1
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Huo GF, Xu WT, Han Y, Zhu J, Hou X, Fan W, Ni Y, Wu S, Yang HB, Wu J. Expanded Azahelicenes with Large Dissymmetry Factors. Angew Chem Int Ed Engl 2024; 63:e202403149. [PMID: 38421194 DOI: 10.1002/anie.202403149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
Expanded azahelicenes, as heteroanalogues of helically chiral helicenes, hold significant potential for chiroptical materials. Nevertheless, their investigation and research have remained largely unexplored. Herein, we present the facile synthesis of a series of expanded azahelicenes NHn (n=1-5) consisting of 11, 19, 27, 35, and 43 fused rings, mainly by Suzuki coupling followed by Bi(OTf)3-mediated cyclization of vinyl ethers. The structures of NH2, NH3 and NH4 were confirmed through X-ray crystallography analysis, and their (P)- and (M)- enantiomers were also isolated with chiral high performance liquid chromatography. The enantiomers exhibit large absorption (abs) and luminescence (lum) dissymmetry factors, with |gabs|max=0.044; |glum|max=0.003 for NH2, |gabs|max=0.048; |glum|=0.014 for NH3, and |gabs|max=0.043; |glum|max=0.021 for NH4, which are superior to their respective all-carbon analogues.
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Affiliation(s)
- Gui-Fei Huo
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Wei-Tao Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Yi Han
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Jun Zhu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Xudong Hou
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Wei Fan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Yong Ni
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Shaofei Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
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2
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Zhu H, Yakobson BI. Creating chirality in the nearly two dimensions. NATURE MATERIALS 2024; 23:316-322. [PMID: 38388730 DOI: 10.1038/s41563-024-01814-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 01/18/2024] [Indexed: 02/24/2024]
Abstract
Structural chirality, defined as the lack of mirror symmetry in materials' atomic structure, is only meaningful in three-dimensional space. Yet two-dimensional (2D) materials, despite their small thickness, can show chirality that enables prominent asymmetric optical, electrical and magnetic properties. In this Perspective, we first discuss the possible definition and mathematical description of '2D chiral materials', and the intriguing physics enabled by structural chirality in van der Waals 2D homobilayers and heterostructures, such as circular dichroism, chiral plasmons and the nonlinear Hall effect. We then summarize the recent experimental progress and approaches to induce and control structural chirality in 2D materials from monolayers to superlattices. Finally, we postulate a few unique opportunities offered by 2D chiral materials, the synthesis and new properties of which can potentially lead to chiral optoelectronic devices and possibly materials for enantioselective photochemistry.
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Affiliation(s)
- Hanyu Zhu
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, USA.
| | - Boris I Yakobson
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, USA.
- Department of Chemistry, Rice University, Houston, TX, USA.
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3
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Han YX, Hu CL, Mao JG. Ca 2 Ln(BS 3 )(SiS 4 ) (Ln = La, Ce, and Gd): Mixed Metal Thioborate-Thiosilicates as Well-Performed Infrared Nonlinear Optical Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305828. [PMID: 37726242 DOI: 10.1002/smll.202305828] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/28/2023] [Indexed: 09/21/2023]
Abstract
The first examples of thioborate-thiosilicates, namely Ca2 Ln(BS3 )(SiS4 ) (Ln = La, Ce, and Gd), are synthesized by rationally designed high-temperature solid-state reactions. They crystalize in the polar space group P63 mc and feature a novel three-dimensional crystal structure in which the discrete [BS3 ]3- and [SiS4 ]4- anionic groups are linked by Ca2+ and Ln3+ cations occupying the same atomic site. Remarkably, all three compounds show comprehensive properties required as promising infrared nonlinear optical materials, including phase-matchable strong second harmonic generation (SHG) responses at 2.05 µm (1.1-1.2 times that of AgGaS2 ), high laser-induced damage thresholds (7-10 times that of AgGaS2 ), wide light transmission range (0.45-11 µm), high thermal stabilities (>800 °C), and large calculated birefringence (0.126-0.149 @1064 nm), which justify the material design strategy of combining [BS3 ]3- and [SiS4 ]4- active units. Theoretical calculations suggest that their large SHG effects originate mainly from the synergy effects of the LnS6 , BS3 , and SiS4 groups. This work not only broadens the scope of research on metal chalcogenides but also provides a new synthetic route for mixed anionic thioborates.
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Affiliation(s)
- Ya-Xiang Han
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Chun-Li Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Jiang-Gao Mao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
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4
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Tejendra B, Rajput SS, Alam MM. A Curious Case of Two-Photon Absorption in n-Helicene and n-Phenylene, n=6-10: Why n=7 is Different? Chemphyschem 2024; 25:e202300710. [PMID: 37936568 DOI: 10.1002/cphc.202300710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/09/2023]
Abstract
n-Helicenes and n-Phenylenes are interesting examples of twisted molecules, where although the atoms are connected through conjugated π ${\pi }$ -bonds, the π ${\pi }$ -conjugation is largely hindered by the twisted nature of the bonds. Such structures provide a unique opportunity to study the effect of twisted π ${\pi }$ -system on non-linear optical properties. In this work, we studied the two-photon absorption in donor-acceptor substituted n-helicenes and n-phenylenes employing the state-of-the-art RI-CC2 method and reported a unique feature we observed in n=7 systems. We found that both 7-helicene and 7-phenylene systems exhibit largest two-photon absorption than other members in their respective classes. Furthermore, using generalized few-state model, we provided a detailed microscopic mechanism of this unique observation involving participation of different transition dipole moment vectors and their relative orientations.
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Affiliation(s)
- Banana Tejendra
- Department of Chemistry, Indian Institute of Technology Bhilai, Kutelabhata, Durg, Chhattisgarh 491001, India
| | - Swati Singh Rajput
- Department of Chemistry, Indian Institute of Technology Bhilai, Kutelabhata, Durg, Chhattisgarh 491001, India
| | - M Mehboob Alam
- Department of Chemistry, Indian Institute of Technology Bhilai, Kutelabhata, Durg, Chhattisgarh 491001, India
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5
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Liu X, Zhu B, Zhang X, Zhu H, Zhang J, Chu A, Wang F, Wang R. Enantioselective synthesis of [4]helicenes by organocatalyzed intermolecular C-H amination. Nat Commun 2024; 15:732. [PMID: 38272928 PMCID: PMC10810882 DOI: 10.1038/s41467-024-45049-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024] Open
Abstract
Catalytic asymmetric synthesis of helically chiral molecules has remained an outstanding challenge and witnessed fairly limited progress in the past decades. Current methods to construct such compounds almost entirely rely on catalytic enantiocontrolled fused-ring system extension. Herein, we report a direct terminal peri-functionalization strategy, which allows for efficient assembling of 1,12-disubstituted [4]carbohelicenes via an organocatalyzed enantioselective amination reaction of 2-hydroxybenzo[c]phenanthrene derivates with diazodicarboxamides. The key feature of this approach is that the stereochemical information of the catalyst could be transferred into not only the helix sense but also the remote C-N axial chirality of the products, thus enabling the synthesis of [4]- and [5]helicenes with both structural diversity and stereochemical complexity in good efficiency and excellent enantiocontrol. Besides, the large-scale preparations and representative transformations of the helical products further demonstrate the practicality of this protocol. Moreover, DFT calculations reveal that both the hydrogen bonds and the C-H---π interactions between the substrates and catalyst contribute to the ideal stereochemical control.
