal of Pb from contaminated mixtures. Overall, our findings open up new opportunities to modulate ion desolvation using hydrophobic ionic liquids in aqueous electrolytes for efficient heavy-metal separation.
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Affiliation(s)
- Shuai Tan
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Manh-Thuong Nguyen
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Difan Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Lirong Zhong
- Energy and Environmental Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zezhen Cheng
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Swarup China
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Grant E Johnson
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Venkateshkumar Prabhakaran
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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6
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Chen L, Allec SI, Nguyen MT, Kovarik L, Hoffman AS, Hong J, Meira D, Shi H, Bare SR, Glezakou VA, Rousseau R, Szanyi J. Dynamic Evolution of Palladium Single Atoms on Anatase Titania Support Determines the Reverse Water-Gas Shift Activity. J Am Chem Soc 2023; 145:10847-10860. [PMID: 37145876 DOI: 10.1021/jacs.3c02326] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Research interest in single-atom catalysts (SACs) has been continuously increasing. However, the lack of understanding of the dynamic behaviors of SACs during applications hinders catalyst development and mechanistic understanding. Herein, we report on the evolution of active sites over Pd/TiO2-anatase SAC (Pd1/TiO2) in the reverse water-gas shift (rWGS) reaction. Combining kinetics, in situ characterization, and theory, we show that at T ≥ 350 °C, the reduction of TiO2 by H2 alters the coordination environment of Pd, creating Pd sites with partially cleaved Pd-O interfacial bonds and a unique electronic structure that exhibit high intrinsic rWGS activity through the carboxyl pathway. The activation by H2 is accompanied by the partial sintering of single Pd atoms (Pd1) into disordered, flat, ∼1 nm diameter clusters (Pdn). The highly active Pd sites in the new coordination environment under H2 are eliminated by oxidation, which, when performed at a high temperature, also redisperses Pdn and facilitates the reduction of TiO2. In contrast, Pd1 sinters into crystalline, ∼5 nm particles (PdNP) during CO treatment, deactivating Pd1/TiO2. During the rWGS reaction, the two Pd evolution pathways coexist. The activation by H2 dominates, leading to the increasing rate with time-on-stream, and steady-state Pd active sites similar to the ones formed under H2. This work demonstrates how the coordination environment and nuclearity of metal sites on a SAC evolve during catalysis and pretreatments and how their activity is modulated by these behaviors. These insights on SAC dynamics and the structure-function relationship are valuable to mechanistic understanding and catalyst design.
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Affiliation(s)
- Linxiao Chen
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sarah I Allec
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Libor Kovarik
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Adam S Hoffman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jiyun Hong
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Debora Meira
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Honghong Shi
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Simon R Bare
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | | | - Roger Rousseau
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - János Szanyi
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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7
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Ward BJ, Nguyen MT, Sam SB, Korir N, Niwagaba CB, Morgenroth E, Strande L. Particle size as a driver of dewatering performance and its relationship to stabilization in fecal sludge. J Environ Manage 2023; 326:116801. [PMID: 36435127 DOI: 10.1016/j.jenvman.2022.116801] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/03/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Poor and unpredictable dewatering performance of fecal sludge is a major barrier to sanitation provision in urban areas not served by sewers. Fecal sludge comprises everything that accumulates in onsite containments, and its characteristics are distinct from wastewater sludges and from feces. There is little fundamental understanding of what causes poor dewatering in fecal sludge. For the first time, we demonstrate that particle size distribution is a driver of dewatering performance in fecal sludge, and is associated with level of stabilization. Higher concentrations of small particles (<10 μm) and smaller median aggregate size (D50) corresponded to poor dewatering performance (measured by capillary suction time (CST) and supernatant turbidity) in field samples from Kenya and Uganda and in controlled laboratory anaerobic storage experiments. More stabilized fecal sludge (higher C/N, lower VSS/TSS) had better dewatering performance, corresponding to lower concentrations of small particles. Samples with the largest aggregates (D50 > 90 μm) had higher abundance of Gammaproteobacteria Pseudomonas, and samples with the smallest aggregates (D50 ≤ 50 μm) were characterized by higher abundance of Bacteroidetes Vadin HA17 and Rikenellaceae. Contrary to common perceptions, stabilization, particle size distribution, and dewatering performance were not dependent on time intervals between emptying of onsite containments or on time in controlled anaerobic storage experiments. Our results suggest that the stabilization process in onsite containments, and hence the dewaterability of sludge arriving at treatment facilities, is not dependent on time in containment but is more likely associated with specific microbial populations and the in-situ environmental conditions which promote or discourage their growth.
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Affiliation(s)
- B J Ward
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; ETH Zürich, Institute of Environmental Engineering, Zürich, Switzerland.
| | - M T Nguyen
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; ETH Zürich, Institute of Environmental Engineering, Zürich, Switzerland
| | - S B Sam
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; ETH Zürich, Institute of Environmental Engineering, Zürich, Switzerland
| | | | - C B Niwagaba
- Makerere University, Department of Civil and Environmental Engineering, Kampala, Uganda
| | - E Morgenroth
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; ETH Zürich, Institute of Environmental Engineering, Zürich, Switzerland
| | - L Strande
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
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8
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Tan S, Zhang D, Nguyen MT, Shutthanandan V, Varga T, Rousseau R, Johnson GE, Glezakou VA, Prabhakaran V. Tuning the Charge and Hydrophobicity of Graphene Oxide Membranes by Functionalization with Ionic Liquids at Epoxide Sites. ACS Appl Mater Interfaces 2022; 14:19031-19042. [PMID: 35420797 DOI: 10.1021/acsami.2c02366] [Citation(s) in RCA: 2] [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] [Indexed: 06/14/2023]
Abstract
Functionalization of graphene oxide (GO) membranes is generally achieved using carboxyl groups as binding sites for ligands. Herein, by taking advantage of the ability of imidazolium-based ionic liquids (ILs) to undergo an epoxide ring-opening reaction, a new approach of GO modification was established, in which ILs were bonded to the abundant epoxides on GO without sacrificing the carboxyl groups. Computational methods confirmed this unique configuration of ILs on GO, which enabled the dispersion of IL/GO flakes in water for facile casting into laminate membranes. Compared with neat GO, the ILs in IL/GO membranes served as spacers that substantially reduced the multi-valent cation mobility, simultaneously facilitated ion desolvation, and increased the water flux across the membrane. Our studies found that the higher separation efficiency of IL/GO membranes may be attributed to the synergistic modification of the hydrophobicity and surface charge. Specifically, the protonated nitrogen of the imidazolium cations altered the surface charge of GO, thereby generating electrostatic repulsion that enhanced the selectivity of cation rejection. On the other hand, the increased length of the alkyl chains bound to the imidazolium rings was found to increase the hydrophobicity of GO, which, in turn, aided the fine-tuning of the water desolvation/transport dynamics at the GO/IL interface to achieve a high water flux. Additionally, the water retention was reduced on the hydrophobic planes, which inhibited GO swelling during aqueous separations. Molecular dynamics simulations revealed increased water diffusivity when ILs were intercalated within GO layers. We establish that without requiring a high energy input, functionalization of GO membranes with ILs may be a promising approach to achieve efficient ion separation and critical material recovery.