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Affiliation(s)
- Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
| | - Boyan Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Xiaoyong Zhang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, 518107, Shenzhen, China
| | - Hanwen Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Jingying Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Anqi Chu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Fujun Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
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6
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David AG, Mañas-Torres MC, Codesal MD, López-Sicilia I, Martín-Romero MT, Camacho L, Cuerva JM, Blanco V, Giner-Casares JJ, Álvarez de Cienfuegos L, Campaña AG. Supramolecular Large Nanosheets Assembled at Air/Water Interfaces and in Solution from Amphiphilic Heptagon-Containing Nanographenes. J Org Chem 2024; 89:163-173. [PMID: 38087461 PMCID: PMC10777395 DOI: 10.1021/acs.joc.3c01854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/07/2023] [Accepted: 11/28/2023] [Indexed: 01/06/2024]
Abstract
We report the synthesis of a new set of amphiphilic saddle-shaped heptagon-containing polycyclic aromatic hydrocarbons (PAHs) functionalized with tetraethylene glycol chains and their self-assembly into large two-dimensional (2D) polymers. An in-depth analysis of the self-assembly mechanism at the air/water interface has been carried out, and the proposed arrangement models are in good agreement with the molecular dynamics simulations. Quite remarkably, the number and disposition of the tetraethylene glycol chains significantly influence the disposition of the PAHs at the interface and conditionate their packing under pressure. For the three compounds studied, we observed three different behaviors in which the aromatic core is parallel, perpendicular, and tilted with respect to the water surface. We also show that these curved PAHs are able to self-assemble in solution into remarkably large sheets of up to 150 μm2. These results show the relationship, within a family of curved nanographenes, between the monomer configuration and their self-assembly capacity in air/water interfaces and organic-water mixtures.
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Affiliation(s)
- Arthur
H. G. David
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Mari C. Mañas-Torres
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Marcos D. Codesal
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Irene López-Sicilia
- Departamento
de Química Física y T. Aplicada, Instituto Químico
para la Energía y Medioambiente IQUEMA, Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - María T. Martín-Romero
- Departamento
de Química Física y T. Aplicada, Instituto Químico
para la Energía y Medioambiente IQUEMA, Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Luis Camacho
- Departamento
de Química Física y T. Aplicada, Instituto Químico
para la Energía y Medioambiente IQUEMA, Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Juan M. Cuerva
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Victor Blanco
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Juan J. Giner-Casares
- Departamento
de Química Física y T. Aplicada, Instituto Químico
para la Energía y Medioambiente IQUEMA, Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Luis Álvarez de Cienfuegos
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
| | - Araceli G. Campaña
- Departamento
de Química Orgánica, Facultad de Ciencias, Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuente Nueva, s/n, 18071 Granada, Spain
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7
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Rodríguez R, Naranjo C, Kumar A, Dhbaibi K, Matozzo P, Camerel F, Vanthuyne N, Gómez R, Naaman R, Sánchez L, Crassous J. Weakly Self-Assembled [6]Helicenes: Circularly Polarized Light and Spin Filtering Properties. Chemistry 2023; 29:e202302254. [PMID: 37635073 DOI: 10.1002/chem.202302254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/21/2023] [Accepted: 08/26/2023] [Indexed: 08/29/2023]
Abstract
Self-assembling features, chiroptical activity, and spin filtering properties are reported for 2,15- and 4,13-disubstituted [6]helicenes decorated in their periphery with 3,4,5-tris(dodecyloxy)-N-(4-ethynylphenyl)benzamide moieties. The weak non-covalent interaction between these units conditions the corresponding circularly polarized luminescence and spin polarization. The self-assembly is overall weak for these [6]helicene derivatives that, despite the formation of H-bonding interactions between the amide groups present in the peripheral moieties, shows very similar chiroptical properties both in the monomeric or aggregated states. This effect could be explained by considering the steric effect that these groups could generate in the growing of the corresponding aggregate formed. Importantly, the self-assembling features also condition chiral induced spin selectivity (CISS effect), with experimental spin polarization (SP) values found between 35-40 % for both systems, as measured by magnetic-conducting atomic force microscopy (AFM) technique.
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Affiliation(s)
- Rafael Rodríguez
- Institut des Sciences Chimiques de Rennes, University of Rennes, CNRS, ISCR, UMR 6226, F-35000, Rennes, France
| | - Cristina Naranjo
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Anil Kumar
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Kais Dhbaibi
- Institut des Sciences Chimiques de Rennes, University of Rennes, CNRS, ISCR, UMR 6226, F-35000, Rennes, France
| | - Paola Matozzo
- Institut des Sciences Chimiques de Rennes, University of Rennes, CNRS, ISCR, UMR 6226, F-35000, Rennes, France
| | - Franck Camerel
- Institut des Sciences Chimiques de Rennes, University of Rennes, CNRS, ISCR, UMR 6226, F-35000, Rennes, France
| | - Nicolas Vanthuyne
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, Marseille, 13397, France
| | - Rafael Gómez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Ron Naaman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Luis Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Jeanne Crassous
- Institut des Sciences Chimiques de Rennes, University of Rennes, CNRS, ISCR, UMR 6226, F-35000, Rennes, France
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8
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Freixas VM, Rouxel JR, Nam Y, Tretiak S, Govind N, Mukamel S. X-ray and Optical Circular Dichroism as Local and Global Ultrafast Chiral Probes of [12]Helicene Racemization. J Am Chem Soc 2023; 145:21012-21019. [PMID: 37704187 DOI: 10.1021/jacs.3c07032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Chirality is a fundamental molecular property that plays a crucial role in biophysics and drug design. Optical circular dichroism (OCD) is a well-established chiral spectroscopic probe in the UV-visible regime. Chirality is most commonly associated with a localized chiral center. However, some compounds such as helicenes (Figure 1) are chiral due to their screwlike global structure. In these highly conjugated systems, some electric and magnetic allowed transitions are distributed across the entire molecule, and OCD thus probes the global molecular chirality. Recent advances in X-ray sources, in particular the control of their polarization and spatial profiles, have enabled X-ray circular dichroism (XCD), which, in contrast to OCD, can exploit the localized and element-specific nature of X-ray electronic transitions. XCD therefore is more sensitive to local structures, and the chirality probed with it can be referred to as local. During the racemization of helicene, between opposite helical structures, the screw handedness can flip locally, making the molecule globally achiral while retaining a local handedness. Here, we use the racemization mechanism of [12]helicene as a model to demonstrate the capabilities of OCD and XCD as time-dependent probes for global and local chiralities, respectively. Our simulations demonstrate that XCD provides an excellent spectroscopic probe for the time-dependent local chirality of molecules.