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Affiliation(s)
- Shuai Tan
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Difan Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Manh-Thuong Nguyen
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Vaithiyalingam Shutthanandan
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Tamas Varga
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Roger Rousseau
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Grant E Johnson
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Vassiliki-Alexandra Glezakou
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Venkateshkumar Prabhakaran
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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9
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Kollias L, Zhang D, Allec SI, Nguyen MT, Lee MS, Cantu DC, Rousseau R, Glezakou VA. Advanced Theory and Simulation to Guide the Development of CO 2 Capture Solvents. ACS Omega 2022; 7:12453-12466. [PMID: 35465123 PMCID: PMC9022203 DOI: 10.1021/acsomega.1c07398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
Increasing atmospheric concentrations of greenhouse gases due to industrial activity have led to concerning levels of global warming. Reducing carbon dioxide (CO2) emissions, one of the main contributors to the greenhouse effect, is key to mitigating further warming and its negative effects on the planet. CO2 capture solvent systems are currently the only available technology deployable at scales commensurate with industrial processes. Nonetheless, designing these solvents for a given application is a daunting task requiring the optimization of both thermodynamic and transport properties. Here, we discuss the use of atomic scale modeling for computing reaction energetics and transport properties of these chemically complex solvents. Theoretical studies have shown that in many cases, one is dealing with a rich ensemble of chemical species in a coupled equilibrium that is often difficult to characterize and quantify by experiment alone. As a result, solvent design is a balancing act between multiple parameters which have optimal zones of effectiveness depending on the operating conditions of the application. Simulation of reaction mechanisms has shown that CO2 binding and proton transfer reactions create chemical equilibrium between multiple species and that the agglomeration of resulting ions and zwitterions can have profound effects on bulk solvent properties such as viscosity. This is balanced against the solvent systems needing to perform different functions (e.g., CO2 uptake and release) depending on the thermodynamic conditions (e.g., temperature and pressure swings). The latter constraint imposes a "Goldilocks" range of effective parameters, such as binding enthalpy and pK a, which need to be tuned at the molecular level. The resulting picture is that solvent development requires an integrated approach where theory and simulation can provide the necessary ingredients to balance competing factors.
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Affiliation(s)
- Loukas Kollias
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Difan Zhang
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Sarah I. Allec
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Mal-Soon Lee
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - David C. Cantu
- Department
of Chemical and Materials Engineering, University
of Nevada, Reno, Reno, Nevada 89557, United States
| | - Roger Rousseau
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Vassiliki-Alexandra Glezakou
- Basic
& Applied Molecular Foundations, Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
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10
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Bramley GA, Nguyen MT, Glezakou VA, Rousseau R, Skylaris CK. Understanding Adsorption of Organics on Pt(111) in the Aqueous Phase: Insights from DFT Based Implicit Solvent and Statistical Thermodynamics Models. J Chem Theory Comput 2022; 18:1849-1861. [PMID: 35099965 DOI: 10.1021/acs.jctc.1c00894] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Adsorption of organics in the aqueous phase is an area which is experimentally difficult to measure, while computational techniques require extensive configurational sampling of the solvent and adsorbate. This is exceedingly computationally demanding, which excludes its routine use. If implicit solvent could be applied instead, this would dramatically reduce the computational cost as configurational sampling of solvent is not needed. Here, using statistical thermodynamic arguments and DFT calculations with implicit solvent models, we show that semiquantitative values for the free energy and entropy change of adsorption in the aqueous phase (ΔGadssolv and ΔSadssolv) for small organics can be calculated, for a range of coverages. We parametrize the soft sphere based solute dielectric cavity to an approximated free energy of solvation for a single Pt atom at the (111) facet, forming upper and lower bounds based on the entropy of water at the aqueous metal interface (ΔGsolv(Pt) = -4.35 to -7.18 kJ mol-1). This captures the decrease in ΔGadssolv compared to the free energy of adsorption in the vacuum phase (ΔGadsvac), while solvent models with electron density based cavities fail to do so. For a range of oxygenated aromatics, the adsorption energetics using horizontal gas phase geometries significantly overestimate ΔGadssolv compared to experiment by ∼100 kJ mol-1, but they agree with ab initio MD simulations using similar geometries. This suggests oxygenated aromatic compounds adsorb perpendicular to the metallic surface, while the ΔGadssolv for vertical geometries of furfural and cyclohexanol agree to within 20 kJ mol-1 of experimental studies. The proposed techniques provide an inexpensive toolset for validation and prediction of adsorption energetics on solvated metallic surfaces, which could be further validated by the future availability of more experimental measurements for the aqueous entropy/free energy of adsorption.
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Affiliation(s)
- Gabriel A Bramley
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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11
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Piccini G, Lee MS, Yuk SF, Zhang D, Collinge G, Kollias L, Nguyen MT, Glezakou VA, Rousseau R. Ab initio molecular dynamics with enhanced sampling in heterogeneous catalysis. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01329g] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Enhanced sampling ab initio simulations enable to study chemical phenomena in catalytic systems including thermal effects & anharmonicity, & collective dynamics describing enthalpic & entropic contributions, which can significantly impact on reaction free energy landscapes.
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Affiliation(s)
- GiovanniMaria Piccini
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Istituto Eulero, Università della Svizzera italiana, Via Giuseppe Buffi 13, Lugano, Ticino, Switzerland
| | - Mal-Soon Lee
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Simuck F. Yuk
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY 10996, USA
| | - Difan Zhang
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Greg Collinge
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Loukas Kollias
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Manh-Thuong Nguyen
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Vassiliki-Alexandra Glezakou
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Roger Rousseau
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA
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12
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Nguyen MT, Grubel K, Zhang D, Koech PK, Malhotra D, Allec S, Rousseau R, Glezakou VA, Heldebrant DJ. Amphilic Water-Lean Carbon Capture Solvent Wetting Behavior through Decomposition by Stainless-Steel Interfaces. ChemSusChem 2021; 14:5283-5292. [PMID: 34555259 DOI: 10.1002/cssc.202101350] [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] [Received: 07/28/2021] [Revised: 09/01/2021] [Indexed: 06/13/2023]
Abstract
A combined experimental and theoretical study has been carried out on the wetting and reactivity of water-lean carbon capture solvents on the surface of common column packing materials. Paradoxically, these solvents are found to be equally able to wet hydrophobic and hydrophilic surfaces. The solvents are amphiphilic and can adapt to any interfacial environment, owing to their inherent heterogeneous (nonionic/ionic) molecular structure. Ab initio molecular dynamics indicates that these structures enable the formation of a strong adlayer on the surface of hydrophilic surfaces like oxidized steel which promotes solvent decomposition akin to hydrolysis from surface oxides and hydroxides. This decomposition passivates the surface, making it effectively hydrophobic, and the decomposed solvent promotes leaching of the iron into the bulk fluid. This study links the wetting behavior to the observed corrosion of the steels by decomposition of solvent at steel interfaces. The overall affect is strongly dependent on the chemical composition of the solvent in that amines are stable, whereas imines and alcohols are not. Moreover, plastic packing shows little to no solvent degradation, but an equal degree of wetting.
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Affiliation(s)
- Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Katarzyna Grubel
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Difan Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Phillip K Koech
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Deepika Malhotra
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Sarah Allec
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | | | - David J Heldebrant
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Department of Chemical Engineering, Washington State University, Pullman, WA, USA
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13
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Nguyen MT, Rousseau R, Paviet PD, Glezakou VA. Actinide Molten Salts: A Machine-Learning Potential Molecular Dynamics Study. ACS Appl Mater Interfaces 2021; 13:53398-53408. [PMID: 34494435 DOI: 10.1021/acsami.1c11358] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Actinide molten salts represent a class of important materials in nuclear energy. Understanding them at a molecular level is critical for the proper and optimal design of relevant technological applications. Yet, owing to the complexity of electronic structure due to the 5f orbitals, computational studies of heavy elements in condensed phases using ab initio potentials to study the structure and dynamics of these elements embedded in molten salts are difficult. This lack of efficient computational protocols makes it difficult to obtain information on properties that require extensive statistical sampling like transport properties. To tackle this problem, we adopted a machine-learning approach to study ThCl4-NaCl and UCl3-NaCl binary systems. The machine-learning potential with the density functional theory accuracy allows us to obtain long molecular dynamics trajectories (ns) for large systems (103 atoms) at a considerably low computing cost, thereby efficiently gaining information about their bonding structures, thermodynamics, and dynamics at a range of temperatures. We observed a considerable change in the coordination environments of actinide elements and their characteristic coordination sphere lifetime. Our study also suggests that actinides in molten salts may not follow well-known entropy-scaling laws.
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Affiliation(s)
- Manh-Thuong Nguyen
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Roger Rousseau
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Patricia D Paviet
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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14
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Akhade SA, Lee MS, Meyer LC, Yuk SF, Nguyen MT, Sanyal U, Egbert JD, Gutiérrez OY, Glezakou VA, Rousseau R. Impact of functional groups on the electrocatalytic hydrogenation of aromatic carbonyls to alcohols. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.11.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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15
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Allec SI, Nguyen MT, Rousseau R, Glezakou VA. The role of sub-surface hydrogen on CO 2 reduction and dynamics on Ni(110): An ab initio molecular dynamics study. J Chem Phys 2021; 155:044702. [PMID: 34340378 DOI: 10.1063/5.0048894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The catalytic reduction in carbon dioxide is a crucial step in many chemical industrial reactions, such as methanol synthesis, the reverse water-gas shift reaction, and formic acid synthesis. Here, we investigate the role of bulk hydrogen, where hydrogen atoms are found deep inside a metal surface as opposed to subsurface ones, upon CO2 reduction over a Ni(110) surface using density functional theory and ab initio molecular dynamics simulations. While it has previously been shown that subsurface hydrogen stabilizes CO2 and can aid in overcoming reaction barriers, the role of bulk hydrogen is less studied and thus unknown with regard to CO2 reduction. We find that the presence of bulk hydrogen can significantly alter the electronic structure of the Ni(110) surface, particularly the work function and d-band center, such that CO2 adsorbs more strongly to the surface and is more easily reduced. Our results show an enhanced CO2 dissociation in the presence of bulk hydrogen, shedding light on a hitherto underappreciated mechanistic pathway for CO2 reduction on metal surfaces.
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Affiliation(s)
- Sarah I Allec
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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16
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Nguyen MT, Zhang J, Prabhakaran V, Tan S, Baxter ET, Shutthanandan V, Johnson GE, Rousseau R, Glezakou VA. Graphene Oxide as a Pb(II) Separation Medium: Has Part of the Story Been Overlooked? JACS Au 2021; 1:766-776. [PMID: 34467331 PMCID: PMC8395637 DOI: 10.1021/jacsau.0c00075] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Indexed: 06/13/2023]
Abstract
A key problem associated with the design of graphene oxide (GO) materials and their tuning for nanoscale separations is how specific functional groups influence the competitive adsorption of solvated ions and water at liquid/graphene interfaces. Computation accompanied by experiment shows that OH and COOH exert an influence on water adsorption properties stronger than that of O and H functional groups. The COO- anions, following COOH deprotonation, stabilize Pb(II) through strong electrostatic interactions. This suggests that, among the functional groups under study, COOH offers the best Pb(II) adsorption capacity and the ability to regenerate the sorbent through a pH swing. In line with computation, striking experimental observations revealed that a substantial increase in Pb(II) adsorption occurs with increasing pH. Our findings provide a systematic framework for controlled design and implementation of regenerable C-based sorbents used in separations and desalination.
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Affiliation(s)
- Manh-Thuong Nguyen
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Jun Zhang
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Venkateshkumar Prabhakaran
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Shuai Tan
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Eric T. Baxter
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Vaithiyalingam Shutthanandan
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Grant E. Johnson
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Roger Rousseau
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
| | - Vassiliki-Alexandra Glezakou
- Physical and Computational Sciences
Directorate, Pacific Northwest National
Laboratory, Richland, Washington 99352, United States
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17
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Lu JB, Cantu DC, Xu CQ, Nguyen MT, Hu HS, Glezakou VA, Rousseau R, Li J. Norm-Conserving Pseudopotentials and Basis Sets to Explore Actinide Chemistry in Complex Environments. J Chem Theory Comput 2021; 17:3360-3371. [PMID: 34032441 DOI: 10.1021/acs.jctc.1c00026] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We have developed a new set of norm-conserving pseudopotentials and companion Gaussian basis sets for the actinide (An) series (Ac-Lr) using the Goedecker, Teter, and Hutter (GTH) formalism with the Perdew, Burke, and Ernzerhof (PBE) exchange-correlation functional of generalized gradient approximation. To test the accuracy and reliability of the newly parameterized An-GTH pseudopotentials and basis sets, a variety of benchmarks on actinide-containing molecules were carried out and compared to all-electron and available experimental results. The new pseudopotentials include both medium- ([Xe]4f14) and large-core ([Xe]4f145d10) options that successfully reproduce the structures and energetics, particularly redox processes. The medium-core size set, in particular, reproduces all-electron calculations over multiple oxidation states from 0 to VII, whereas the large-core set is suitable only for the early series elements and low oxidation states. The underlying reason for these transferability issues is discussed in detail. This work fills a critical void in the literature for studying the chemistry of 5f-block elements in the condensed phase.
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Affiliation(s)
- Jun-Bo Lu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - David C Cantu
- Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - Cong-Qiao Xu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Manh-Thuong Nguyen
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Han-Shi Hu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Vassiliki-Alexandra Glezakou
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Roger Rousseau
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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18
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Campanella AJ, Nguyen MT, Zhang J, Ngendahimana T, Antholine WE, Eaton GR, Eaton SS, Glezakou VA, Zadrozny JM. Ligand control of low-frequency electron paramagnetic resonance linewidth in Cr(III) complexes. Dalton Trans 2021; 50:5342-5350. [PMID: 33881070 PMCID: PMC8173706 DOI: 10.1039/d1dt00066g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Understanding how the ligand shell controls low-frequency electron paramagnetic resonance (EPR) spectroscopic properties of metal ions is essential if they are to be used in EPR-based bioimaging schemes. In this work, we probe how specific variations in the ligand structure impact L-band (ca. 1.3 GHz) EPR spectroscopic linewidths in the trichloride salts of five Cr(iii) complexes: [Cr(RR-dphen)3]3+ (RR-dphen = (1R,2R)-(+)-diphenylethylenediamine, 1), [Cr(en)3]3+ (en = ethylenediamine, 2), [Cr(me-en)3]3+ (me-en = 1,2-diaminopropane, 3), [Cr(tn)3]3+ (tn = 1,3-diaminopropane, 4) [Cr(trans-chxn)3]3+ (trans-chxn = trans-(±)-1,2-diaminocyclohexane, 5). Spectral broadening varies in a nonintuitive manner across the series, showing the sharpest peaks for 1 and broadest for 5. Molecular dynamics simulations provide evidence that the broadening is correlated to rigidity in the inner coordination sphere and reflected in ligand-dependent distribution of Cr-N bond distances that can be found in frozen solution.