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Affiliation(s)
- Victor M Freixas
- Department of Chemistry and Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
| | - Jérémy R Rouxel
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yeonsig Nam
- Department of Chemistry and Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Niranjan Govind
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Shaul Mukamel
- Department of Chemistry and Physics and Astronomy, University of California, Irvine, California 92697-2025, United States
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9
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Electronic Structures and NLO Properties of a Series of TMDs Lateral‐Core–Shell Heterostructures Quantum Dots. ADVANCED THEORY AND SIMULATIONS 2023. [DOI: 10.1002/adts.202200791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Kiel GR, Bergman HM, Samkian AE, Schuster NJ, Handford RC, Rothenberger AJ, Gomez-Bombarelli R, Nuckolls C, Tilley TD. Expanded [23]-Helicene with Exceptional Chiroptical Properties via an Iterative Ring-Fusion Strategy. J Am Chem Soc 2022; 144:23421-23427. [PMID: 36525313 DOI: 10.1021/jacs.2c09555] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Expanded helicenes are an emerging class of helical nanocarbons composed of alternating linear and angularly fused rings, which give rise to an internal cavity and a large diameter. The latter is expected to impart exceptional chiroptical properties, but low enantiomerization free energy barriers (ΔG‡e) have largely precluded experimental interrogation of this prediction. Here, we report the syntheses of expanded helicenes containing 15, 19, and 23 rings on the inner helical circuit, using two iterations of an Ir-catalyzed, site-selective [2 + 2 + 2] reaction. This series of compounds displays a linear relationship between the number of rings and ΔG‡e. The expanded [23]-helicene, which is 7 rings longer than any known single carbohelicene and among the longest known all-carbon ladder oligomers, exhibits a ΔG‡e that is high enough (29.2 ± 0.1 kcal/mol at 100 °C in o-DCB) to halt enantiomerization at ambient temperature. This enabled the isolation of enantiopure samples displaying circular dichroism dissymmetry factors of ±0.056 at 428 nm, which are ≥1.7× larger than values for previously reported classical and expanded helicenes. Computational investigations suggest that this improved performance is the result of both the increased diameter and length of the [23]-helicene, providing guiding design principles for high dissymmetry molecular materials.
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Affiliation(s)
- Gavin R Kiel
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Harrison M Bergman
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Adrian E Samkian
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Nathaniel J Schuster
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Rex C Handford
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - August J Rothenberger
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Rafael Gomez-Bombarelli
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - T Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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11
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Huizi-Rayo U, Gastearena X, Ortuño AM, Cuerva JM, Rodríguez-Diéguez A, García JA, Ugalde J, Seco JM, Sebastian ES, Cepeda J. Influence of Tartrate Ligand Coordination over Luminescence Properties of Chiral Lanthanide-Based Metal-Organic Frameworks. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3999. [PMID: 36432285 PMCID: PMC9692916 DOI: 10.3390/nano12223999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
The present work reports on a detailed discussion about the synthesis, characterization, and luminescence properties of three pairs of enantiopure 3D metal-organic frameworks (MOFs) with general formula {[Ln2(L/D-tart)3(H2O)2]·3H2O}n (3D_Ln-L/D, where Ln = Sm(III), Eu(III) or Gd(III), and L/D-tart = L- or D-tartrate), and ten pairs of enantiopure 2D coordination polymers (CPs) with general formula [Ln(L/D-Htart)2(OH)(H2O)2]n (2D_Ln-L/D, where Ln = Y(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III) or Yb(III), and L/D-Htart = hydrogen L- or D-tartrate) based on single-crystal X-ray structures. Enantiopure nature of the samples has been further corroborated by Root Mean Square Deviation (RMSD) as well as by circular dichroism (CD) spectra. Solid-state emission spectra of Eu(III), Tb(III), and Dy(III)-based compounds confirm the occurrence of ligand-to-metal charge transfers in view of the characteristic emissions for these lanthanide ions, and emission decay curves were also recorded to estimate the emission lifetimes for the reported compounds. A complete theoretical study was accomplished to better understand the energy transfers occurring in the Eu-based counterparts, which allows for explaining the different performances of 3D-MOFs and 2D-layered compounds. As inferred from the colorimetric diagrams, emission characteristics of Eu-based 2D CPs depend on the temperature, so their luminescent thermometry has been determined on the basis of a ratiometric analysis between the ligand-centered and Eu-centered emission. Finally, a detailed study of the polarized luminescence intensity emitted by the samples is also accomplished to support the occurrence of chiro-optical activity.
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Affiliation(s)
- Uxua Huizi-Rayo
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, Spain
| | - Xuban Gastearena
- Departament of Applied Chemistry, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 Donostia, Spain
| | - Ana M. Ortuño
- Department of Organic Chemistry, UEQ, C/Severo Ochoa s/n, University of Granada, 18071 Granada, Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry, UEQ, C/Severo Ochoa s/n, University of Granada, 18071 Granada, Spain
| | - Antonio Rodríguez-Diéguez
- Department of Inorganic Chemistry, UEQ, C/Severo Ochoa s/n, University of Granada, 18071 Granada, Spain
| | - Jose Angel García
- Departament of Physics, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain
| | - Jesus Ugalde
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, Spain
| | - Jose Manuel Seco
- Departament of Applied Chemistry, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 Donostia, Spain
| | - Eider San Sebastian
- Departament of Applied Chemistry, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 Donostia, Spain
| | - Javier Cepeda
- Departament of Applied Chemistry, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 Donostia, Spain
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12
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Xiao X, Cheng Q, Bao ST, Jin Z, Sun S, Jiang H, Steigerwald ML, Nuckolls C. Single-Handed Helicene Nanoribbons via Transfer of Chiral Information. J Am Chem Soc 2022; 144:20214-20220. [DOI: 10.1021/jacs.2c09288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Xiao Xiao
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Qian Cheng
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Si Tong Bao
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Zexin Jin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shantao Sun
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Haoyu Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | | | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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13
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Modulation of the Second Order Nonlinear Optical Properties of Helical Graphene Nanoribbons Through Introducing Azulene Defects or/and BN Units. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-021-1213-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Chen J, Yang Z, Zhu G, Fu E, Li P, Chen F, Yu C, Wang S, Zhang S. Heterochiral Diastereomer-Discriminative Diphanes That Form Hierarchical Superstructures with Nonlinear Optical Properties. JACS AU 2022; 2:1661-1668. [PMID: 35911451 PMCID: PMC9327085 DOI: 10.1021/jacsau.2c00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In order to study the emergence of homochirality during complex molecular systems, most works mainly concentrated on the resolution of a pair of enantiomers. However, the preference of homochiral over heterochiral isomers has been overlooked, with very limited examples focusing only on noncovalent interactions. We herein report on diastereomeric discrimination of twin-cavity cages (denoted as diphanes) against heterochiral tris-(2-aminopropyl)amine (TRPN) bearing triple stereocenters. This diastereomeric selectivity results from distinct spatial orientation of reactive secondary amines on TRPN. Homochiral TRPNs with all reactive moieties rotating in the same way facilitate the formation of homochiral and achiral meso diphanes with low strain energy, while heterochiral TRPNs with uneven orientation of secondary amines preclude the formation of cage-like entity, since the virtual diphanes exhibit considerably high strain. Moreover, homochiral diphanes self-assemble into an acentric superstructure composed of single-handed helices, which exhibits interesting nonlinear optical behavior. Such a property is a unique occurrence for organic cages, which thus showcases their potential to spawn novel materials with interesting properties and functions.
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Affiliation(s)
- Jiaolong Chen
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhenyu Yang
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Gucheng Zhu
- Key
Laboratory of Artificial Structures and Quantum Control (Ministry
of Education), Shenyang National Laboratory for Materials Science,
School of Physics and Astronomy, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Enguang Fu
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Pan Li
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Fangyi Chen
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Chunyang Yu
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shiyong Wang
- Key
Laboratory of Artificial Structures and Quantum Control (Ministry
of Education), Shenyang National Laboratory for Materials Science,
School of Physics and Astronomy, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shaodong Zhang
- School
of Chemistry and Chemical Engineering, Shanghai
Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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15
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Gong X, Li C, Cai Z, Wan X, Qian H, Yang G. Synthesis of Nitrogen-Doped Aza-Helicenes with Chiral Optical Properties. J Org Chem 2022; 87:8406-8412. [PMID: 35730543 DOI: 10.1021/acs.joc.2c00371] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aza-helicenes are one of the most important series of heterohelicenes; herein, a series of novel aza-helicenes (5H, 6H, 6S, and 8S) were prepared via Bischler-Napieralski cyclization, and the interconversion dynamic process of these aza-helicenes was revealed using density functional theory calculations. The novel nitrogen-doped [6]helicene (6H) possesses a very high interconversion energy barrier of 36.0 kcal/mol. Two enantiomers of 6H were successfully resolved by high-performance liquid chromatography and showed desired chiral optical properties. 6H with chiral optical activity and lone electrons can be a potential candidate for chiral switches, which was demonstrated using the UV and circular dichroism spectra obtained upon titration with an acid and a base.
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Affiliation(s)
- Xue Gong
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Chunmei Li
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Zhixiong Cai
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Xuejuan Wan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Haixia Qian
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Guanghui Yang
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
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16
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Gulevskaya AV, Tonkoglazova DI. Alkyne‐based syntheses of carbo‐ and heterohelicenes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Beránek T, Jakubec M, Sýkora J, Císařová I, Žádný J, Storch J. Synthesis of 2-Phospha[7]helicene, a Helicene with a Terminal Phosphinine Ring. Org Lett 2022; 24:4756-4761. [PMID: 35748535 DOI: 10.1021/acs.orglett.2c01723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic strategy toward phosphahelicenes containing a terminal phosphinine ring has been explored. The 4-phenyl-6-methyl-2-phospha[7]helicene was prepared from starting 2-bromobenzo[c]phenanthrene in 12% overall yield in 12 steps. The synthetic approach involves introduction of the phosphorus function prior to photocyclization forming the final helicene skeleton, followed by the formation of a phosphorus hexacycle. The structure of the first phosphahelicene with a terminal phosphinine ring was confirmed by X-ray crystallography.
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Affiliation(s)
- Tomáš Beránek
- Institute of Chemical Process Fundamentals, v.v.i., The Czech Academy of Sciences, Rozvojová 1/135, 165 02 Prague 6, Czech Republic
| | - Martin Jakubec
- Institute of Chemical Process Fundamentals, v.v.i., The Czech Academy of Sciences, Rozvojová 1/135, 165 02 Prague 6, Czech Republic
| | - Jan Sýkora
- Institute of Chemical Process Fundamentals, v.v.i., The Czech Academy of Sciences, Rozvojová 1/135, 165 02 Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jaroslav Žádný
- Institute of Chemical Process Fundamentals, v.v.i., The Czech Academy of Sciences, Rozvojová 1/135, 165 02 Prague 6, Czech Republic
| | - Jan Storch
- Institute of Chemical Process Fundamentals, v.v.i., The Czech Academy of Sciences, Rozvojová 1/135, 165 02 Prague 6, Czech Republic
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18
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Chen F, Melle-Franco M, Mateo-Alonso A. Planar and Helical Dinaphthophenazines. J Org Chem 2022; 87:7635-7642. [PMID: 35616330 PMCID: PMC9207929 DOI: 10.1021/acs.joc.2c00129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we report the synthesis of a series of planar and helical dinaphthophenazines by cyclocondensation reactions between the newly developed 9,10-bis((triisopropylsilyl)ethynyl)anthracene-1,2-dione and different diamines. Their optoelectronic and electrochemical properties are studied by ultraviolet-visible (UV-vis) spectroscopy, fluorescence spectroscopy, cyclic voltammetry, and density functional theory calculations.