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Affiliation(s)
- Anthony J Campanella
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Jun Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Thacien Ngendahimana
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA
| | - William E Antholine
- National Biomedical EPR Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Gareth R Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA
| | - Sandra S Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA
| | | | - Joseph M Zadrozny
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
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Zhu Y, Yuk SF, Zheng J, Nguyen MT, Lee MS, Szanyi J, Kovarik L, Zhu Z, Balasubramanian M, Glezakou VA, Fulton JL, Lercher JA, Rousseau R, Gutiérrez OY. Environment of Metal–O–Fe Bonds Enabling High Activity in CO2 Reduction on Single Metal Atoms and on Supported Nanoparticles. J Am Chem Soc 2021; 143:5540-5549. [DOI: 10.1021/jacs.1c02276] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yifeng Zhu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Simuck F. Yuk
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jian Zheng
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Mal-Soon Lee
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Janos Szanyi
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Libor Kovarik
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Zihua Zhu
- William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Vassiliki-Alexandra Glezakou
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - John L. Fulton
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Johannes A. Lercher
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Roger Rousseau
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Oliver Y. Gutiérrez
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Nguyen MT, Glezakou VA, Lonergan J, McNamara B, Paviet PD, Rousseau R. Ab initio molecular dynamics assessment of thermodynamic and transport properties in (K,Li)Cl and (K, Na)Cl molten salt mixtures. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115262] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Shiery RC, Fulton JL, Balasubramanian M, Nguyen MT, Lu JB, Li J, Rousseau R, Glezakou VA, Cantu DC. Coordination Sphere of Lanthanide Aqua Ions Resolved with Ab Initio Molecular Dynamics and X-ray Absorption Spectroscopy. Inorg Chem 2021; 60:3117-3130. [DOI: 10.1021/acs.inorgchem.0c03438] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Richard C. Shiery
- Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - John L. Fulton
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jun-Bo Lu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - David C. Cantu
- Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
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22
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Phong PN, Ngoc NT, Lam PT, Nguyen MT, Nguyen HV. From half-metallic to magnetic semiconducting triazine g-C 4N 3: computational designs and insight. RSC Adv 2021; 11:38944-38948. [PMID: 35492469 PMCID: PMC9044481 DOI: 10.1039/d1ra05348e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 11/27/2021] [Indexed: 01/15/2023] Open
Abstract
We have given, for the first time, physicochemical insight into the electronic structure routes from half-metallic to magnetic semiconducting triazine g-C4N3. To this end, three material designs have been proposed using density functional calculations. In one design, this half-metal is first made semiconducting via hydrogenation, then tailored with B and N atomic species, which gives a new prototype of the antiferromagnetic semiconductor monolayer HC4N3BN. In the others, it can be rendered spin gapless semiconducting with H and B or C, followed by F or O tailoring, which eventually leads to the two new bipolar ferromagnetic semiconductors HC4N3BF and HC4N3CO. These monolayers are considered to be novel materials in spintronics. A simple picture of charge transfer has been given, for the first time, as physicochemical insight into the electronic structure routes from half-metallic to magnetic semiconducting triazine g-C4N3.![]()
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Affiliation(s)
- Pham Nam Phong
- School of Engineering Physics, Hanoi University of Science and Technology (HUST), 1 Dai Co Viet Road, Hanoi, Vietnam
| | - Nguyen Thi Ngoc
- School of Engineering Physics, Hanoi University of Science and Technology (HUST), 1 Dai Co Viet Road, Hanoi, Vietnam
| | - Pham Thanh Lam
- School of Engineering Physics, Hanoi University of Science and Technology (HUST), 1 Dai Co Viet Road, Hanoi, Vietnam
| | - Manh-Thuong Nguyen
- Institute of Physics, Vietnam Academy of Science and Technology (VAST), 10 Dao Tan Street, Hanoi, Vietnam
| | - Huy-Viet Nguyen
- Institute of Physics, Vietnam Academy of Science and Technology (VAST), 10 Dao Tan Street, Hanoi, Vietnam
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23
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Zhang J, Baxter ET, Nguyen MT, Prabhakaran V, Rousseau R, Johnson GE, Glezakou VA. Structure and Stability of the Ionic Liquid Clusters [EMIM] n[BF 4] n+1- ( n = 1-9): Implications for Electrochemical Separations. J Phys Chem Lett 2020; 11:6844-6851. [PMID: 32697088 DOI: 10.1021/acs.jpclett.0c01671] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Precise functionalization of electrodes with size-selected ionic liquid (IL) clusters may improve the application of ILs in electrochemical separations. Herein we report our combined experimental and theoretical investigation of the IL clusters 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM]n[BF4]n+1- (n = 1-9) and demonstrate their selectivity and efficiency toward targeted adsorption of ions from solution. The structures and energies of the IL clusters, predicted with global optimization, agree with and help interpret the ion abundances and stabilities measured by high-mass-resolution electrospray ionization mass spectrometry and collision-induced dissociation experiments. The [EMIM][BF4]2- cluster, which was identified as the most stable IL cluster, was selectively soft-landed onto a working electrode. Electrochemical impedance spectroscopy revealed a lower charge transfer resistance on the soft-landed electrode containing [EMIM][BF4]2- compared with an electrode prepared by drop-casting of an IL solution containing the full range of IL clusters. Our findings indicate that specific IL clusters may be used to increase the efficiency of electrochemical separations by lowering the overpotentials involved.