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Affiliation(s)
- Fengkun Chen
- POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, 20018 Donostia-San Sebastian, Spain
| | - Manuel Melle-Franco
- Department of Chemistry, CICECO─Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Aurelio Mateo-Alonso
- POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, 20018 Donostia-San Sebastian, Spain.,Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
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19
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Rodríguez R, Naranjo C, Kumar A, Matozzo P, Das TK, Zhu Q, Vanthuyne N, Gómez R, Naaman R, Sánchez L, Crassous J. Mutual Monomer Orientation To Bias the Supramolecular Polymerization of [6]Helicenes and the Resulting Circularly Polarized Light and Spin Filtering Properties. J Am Chem Soc 2022; 144:7709-7719. [PMID: 35404592 PMCID: PMC9073930 DOI: 10.1021/jacs.2c00556] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
We
report on the synthesis and self-assembly of 2,15- and 4,13-disubstituted
carbo[6]helicenes 1 and 2 bearing 3,4,5-tridodecyloxybenzamide
groups. The self-assembly of these [6]helicenes is strongly influenced
by the substitution pattern in the helicene core that affects the
mutual orientation of the monomeric units in the aggregated form.
Thus, the 2,15-substituted derivative 1 undergoes an
isodesmic supramolecular polymerization forming globular nanoparticles
that maintain circularly polarized light (CPL) with glum values as high as 2 × 10–2.
Unlike carbo[6]helicene 1, the 4,13-substituted derivative 2 follows a cooperative mechanism generating helical one-dimensional
fibers. As a result of this helical organization, [6]helicene 2 exhibits a unique modification in its ECD spectral pattern
showing sign inversion at low energy, accompanied by a sign change
of the CPL with glum values of 1.2 ×
10–3, thus unveiling an example of CPL inversion
upon supramolecular polymerization. These helical supramolecular structures
with high chiroptical activity, when deposited on conductive surfaces,
revealed highly efficient electron-spin filtering abilities, with
electron spin polarizations up to 80% for 1 and 60% for 2, as measured by magnetic conducting atomic force microscopy.
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Affiliation(s)
- Rafael Rodríguez
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Cristina Naranjo
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Anil Kumar
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Paola Matozzo
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Tapan Kumar Das
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Qirong Zhu
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Nicolas Vanthuyne
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2, UMR 7313, Marseille 13397, France
| | - Rafael Gómez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Ron Naaman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Luis Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Jeanne Crassous
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
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20
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Synthesis of Functionalized Six-Membered-Ring Azahelicenes. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27082522. [PMID: 35458720 PMCID: PMC9028320 DOI: 10.3390/molecules27082522] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 11/23/2022]
Abstract
Functionalization, namely the introduction of side groups onto the molecular scaffold of a helicene, may have either the purpose of modifying the electronic properties of the parent helicene, e.g., by adding electron-withdrawing or electron-donating groups, or the scope of providing the helicene with a “handle”, which can be reacted to bind the molecule to another molecule or to a solid structure, such as a carbon or metal surface, or again to allow for complexation of the helicene with metal ions. The possible approaches are two-fold: the synthesis of the helicene can be performed using starting materials that already contain a side group, or the side group can be introduced after the synthesis of the parent helicene. As azahelicenes are helicenes bearing one or more nitrogen atom(s) in the molecular framework, parent azahelicenes can be functionalized on carbon atoms by exploiting the presence of the electron-withdrawing nitrogen atom. Moreover, they can be transformed into quaternary salts, whose properties are quite different from those of the parent azahelicenes in terms of the solubility and electronic properties. This review aims to provide a survey of the different synthetic methods available to attain this fascinating class of compounds.
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21
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Tonkoglazova DI, Oryabinskaya LM, Shcherbatykh AA, Gulevskaya AV. The synthesis and crystal structure of pH-sensitive fluorescent pyrene-based double aza- and diaza[4]helicenes. Org Biomol Chem 2022; 20:2704-2714. [PMID: 35293927 DOI: 10.1039/d2ob00204c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Novel pyrene-based double aza- and diaza[4]helicenes have been prepared through a five-step synthetic sequence in overall good yields. Commercially available 2,3-dihaloazines (2,3-dibromopyridine, 2,3-dichloropyrazine and 2,3-dichloroquinoxaline) were used as starting materials. The synthesis employs electrophile-induced cyclizations of ortho-alkynyl bihetaryls as the key steps, leading to the formation of a helical skeleton. To discern the effect of merging azine and pyrene moieties within a helical skeleton, the X-ray structures, UV-vis absorption and fluorescence spectra of the helicenes were investigated and compared with those of the parent [4]helicene, aza- and diaza[4]helicenes. It was found that the emission properties of the synthesized helicenes can be modulated as a function of pH. The basicity of pyrene-based double aza[4]helicenes was estimated by the direct fluorimetric titration method; the pKa value was found to be equal to 1.4.
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Affiliation(s)
- Daria I Tonkoglazova
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Lyubov M Oryabinskaya
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Aleksandr A Shcherbatykh
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Anna V Gulevskaya
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
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22
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Kawano SI, Narita K, Ikemoto Y, Sasaki A, Tanaka K. Mesogenic discrete metallofoldamer for columnar liquid crystal. Chem Commun (Camb) 2022; 58:3274-3277. [PMID: 35175273 DOI: 10.1039/d2cc00310d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A mesogenic metallofoldamer [(1R,R-Ni)2Pd] exhibits thermotropic columnar liquid crystalline properties. The metallofoldamer was prepared from two homochiral crescent-shaped precursors having β-diketonate ligands (1R,R-Ni) through bridging by metal complexation; it exhibited a single helicity owing to the overlapping of both ends. The precursor and metallofoldamer formed similar hexagonal columnar phases. The helical metallofoldamer exhibited the hexagonal columnar phase at the higher temperature range owing to its rigid helical mesogenic structure.
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Affiliation(s)
- Shin-Ichiro Kawano
- Department of Chemistry, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan.
| | - Kazutaka Narita
- Department of Chemistry, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan.
| | - Yuka Ikemoto
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Ako Sasaki
- Department of Chemistry, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan.
| | - Kentaro Tanaka
- Department of Chemistry, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan.
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23
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Hua XN, Zhang WY, Shi PP. Two-step nonlinear optical switch in a hydrogen-bonded perovskite-type crystal. Chem Commun (Camb) 2022; 58:1712-1715. [PMID: 35023514 DOI: 10.1039/d1cc06306e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Switchable nonlinear optical (NLO) materials have aroused broad interest on account of their captivating optical and electronic properties. We demonstrate a novel perovskite-type crystal with exceptional hydrogen bond interactions that are associated with the onset of reorientational motions of organic cations and thus induce the occurrence of two successive phase transitions to be a two-step NLO switch. This finding affords an alternative approach for the design and assembly of switchable NLO materials.