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Affiliation(s)
- Jun Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Eric T Baxter
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Venkateshkumar Prabhakaran
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Grant E Johnson
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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24
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Collinge G, Yuk SF, Nguyen MT, Lee MS, Glezakou VA, Rousseau R. Effect of Collective Dynamics and Anharmonicity on Entropy in Heterogenous Catalysis: Building the Case for Advanced Molecular Simulations. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01501] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Greg Collinge
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Simuck F. Yuk
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Mal-Soon Lee
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Vassiliki-Alexandra Glezakou
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Roger Rousseau
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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25
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Lu JB, Cantu DC, Nguyen MT, Li J, Glezakou VA, Rousseau R. Correction to Norm-Conserving Pseudopotentials and Basis Sets To Explore Lanthanide Chemistry in Complex Environments. J Chem Theory Comput 2020; 16:4754. [DOI: 10.1021/acs.jctc.0c00553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Bramley G, Nguyen MT, Glezakou VA, Rousseau R, Skylaris CK. Correction to Reconciling Work Functions and Adsorption Enthalpies for Implicit Solvent Models: A Pt (111)/Water Interface Case Study. J Chem Theory Comput 2020; 16:4755. [DOI: 10.1021/acs.jctc.0c00554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cantu DC, Malhotra D, Nguyen MT, Koech PK, Zhang D, Glezakou VA, Rousseau R, Page J, Zheng R, Perry RJ, Heldebrant DJ. Molecular-Level Overhaul of γ-Aminopropyl Aminosilicone/Triethylene Glycol Post-Combustion CO 2 -Capture Solvents. ChemSusChem 2020; 13:3429-3438. [PMID: 32369677 DOI: 10.1002/cssc.202000724] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/23/2020] [Indexed: 06/11/2023]
Abstract
Capturing carbon dioxide from post-combustion gas streams is an energy-intensive process that is required prior to either converting or sequestering CO2 . Although a few commercial 1st and 2nd generation aqueous amine technologies have been proposed, the cost of capturing CO2 with these technologies remains high. One approach to decrease costs of capture has been the development of water-lean solvents that aim to increase efficiency by reducing the water content in solution. Water-lean solvents, such as γ-aminopropyl aminosilicone/triethylene glycol (GAP/TEG), are promising technologies, with the potential to halve the parasitic load to a coal-fired power plant, albeit only if high solution viscosities and hydrolysis of the siloxane moieties can be mitigated. This study concerns an integrated multidisciplinary approach to overhaul the GAP/TEG solvent system at the molecular level to mitigate hydrolysis while also reducing viscosity. Cosolvents and diluents are found to have negligible effects on viscosity and are not needed. This finding allows for the design of single-component siloxane-free diamine derivatives with site-specific incorporation of selective chemical moieties for direct placement and orientation of hydrogen bonding to reduce viscosity. Ultimately, these new formulations are less susceptible to hydrolysis and exhibit up to a 98 % reduction in viscosity compared to the initial GAP/TEG formulation.
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Affiliation(s)
- David C Cantu
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- Present Address: Chemical and Materials Engineering Department, University of Nevada, Reno, NV, 89557, USA
| | - Deepika Malhotra
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Phillip K Koech
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Difan Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | | | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Jordan Page
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Richard Zheng
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Robert J Perry
- GE Global Research, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - David J Heldebrant
- Energy Processes and Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- Washington State University, Department of Chemical Engineering, Pullman, WA, 99164, USA
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Nguyen MT, Akhade SA, Cantu DC, Lee MS, Glezakou VA, Rousseau R. Electro-reduction of organics on metal cathodes: A multiscale-modeling study of benzaldehyde on Au (111). Catal Today 2020. [DOI: 10.1016/j.cattod.2019.05.067] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zhang J, Glezakou VA, Rousseau R, Nguyen MT. NWPEsSe: An Adaptive-Learning Global Optimization Algorithm for Nanosized Cluster Systems. J Chem Theory Comput 2020; 16:3947-3958. [PMID: 32364725 DOI: 10.1021/acs.jctc.9b01107] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Global optimization constitutes an important and fundamental problem in theoretical studies in many chemical fields, such as catalysis, materials, or separations problems. In this paper, a novel algorithm has been developed for the global optimization of large systems including neat and ligated clusters in the gas phase and supported clusters in periodic boundary conditions. The method is based on an updated artificial bee colony (ABC) algorithm method, that allows for adaptive-learning during the search process. The new algorithm is tested against four classes of systems of diverse chemical nature: gas phase Au55, ligated Au82+, Au8 supported on graphene oxide and defected rutile, and a large cluster assembly [Co6Te8(PEt3)6][C60]n, with sizes ranging between 1 and 3 nm and containing up to 1300 atoms. Reliable global minima (GMs) are obtained for all cases, either confirming published data or reporting new lower energy structures. The algorithm and interface to other codes in the form of an independent program, Northwest Potential Energy Search Engine (NWPEsSe), is freely available, and it provides a powerful and efficient approach for global optimization of nanosized cluster systems.
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Affiliation(s)
- Jun Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Yuk SF, Collinge G, Nguyen MT, Lee MS, Glezakou VA, Rousseau R. Selective acetylene hydrogenation over single metal atoms supported on Fe3O4(001): A first-principle study. J Chem Phys 2020; 152:154703. [DOI: 10.1063/1.5142748] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Simuck F. Yuk
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Greg Collinge
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Manh-Thuong Nguyen
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Mal-Soon Lee
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Vassiliki-Alexandra Glezakou
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Roger Rousseau
- Basic & Applied Molecular Foundations, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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Bramley G, Nguyen MT, Glezakou VA, Rousseau R, Skylaris CK. Reconciling Work Functions and Adsorption Enthalpies for Implicit Solvent Models: A Pt (111)/Water Interface Case Study. J Chem Theory Comput 2020; 16:2703-2715. [DOI: 10.1021/acs.jctc.0c00034] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Gabriel Bramley
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Manh-Thuong Nguyen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Roger Rousseau
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Marcinkowski MD, Yuk SF, Doudin N, Smith RS, Nguyen MT, Kay BD, Glezakou VA, Rousseau R, Dohnálek Z. Low-Temperature Oxidation of Methanol to Formaldehyde on a Model Single-Atom Catalyst: Pd Atoms on Fe3O4(001). ACS Catal 2019. [DOI: 10.1021/acscatal.9b03891] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Matthew D. Marcinkowski
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Simuck F. Yuk
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Nassar Doudin
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - R. Scott Smith
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Manh-Thuong Nguyen
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Bruce D. Kay
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Vassiliki-Alexandra Glezakou
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Roger Rousseau
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zdenek Dohnálek
- Physical and Computation Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
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Lu JB, Cantu DC, Nguyen MT, Li J, Glezakou VA, Rousseau R. Norm-Conserving Pseudopotentials and Basis Sets To Explore Lanthanide Chemistry in Complex Environments. J Chem Theory Comput 2019; 15:5987-5997. [DOI: 10.1021/acs.jctc.9b00553] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jun-Bo Lu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - David C. Cantu
- Chemical and Materials Engineering, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - Manh-Thuong Nguyen
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Vassiliki-Alexandra Glezakou
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Roger Rousseau
- Basic and Applied Molecular Foundations, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
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Doudin N, Yuk SF, Marcinkowski MD, Nguyen MT, Liu JC, Wang Y, Novotny Z, Kay BD, Li J, Glezakou VA, Parkinson G, Rousseau R, Dohnálek Z. Understanding Heterolytic H2 Cleavage and Water-Assisted Hydrogen Spillover on Fe3O4(001)-Supported Single Palladium Atoms. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01425] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Nassar Doudin
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Simuck F. Yuk
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Matthew D. Marcinkowski
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Manh-Thuong Nguyen
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jin-Cheng Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yang Wang
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zbynek Novotny
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Bruce D. Kay
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jun Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Vassiliki-Alexandra Glezakou
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Gareth Parkinson
- Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria
| | - Roger Rousseau
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zdenek Dohnálek
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
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Kennedy GM, Min MY, Fitzgerald JF, Nguyen MT, Schultz SL, Crum MT, Starke JA, Butkus MA, Bowman DD, Labare MP. Inactivation of the bacterial pathogens Staphylococcus pseudintermedius and Acinetobacter baumannii by butanoic acid. J Appl Microbiol 2019; 126:752-763. [PMID: 30578718 DOI: 10.1111/jam.14180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/22/2018] [Revised: 12/07/2018] [Accepted: 12/15/2018] [Indexed: 11/29/2022]
Abstract
AIMS This study was performed to evaluate the efficacy of butanoic acid against bacterial pathogens including Acinetobacter baumannii and Staphylococcus pseudintermedius. METHODS AND RESULTS Vegetative bacteria were exposed to butanoic acid in vitro and log reduction was quantified using viable count assays. The maximum (8 and 9) log inactivation was determined by qualitatively assaying for growth/no-growth after a 48-h incubation (37°C). Membrane integrity after exposure to butanoic acid was determined by propidium iodide staining, scanning electron microscopy, membrane depolarization and inductively coupled plasma analysis. Cytosolic pH was measured by 5-(6-)carboxyfluorescein succinimidyl ester. CONCLUSIONS Inhibitory concentrations of butanoic acid ranged between 11 and 21 mmol l-1 for Gram-positive and Gram-negative species tested. The maximum log reduction of A. baumannii was achieved with a 10-s exposure of 0·50 mol l-1 of butanoic acid. Staphylococcus pseudintermedius required 0·40 mol l-1 of butanoic acid to achieve the same level of reduction in the same time period. Inactivation was associated with membrane permeability and acidification of the cytosol. SIGNIFICANCE AND IMPACT OF THE STUDY Antibiotic resistance among bacterial pathogens necessitates the utilization of novel therapeutics for disinfection and biological control. These results may facilitate the development of butanoic acid as an effective agent against a broad-spectrum of antibiotic-resistant bacterial pathogens.