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Affiliation(s)
- Xiu-Ni Hua
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China.
| | - Wan-Ying Zhang
- School of Science, Bengbu University, Bengbu, 233030, P. R. China.
| | - Ping-Ping Shi
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China.
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24
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Bracciale MP, Kwon G, Ho D, Kim C, Santarelli ML, Marrocchi A. Synthesis, Characterization, and Thin-Film Transistor Response of Benzo[i]pentahelicene-3,6-dione. Molecules 2022; 27:863. [PMID: 35164123 PMCID: PMC8840029 DOI: 10.3390/molecules27030863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 12/16/2022] Open
Abstract
Organic semiconductors hold the promise of simple, large area solution deposition, low thermal budgets as well as compatibility with flexible substrates, thus emerging as viable alternatives for cost-effective (opto)-electronic devices. In this study, we report the optimized synthesis and characterization of a helically shaped polycyclic aromatic compound, namely benzo[i]pentahelicene-3,6-dione, and explored its use in the fabrication of organic field effect transistors. In addition, we investigated its thermal, optical absorption, and electrochemical properties. Finally, the single crystal X-ray characterization is reported.
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Affiliation(s)
- Maria Paola Bracciale
- Department of Chemical Engineering Materials and Environment, University of Rome “Sapienza”, Via Eudossiana 18, 00184 Rome, Italy;
| | - Guhyun Kwon
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Korea; (G.K.); (D.H.); (C.K.)
| | - Dongil Ho
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Korea; (G.K.); (D.H.); (C.K.)
| | - Choongik Kim
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Korea; (G.K.); (D.H.); (C.K.)
| | - Maria Laura Santarelli
- Department of Chemical Engineering Materials and Environment, University of Rome “Sapienza”, Via Eudossiana 18, 00184 Rome, Italy;
| | - Assunta Marrocchi
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
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25
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Uematsu K, Hayasaka C, Takase K, Noguchi K, Nakano K. Transformation of Thia[7]helicene to Aza[7]helicenes and [7]Helicene-like Compounds via Aromatic Metamorphosis. Molecules 2022; 27:molecules27030606. [PMID: 35163875 PMCID: PMC8839769 DOI: 10.3390/molecules27030606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 11/27/2022] Open
Abstract
[n]Helicenes with helically twisted structures have attracted increasing interest owing to their unique properties. Therefore, it has been an important issue to develop facile synthetic methodologies which allow access to a variety of [n]helicenes. Here we report the synthesis of [7]helicenes and [7]helicene-like compounds from the thia[7]helicene as a common starting material. Desulfurative dilithiation of the thia[7]helicene and the subsequent reaction with silicon and phosphorus electrophiles afforded the silole- and phosphole-fused [7]helicene-like compounds, respectively. The cyclopentadiene-fused [7]helicene-like compound and the pyrrole-fused aza[7]helicenes were also successfully synthesized via twofold SNAr reactions of the thia[7]helicene S,S-dioxide with the carbon and nitrogen nucleophiles, respectively. The thia[7]helicene S,S-dioxide showed a slightly red-shifted absorption spectrum than the parent thia[7]helicene, which was well demonstrated by the theoretical calculations. The substituents on the silicon atom of silole-fused [7]helicene-like compounds have little impact on the longest absorption maximum. Such little effect of the substituents on absorption properties was also observed for cyclopentadiene-fused [7]helicene-like compounds and aza[7]helicenes and was well demonstrated by the theoretical calculations. The thia[7]helicene S,S-dioxide and the silole-fused [7]helicene-like compound exhibited bright blue emission, and the cyclopentadiene-fused [7]helicene-like compound and the aza[7]helicenes showed strong violet emission. Each single enantiomer of the aza[7]helicenes showed circularly-polarized luminescence with the dissymmetry factors of 4.2~4.4 × 10−3.
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Affiliation(s)
- Keisuke Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Chikara Hayasaka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Ko Takase
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Keiichi Noguchi
- Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan;
| | - Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
- Correspondence: ; Tel.: +81-42-388-7162
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26
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Furuta T, Inoue T, Hamada S, Nakamura R, Sasamori T. Synthesis of Amide-Functionalized Thia[7]helicene-Like Molecule and Its Supramolecular Assembly in the Solid State. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Karak P, Choudhury J. Conformationally flexible heterohelicenes as stimuli-controlled soft molecular springs. Chem Sci 2022; 13:11163-11173. [PMID: 36320460 PMCID: PMC9517708 DOI: 10.1039/d2sc04006a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/31/2022] [Indexed: 11/21/2022] Open
Abstract
Structurally engineered molecules which can behave as stimuli-controlled mechanical nanomachines such as molecular shuttles, rotors, ratchets, and springs are important in several research areas, including molecular robotics, actuation, sensing, cargo transportation, etc. Helicenes, by virtue of their unique screw-type structures, were proposed as functional models for molecular springs; however, experimental realization has remained an elusive and unmet task until now, because of the lack of appropriate helicene molecules consisting of backbone-decorated dynamic architectures. Aiming to explore this unearthed direction, we present herein a novel class of modular flexible heterohelicenes with a stimuli (acid/base and light)-responsive core and peripheral modules. By applying pH (at core-embedded free imidazole sites) and light (at backbone-tethered dithienylethene units) stimuli, we demonstrate that these flexible heterohelicenes exhibit spring-like movement, with the reversible contraction/extension of the helical pitch. The uniquely functionalized structure of these molecules played a critical role in bestowing such capability, as revealed by crystallographic, spectroscopic and computational data. Careful assessment disclosed that the protonation/deprotonation-induced reversible generation and delocalization of positive charge throughout the π-conjugated helical rim switch the operative interactions between the π clouds of the terminal overlapping arene rings of the helicenes between repulsive and attractive, leading to extension/contraction of the helical pitch. On the other hand, in the case of the light stimulus, it was analyzed that the light-induced ring-closure of the photoactive dithienylethene units created a geometric distortion causing the helicenic wings to bend outward from the helicene rim, which resulted in extension of the helical pitch. The photo-assisted (or thermal) reverse ring-opening reaction converted the system to its original conformation, thus enabling the helicene molecule to display spring-like reversible extension/contraction motion. The new insights on the reversible dynamic features of this class of heterohelicenes under the influence of external stress would guide crucial design principles of helicene-based molecular springs for potential applications. Sub-expanded flexible heterohelicenes were configured through a modular synthetic approach to experimentally demonstrate their capability of stimuli-controlled soft molecular spring-like behavior.![]()
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Affiliation(s)
- Pirudhan Karak
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India
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28
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Hindered Tetraphenylethylene Helicates: Chiral Fluorophores with Deep‐Blue Emission, Multiple‐Color CPL, and Chiral Recognition Ability. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202115216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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29
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Hu M, Ye FY, Du C, Wang W, Yu W, Liu M, Zheng YS. Hindered Tetraphenylethylene Helicates: Chiral Fluorophores with Deep-Blue Emission, Multiple-Color CPL, and Chiral Recognition Ability. Angew Chem Int Ed Engl 2021; 61:e202115216. [PMID: 34904350 DOI: 10.1002/anie.202115216] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Indexed: 01/18/2023]
Abstract
New hindered tetraphenylethylene (TPE) helicates with substitution at 2,6-position of phenyl rings were designed and synthesized. Due to the increased hindrance, the TPE helicates emit strong deep-blue to violet fluorescence both in the solid state and in solution, and could be resolved into enantiomers that emit strong and multicolor circularly polarized luminescence (CPL), and exhibit a high enantioselective recognition of chiral tartaric acid and its derivatives. Surprisingly, the derived helicate tetramines possess amino groups with an unpredented planar structure and sp2 -hybridized nitrogen, arousing the change between AIE effect and ACQ phenomenon through photoinduced electron transfer (PET). With advantages of short synthetic route, many modification positions, deep-blue to violet emission, wide CPL tuning, and high chiral recognition ability, the hindered TPE helicates show broad prospects as chiral materials.
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Affiliation(s)
- Ming Hu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Feng-Ying Ye
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Cong Du
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Weizhou Wang
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, China
| | - Wei Yu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Minghua Liu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yan-Song Zheng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
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30
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Medel MA, Cruz CM, Miguel D, Blanco V, Morcillo SP, Campaña AG. Chiral Distorted Hexa-peri-hexabenzocoronenes Bearing a Nonagon-Embedded Carbohelicene. Angew Chem Int Ed Engl 2021; 60:22051-22056. [PMID: 34329498 PMCID: PMC8518755 DOI: 10.1002/anie.202109310] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Indexed: 01/29/2023]
Abstract
A new family of chiral saddle-helix hybrid nanographenes is reported. The first hexa-peri-hexabenzocoronene (HBC) analogues bearing a nine-membered carbocycle are presented. Furthermore, for the first time, π-extended carbo[n]helicenes containing a nine-membered ring as part of the helical moiety have been synthesized. The combination of a [5]helicene moiety and a nonagon ring in a single chiral motif induces a tremendous distortion from planarity into the nanographenic structures compared to other saddle-helix hybrids such as heptagon- and octagon-containing π-extended carbo[5]helicenes. In fact, the interplanar angle of the two terminal rings reaches the largest angle (134.8°) of a carbohelicene reported to date, thus being by far the most twisted helicene yet prepared. Photophysical properties evaluation showed improved absorption dissymmetry factors (|gabs |=4.2×10-3 ) in the new family of nonagon-containing π-extended carbo[5]helicenes.
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Affiliation(s)
- Miguel A. Medel
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Carlos M. Cruz
- Department of ChemistryFaculty of ScienceUniversity of ZurichWinterthurerstrasse 1908057ZurichSwitzerland
| | - Delia Miguel
- Departamento de FisicoquímicaFacultad de Farmacia, UEQUniversidad de Granada18071GranadaSpain
| | - Victor Blanco
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Sara P. Morcillo
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Araceli G. Campaña
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
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31
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Medel MA, Cruz CM, Miguel D, Blanco V, Morcillo SP, Campaña AG. Chiral Distorted Hexa‐
peri
‐hexabenzocoronenes Bearing a Nonagon‐Embedded Carbohelicene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Miguel A. Medel
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Carlos M. Cruz
- Department of Chemistry Faculty of Science University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Delia Miguel
- Departamento de Fisicoquímica Facultad de Farmacia, UEQ Universidad de Granada 18071 Granada Spain
| | - Victor Blanco
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Sara P. Morcillo
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Araceli G. Campaña
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
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32
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Yang C, Zhu X, Liu M. Helicenes at Air/Water Interface: Spreading Film and Metal Ion Induced a Helical Ring Nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10241-10247. [PMID: 34379419 DOI: 10.1021/acs.langmuir.1c01810] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two enantiomeric hydrohelicenes containing a hydroxyl group and a π-conjugated nonplanar structure are assembled at the air/water interface. These molecules are found to form spreading films with well-defined surface pressure-area isotherms. Upon transferring the spreading film onto the mica surface, porous nanostructures are observed. The spreading film can be transferred onto solid substrates by the Langmuir-Schaefer (LS) method and the transferred LS films display optical activity as revealed by the circular dichroism (CD) spectra. The P- and M-hydrohelicene enantiomers showed mirrored CD spectra, suggesting that the chirality of the LS films was controlled by molecular chirality. When these molecules are spread on the aqueous solution containing metal ions such as Ag+, Cu2+, and Zn2+, a clear twisted ring nanostructure, which is similar to the Möbius strip, is observed. It is suggested that the interaction between the hydroxyl groups of helicenes and metal ions induced such a ring nanostructure.
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Affiliation(s)
- Chenchen Yang
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xuefeng Zhu
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P. R. China
| | - Minghua Liu
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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33
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Chen J, Chen H, Xu F, Cao L, Jiang X, Yang S, Sun Y, Zhao X, Lin C, Ye N. Mg 2In 3Si 2P 7: A Quaternary Diamond-like Phosphide Infrared Nonlinear Optical Material Derived from ZnGeP 2. J Am Chem Soc 2021; 143:10309-10316. [PMID: 34196529 DOI: 10.1021/jacs.1c03930] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Balancing the second-harmonic generation (SHG) coefficient, band gap, and birefringence is a vital but addressable challenge for designing infrared nonlinear optical materials. By applying a "rigidity-flexibility coupling" strategy, a quaternary diamond-like phosphide, Mg2In3Si2P7, with wurtzite-type superstructure was successfully designed and synthesized. Remarkably, it achieved the rare coexistence of giant second-harmonic generation (2 × ZnGeP2 and 7.1 × AgGaS2), suitable band gap (2.21 eV), moderate birefringence (0.107), and wide IR transparent range (0.56-16.4 μm). First-principles calculations revealed that the giant SHG response and large birefringence can be attributed to the synergy of arrangement-aligned [InP4] and [SiP4] tetrahedra. This work not only opens a new avenue for designing advanced infrared nonlinear optical materials but also may spur more explorations on quaternary diamond-like pnictides.