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Affiliation(s)
- G M Kennedy
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - M Y Min
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - J F Fitzgerald
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - M T Nguyen
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, NY, USA
| | - S L Schultz
- Department of Biology, University of New England, Biddeford, ME, USA
| | - M T Crum
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - J A Starke
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, NY, USA
| | - M A Butkus
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, NY, USA
| | - D D Bowman
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY, USA
| | - M P Labare
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
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Cantu DC, Padmaperuma AB, Nguyen MT, Akhade SA, Yoon Y, Wang YG, Lee MS, Glezakou VA, Rousseau R, Lilga MA. Erratum to “A Combined Experimental and Theoretical Study on the Activity and Selectivity of the Electrocatalytic Hydrogenation of Aldehydes”. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zheng J, Yu XY, Nguyen MT, Lao D, Zhu Y, Wang F, Heldebrant DJ. Assessing the impacts of dynamic soft-templates innate to switchable ionic liquids on nanoparticulate green rust crystalline structures. Chem Commun (Camb) 2019; 55:11239-11242. [DOI: 10.1039/c9cc04581c] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This experimental and theoretical study investigates how dynamic solvation environments in switchable ionic liquids regulate the composition of nanoparticulate green rust.
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Affiliation(s)
- Jian Zheng
- Physical and Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Xiao-Ying Yu
- Energy and Environment Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Manh-Thuong Nguyen
- Physical and Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - David Lao
- Energy and Environment Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Yifeng Zhu
- Physical and Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Feng Wang
- Sustainable Energy Technologies Department
- Brookhaven National Laboratory
- Upton
- USA
| | - David J. Heldebrant
- Energy and Environment Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
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38
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Yu XY, Yao J, Lao DB, Heldebrant DJ, Zhu Z, Malhotra D, Nguyen MT, Glezakou VA, Rousseau R. Mesoscopic Structure Facilitates Rapid CO 2 Transport and Reactivity in CO 2 Capture Solvents. J Phys Chem Lett 2018; 9:5765-5771. [PMID: 30205679 DOI: 10.1021/acs.jpclett.8b02231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mass transfer coefficients of CO2 are anomalously high in water-lean solvents as compared to aqueous amines. Such phenomena are intrinsic to the molecular and nanoscale structure of concentrated organic CO2 capture solvents. To decipher the connections, we performed in situ liquid time-of-flight secondary ionization mass spectroscopy on a representative water-lean solvent, 1-((1,3-Dimethylimidazolidin-2-ylidene)amino)propan-2-ol (IPADM-2-BOL). Two-dimensional (2D) and three-dimensional (3D) chemical mapping of the solvent revealed that IPADM-2-BOL exhibited a heterogeneous molecular structure with regions of CO2-free solvent coexisting with clusters of zwitterionic carbonate ions. Chemical mapping were consistent with molecular dynamic simulation results, indicating CO2 diffusing through pockets and channels of unreacted solvent. The observed mesoscopic structure promotes and enhances the diffusion and reactivity of CO2, likely prevalent in other water-lean solvents. This finding suggests that if the size, shape and orientation of the domains can be controlled, more efficient CO2 capture solvents could be developed to enhance mass-transfer and uptake kinetics.
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Affiliation(s)
- Xiao-Ying Yu
- Earth and Biological Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Juan Yao
- Earth and Biological Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - David B Lao
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - David J Heldebrant
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Zihua Zhu
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Deepika Malhotra
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Manh-Thuong Nguyen
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Vassiliki-Alexandra Glezakou
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Roger Rousseau
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
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Germain L, Larouche D, Nedelec B, Perreault I, Duranceau L, Bortoluzzi P, Beaudoin Cloutier C, Genest H, Caouette-Laberge L, Dumas A, Bussière A, Boghossian E, Kanevsky J, Leclerc Y, Lee J, Nguyen MT, Bernier V, Knoppers BM, Moulin VJ, Auger FA, Auger FA. Autologous bilayered self-assembled skin substitutes (SASSs) as permanent grafts: a case series of 14 severely burned patients indicating clinical effectiveness. Eur Cell Mater 2018; 36:128-141. [PMID: 30209799 DOI: 10.22203/ecm.v036a10] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Split-thickness skin autografts (AGs) are the standard surgical treatment for severe burn injuries. However, the treatment of patients with substantial skin loss is limited by the availability of donor sites for skin harvesting. As an alternative to skin autografts, our research group developed autologous self-assembled skin substitutes (SASSs), allowing the replacement of both dermis and epidermis in a single surgical procedure. The aim of the study was to assess the clinical outcome of the SASSs as a permanent coverage for full-thickness burn wounds. Patients were recruited through the Health Canada's Special Access Program. SASSs were grafted on debrided full-thickness wounds according to similar protocols used for AGs. The graft-take and the persistence of the SASS epithelium over time were evaluated. 14 patients received surgical care with SASSs. The mean percentage of the SASS graft-take was 98 % (standard deviation = 5) at 5 to 7 d after surgery. SASS integrity persisted over time (average follow-up time: 3.2 years), without noticeable deficiency in epidermal regeneration. Assessment of scar quality (skin elasticity, erythema, thickness) was performed on a subset of patients. Non-homogeneous pigmentation was noticed in several patients. These results indicated that the SASS allowed the successful coverage of full-thickness burns given its high graft-take, aesthetic outcome equivalent to autografting and the promotion of long-term tissue regeneration. When skin donor sites are in short supply, SASSs could be a valuable alternative to treat patients with full-thickness burns covering more than 50 % of their total body surface area.
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Affiliation(s)
- L Germain
- CHU de Québec-Université Laval, LOEX, Aile-R, 1401 18ième Rue, Quebec, Quebec, G1J 1Z4,
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Cantu DC, Padmaperuma AB, Nguyen MT, Akhade SA, Yoon Y, Wang YG, Lee MS, Glezakou VA, Rousseau R, Lilga MA. A Combined Experimental and Theoretical Study on the Activity and Selectivity of the Electrocatalytic Hydrogenation of Aldehydes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00858] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- David C. Cantu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Asanga B. Padmaperuma
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Manh-Thuong Nguyen
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Sneha A. Akhade
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Yeohoon Yoon
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Yang-Gang Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Mal-Soon Lee
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Vassiliki-Alexandra Glezakou
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Roger Rousseau
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
| | - Michael A. Lilga
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland Washington 99352, United States
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Novotny Z, Nguyen MT, Netzer FP, Glezakou VA, Rousseau R, Dohnálek Z. Formation of Supported Graphene Oxide: Evidence for Enolate Species. J Am Chem Soc 2018; 140:5102-5109. [DOI: 10.1021/jacs.7b12791] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zbynek Novotny
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Manh-Thuong Nguyen
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Falko P. Netzer
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University, A-8010 Graz, Austria
| | - Vassiliki-Alexandra Glezakou
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Roger Rousseau
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Zdenek Dohnálek
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
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Cosson E, Gary F, Nguyen MT, Bianchi L, Sandre-Banon D, Biri L, Jaber Y, Cussac-Pillegand C, Banu I, Chiheb S, Carbillon L, Valensi P. Gradual increase in advanced glycation end-products from no diabetes to early and regular gestational diabetes: A case-control study. Diabetes Metab 2018; 45:586-589. [PMID: 29402596 DOI: 10.1016/j.diabet.2018.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 01/05/2018] [Accepted: 01/06/2018] [Indexed: 10/18/2022]
Affiliation(s)
- E Cosson
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France; Unité de recherche épidémiologique nutritionnelle, UMR U1153 Inserm, U11125 Inra, CNAM, université Paris13, 93000 Bobigny, France.
| | - F Gary
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - M T Nguyen
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - L Bianchi
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - D Sandre-Banon
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - L Biri
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - Y Jaber
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - C Cussac-Pillegand
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - I Banu
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - S Chiheb
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - L Carbillon
- Department of gynecology-obstetrics, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
| | - P Valensi
- Department of endocrinology-diabetology-nutrition, CRNH-IdF, CINFO, Jean-Verdier hospital, Paris 13 university, AP-HP, 93143 Bondy cedex, France
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Nguyen MT, Wang Z, Rod KA, Childers MI, Fernandez C, Koech PK, Bennett WD, Rousseau R, Glezakou VA. Atomic Origins of the Self-Healing Function in Cement-Polymer Composites. ACS Appl Mater Interfaces 2018; 10:3011-3019. [PMID: 29284262 DOI: 10.1021/acsami.7b13309] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Motivated by recent advances in self-healing cement and epoxy polymer composites, we present a combined ab initio molecular dynamics and sum frequency generation (SFG) vibrational spectroscopy study of a calcium-silicate-hydrate/polymer interface. On stable, low-defect surfaces, the polymer only weakly adheres through coordination and hydrogen bonding interactions and can be easily mobilized toward defected surfaces. Conversely, on fractured surfaces, the polymer strongly anchors through ionic Ca-O bonds resulting from the deprotonation of polymer hydroxyl groups. In addition, polymer S-S groups are turned away from the cement-polymer interface, allowing for the self-healing function within the polymer. The overall elasticity and healing properties of these composites stem from a flexible hydrogen bonding network that can readily adapt to surface morphology. The theoretical vibrational signals associated with the proposed cement-polymer interfacial chemistry were confirmed experimentally by SFG vibrational spectroscopy.
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Affiliation(s)
- Manh-Thuong Nguyen
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Zheming Wang
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Kenton A Rod
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - M Ian Childers
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Carlos Fernandez
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Phillip K Koech
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Wendy D Bennett
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Roger Rousseau
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
| | - Vassiliki-Alexandra Glezakou
- Basic and Applied Molecular Foundations, Physical and Computational Sciences Directorate, ‡Energy and Environment Directorate, and §Geochemistry, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States
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Wong RJ, Nguyen MT, Trinh HN, Chan C, Huynh A, Ly MT, Nguyen HA, Nguyen KK, Torres S, Yang J, Liu B, Garcia RT, Bhuket T, Baden R, Levitt B, da Silveira E, Gish RG. Hepatitis B surface antigen loss and sustained viral suppression in Asian chronic hepatitis B patients: A community-based real-world study. J Viral Hepat 2017; 24:1089-1097. [PMID: 28581644 DOI: 10.1111/jvh.12736] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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] [Received: 03/14/2017] [Accepted: 05/09/2017] [Indexed: 12/19/2022]
Abstract
Community-based real-world outcomes on effectiveness of antiviral therapies for chronic hepatitis B virus (CHB) in Asians are limited. Whether hepatitis B surface antigen (HBsAg) loss correlates with undetectable virus and alanine aminotransferase (ALT) normalization on treatment or what predicts risk of seroreversion or detectable virus after stopping therapy is unclear. We aim to evaluate rates and predictors of HBsAg loss, seroconversion, ALT normalization and undetectable HBV DNA, including HBsAg seroreversion or re-emergence of HBV DNA among Asian CHB patients. We retrospectively evaluated 1072 CHB adults on antiviral therapy at two community gastroenterology clinics from 1997 to 2015. Rates of HBsAg loss, ALT normalization, achieving undetectable HBV DNA and developing surface antibody (anti-HBs) were stratified by HBeAg status. Following HBsAg loss, HBsAg seroreversion or re-emergence of detectable HBV DNA was analysed. With median treatment of 76.7 months, the overall rate of HBsAg loss was 4.58%, with similar HBsAg loss rates between HBeAg-positive and HBeAg-negative patients (4.44% vs 4.71%, P=.85) in a predominantly Asian population (98.1%). Among HBsAg loss patients, 33.3% developed anti-HBs, 95.8% achieved undetectable virus and 66.0% normalized ALT. No significant baseline or on-treatment predictors of HBsAg loss were observed. While six patients who achieved HBsAg loss had seroreversion with re-emergence of HBsAg positivity, viral load remained undetectable, demonstrating the sustainability of viral suppression. Among a large community-based real-world cohort of Asian CHB patients treated with antiviral therapy, rate of HBsAg loss was 4.58%. Despite only 33.3% of HBsAg loss patients achieving anti-HBs, nearly all patients achieved sustained undetectable virus.
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Affiliation(s)
- R J Wong
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - M T Nguyen
- Silicon Valley Research Institute, San Jose, CA, USA
| | - H N Trinh
- San Jose Gastroenterology, San Jose, CA, USA
| | - C Chan
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - A Huynh
- Silicon Valley Research Institute, San Jose, CA, USA
| | - M T Ly
- Silicon Valley Research Institute, San Jose, CA, USA
| | - H A Nguyen
- San Jose Gastroenterology, San Jose, CA, USA
| | - K K Nguyen
- San Jose Gastroenterology, San Jose, CA, USA
| | - S Torres
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - J Yang
- San Jose Gastroenterology, San Jose, CA, USA
| | - B Liu
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - R T Garcia
- San Jose Gastroenterology, San Jose, CA, USA
| | - T Bhuket
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - R Baden
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - B Levitt
- San Jose Gastroenterology, San Jose, CA, USA
| | | | - R G Gish
- Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University Medical Center, Stanford, CA, USA.,Hepatitis B Foundation, Doylestown, PA, USA
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45
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Affiliation(s)
- Manh-Thuong Nguyen
- Center
for Computational Physics, Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan Street, Hanoi 100000, Vietnam
| | - Pham Nam Phong
- School
of Engineering Physics, Hanoi University of Science and Technology, Hanoi 100000, Vietnam
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46
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Pham TA, Tran BV, Nguyen MT, Stöhr M. Chiral-Selective Formation of 1D Polymers Based on Ullmann-Type Coupling: The Role of the Metallic Substrate. Small 2017; 13:1603675. [PMID: 28121375 DOI: 10.1002/smll.201603675] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/16/2016] [Indexed: 05/24/2023]
Abstract
The chiral-selective formation of 1D polymers from a prochiral molecule, namely, 6,12-dibromochrysene in dependence of the type of metal surface is demonstrated by a combined scanning tunneling microscopy and density functional theory study. Deposition of the chosen molecule on Au(111) held at room temperature leads to the formation of a 2D porous molecular network. Upon annealing at 200 °C, an achiral covalently linked polymer is formed on Au(111). On the other hand, a chiral Cu-coordinated polymer is spontaneously formed upon deposition of the molecules on Cu(111) held at room temperature. Importantly, it is found that the chiral-selectivity determines the possibility of obtaining graphene nanoribbons (GNRs). On Au(111), upon annealing at 350 °C or higher cyclo-dehydrogenation occurs transforming the achiral polymer into a GNR. In contrast, the chiral coordination polymer on Cu(111) cannot be converted into a GNR.
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Affiliation(s)
- Tuan Anh Pham
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747, AG, Groningen, The Netherlands
| | - Bay V Tran
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747, AG, Groningen, The Netherlands
| | - Manh-Thuong Nguyen
- Center for Computational Physics, Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan St., Hanoi, Vietnam
| | - Meike Stöhr
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747, AG, Groningen, The Netherlands
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Affiliation(s)
- Manh-Thuong Nguyen
- Center for Computational Physics, Institute of Physics; Vietnam Academy of Science and Technology; 10 Dao Tan St. Hanoi Vietnam
| | - Pham Nam Phong
- School of Engineering Physics; Hanoi University of Science and Technology; Hanoi 100000 Vietnam
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Ulman K, Nguyen MT, Seriani N, Piccinin S, Gebauer R. A Unified Picture of Water Oxidation on Bare and Gallium Oxide-Covered Hematite from Density Functional Theory. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03162] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kanchan Ulman
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Manh-Thuong Nguyen
- Center
for Computational Physics, Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan Street, Hanoi, Vietnam
| | - Nicola Seriani
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Simone Piccinin
- CNR-IOM DEMOCRITOS, c/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
| | - Ralph Gebauer
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
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49
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Wong RJ, Nguyen MT, Trinh HN, Huynh A, Ly MT, Nguyen HA, Nguyen KK, Yang J, Garcia RT, Levitt B, da Silveira E, Gish RG. Community-based real-world treatment outcomes of sofosbuvir/ledipasvir in Asians with chronic hepatitis C virus genotype 6 in the United States. J Viral Hepat 2017; 24:17-21. [PMID: 27677786 DOI: 10.1111/jvh.12609] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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] [Received: 06/28/2016] [Accepted: 08/23/2016] [Indexed: 01/08/2023]
Abstract
Sofosbuvir/ledipasvir (SOF/LDV) is the first all-oral ribavirin-free treatment approved for chronic hepatitis C virus (HCV) genotype 6, offering a safe and highly efficacious treatment option. Large studies evaluating real-world outcomes of this regimen are lacking. We aim to evaluate real-world treatment outcomes for HCV genotype 6. A retrospective cohort study evaluated 65 adults (age ≥18) with chronic HCV genotype 6 treated with SOF/LDV without ribavirin at a community gastroenterology clinic in the United States from November 2014 to May 2016. Rates of undetectable virus at week 4 on treatment, at end of treatment (EOT) and SVR12 were stratified by the presence of cirrhosis and prior treatment (treatment naïve vs treatment experienced). Among 65 patients with chronic HCV genotype 6 treated with SOF/LDV (52.3% male, mean age 66.3 years [SD 9.7], 41.5% cirrhosis and 15.4% treatment experienced), 97.3% had undetectable virus at week 4 on treatment, 96.9% had undetectable virus at EOT and 95.3% achieved SVR12. SVR12 was 100% in females vs 91.2% in males, P=.096, and 92.3% in patients with cirrhosis vs 97.4% in those without cirrhosis, P=.347. Resistance testing of treatment failures was attempted but unsuccessful due to lack of conforming primers to define the possible resistance mutations. Among the largest U.S. community-based real-world cohort of Asian chronic HCV genotype 6 patients treated with all-oral SOF/LDV without ribavirin, SVR12 was similar to SVR12 reported in clinical trials, confirming the safety and effectiveness of this regimen and validating current HCV genotype 6 treatment guideline recommendations.
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Affiliation(s)
- R J Wong
- Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, CA, USA
| | - M T Nguyen
- Silicon Valley Research Institute, San Jose, CA, USA
| | - H N Trinh
- San Jose Gastroenterology, San Jose, CA, USA
| | - A Huynh
- Silicon Valley Research Institute, San Jose, CA, USA
| | - M T Ly
- Silicon Valley Research Institute, San Jose, CA, USA
| | - H A Nguyen
- San Jose Gastroenterology, San Jose, CA, USA
| | - K K Nguyen
- San Jose Gastroenterology, San Jose, CA, USA
| | - J Yang
- San Jose Gastroenterology, San Jose, CA, USA
| | - R T Garcia
- San Jose Gastroenterology, San Jose, CA, USA
| | - B Levitt
- San Jose Gastroenterology, San Jose, CA, USA
| | | | - R G Gish
- Division of Gastroenterology and Hepatology, Stanford Health Care, Stanford, CA, USA.,National Viral Hepatitis Roundtable, San Francisco, CA, USA
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50
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Pham TA, Song F, Nguyen MT, Li Z, Studener F, Stöhr M. Cover Picture: Comparing Ullmann Coupling on Noble Metal Surfaces: On-Surface Polymerization of 1,3,6,8-Tetrabromopyrene on Cu(111) and Au(111) (Chem. Eur. J. 17/2016). Chemistry 2016. [DOI: 10.1002/chem.201601012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tuan Anh Pham
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Fei Song
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Manh-Thuong Nguyen
- The Abdus Salam International Centre for Theoretical Physics; Strada Costiera, 11 34151 Trieste Italy
| | - Zheshen Li
- ISA, Department of Physics and Astronomy; University of Aarhus; 8000 Aarhus C Denmark
| | - Florian Studener
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Meike Stöhr
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
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