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Affiliation(s)
- Jindong Chen
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongxiang Chen
- College of Materials, Fujian University of Technology, Fuzhou, Fujian 350108, China.,Fujian Key Laboratory of New Materials Preparation and Forming Technology, Fuzhou, Fujian 350118, China
| | - Feng Xu
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Liling Cao
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaotian Jiang
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shunda Yang
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Yingshuang Sun
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Zhao
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chensheng Lin
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Ning Ye
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350002, China
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34
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Hattori S, Moris M, Shinozaki K, Ishii K, Verbiest T. Vortex-Induced Harmonic Light Scattering of Porphyrin J-Aggregates. J Phys Chem B 2021; 125:2690-2695. [PMID: 33656877 DOI: 10.1021/acs.jpcb.0c09733] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An understanding of macroscopic vortex-induced chirality can provide insights into the origin of the homochirality of life. While circular dichroism measurements in stirred solutions are useful for the analysis of chiral supramolecular structures induced by vortex motion, there are no reports on the application of other spectroscopic methods. To obtain a deeper understanding of macroscopic vortex-induced chirality, it is essential to develop novel in situ spectroscopic methods that provide information about changes in both the size and chirality in stirred solutions. Here, we report the first observation by harmonic light scattering of the mirror-symmetry-breaking process of porphyrin J-aggregates under the rotation of a magnetic stirrer. The chiral supramolecular structure observed during stirring is likely due to the formation of a chiral aggregate that consists of porphyrin J-aggregates. The dissociation of the structure proceeds in two steps (a fast step and a slow step), as indicated by the signal decay rate when stirring was stopped. This novel method is useful for analyzing the supramolecular structural changes of chiral aggregates induced by external stimuli.
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Affiliation(s)
- Shingo Hattori
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.,Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, 3001 Heverlee, Belgium.,Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Michèle Moris
- Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, 3001 Heverlee, Belgium
| | - Kazuteru Shinozaki
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Kazuyuki Ishii
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Thierry Verbiest
- Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200D, Box 2425, 3001 Heverlee, Belgium
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35
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Gogoi A, Konwer S, Zhuo GY. Polarimetric Measurements of Surface Chirality Based on Linear and Nonlinear Light Scattering. Front Chem 2021; 8:611833. [PMID: 33644001 PMCID: PMC7902787 DOI: 10.3389/fchem.2020.611833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/31/2020] [Indexed: 01/21/2023] Open
Abstract
A molecule, molecular aggregate, or protein that cannot be superimposed on its mirror image presents chirality. Most living systems are organized by chiral building blocks, such as amino acids, peptides, and carbohydrates, and any change in their molecular structure (i.e., handedness or helicity) alters the biochemical and pharmacological functions of the molecules, many of which take place at surfaces. Therefore, studying surface chirogenesis at the nanoscale is fundamentally important and derives various applications. For example, since proteins contain highly ordered secondary structures, the intrinsic chirality can be served as a signature to measure the dynamics of protein adsorption and protein conformational changes at biological surfaces. Furthermore, a better understanding of chiral recognition and separation at bio-nanointerfaces is helpful to standardize chiral drugs and monitor the synthesis of adsorbents with high precision. Thus, exploring the changes in surface chirality with polarized excitations would provide structural and biochemical information of the adsorbed molecules, which has led to the development of label-free and noninvasive measurement tools based on linear and nonlinear optical effects. In this review, the principles and selected applications of linear and nonlinear optical methods for quantifying surface chirality are introduced and compared, aiming to conceptualize new ideas to address critical issues in surface biochemistry.
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Affiliation(s)
- Ankur Gogoi
- Department of Physics, Jagannath Barooah College, Jorhat, India
| | - Surajit Konwer
- Department of Chemistry, Dibrugarh University, Dibrugarh, India
| | - Guan-Yu Zhuo
- Institute of New Drug Development, China Medical University, Taichung, Taiwan.,Integrative Stem Cell Center, China Medical University Hospital, Taichung, Taiwan
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36
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Fujita T, Shoji N, Yoshikawa N, Ichikawa J. Helicene synthesis by Brønsted acid-catalyzed cycloaromatization in HFIP [(CF 3) 2CHOH]. Beilstein J Org Chem 2021; 17:396-403. [PMID: 33633807 PMCID: PMC7884880 DOI: 10.3762/bjoc.17.35] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 01/26/2021] [Indexed: 02/01/2023] Open
Abstract
A facile synthesis of carbo- and heterohelicenes was achieved via tandem cycloaromatization of bisacetal precursors, which were readily prepared through C–C bond formation by Suzuki–Miyaura coupling. This cyclization was efficiently realized by a catalytic amount of trifluoromethanesulfonic acid (TfOH) in a cation-stabilizing solvent, 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP), which readily allowed gram-scale syntheses of higher-order helicenes, double helical helicenes, and heterohelicenes.
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Affiliation(s)
- Takeshi Fujita
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Noriaki Shoji
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Nao Yoshikawa
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Junji Ichikawa
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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37
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Wang F, Nakano K, Segawa H, Tajima K. Inversion of Circular Dichroism Signals in Chiral Polythiophene Films Induced by End-On-Oriented Surface-Segregated Monolayers. ACS APPLIED MATERIALS & INTERFACES 2021; 13:7510-7516. [PMID: 33539070 DOI: 10.1021/acsami.0c22099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A chiral polythiophene surfactant based on poly(3-(S)-2-methylbutylthiophene) ((S)-P3MBT) with a semifluoroalkyl group at one end of the main chain was synthesized and used to form surface-segregated monolayers (SSMs). Films of pure (S)-P3MBT mainly adopted the edge-on orientation, whereas (S)-P3MBT films with a SSM of the polymer surfactant (S)-P3MBT-F17 contained a large proportion of end-on-oriented polythiophene, both at the surface and inside the films. The thin films with the SSM showed circular dichroism signals, with the sign opposite to those observed in (S)-P3MBT films. These findings suggest that the orientation-controlled SSM layers induced changes in the packing of the polymer aggregates in the films, resulting in a dramatic change in the excitonic interactions of the chiral semiconducting polymers.
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Affiliation(s)
- Fanji Wang
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kyohei Nakano
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
- Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Keisuke Tajima
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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Dusold C, Sharapa DI, Hampel F, Hirsch A. π-Extended Diaza[7]helicenes by Hybridization of Naphthalene Diimides and Hexa-peri-hexabenzocoronenes. Chemistry 2021; 27:2332-2341. [PMID: 32815577 PMCID: PMC7898888 DOI: 10.1002/chem.202003402] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/14/2020] [Indexed: 01/12/2023]
Abstract
The synthesis of an unprecedented, π-extended hexabenzocorene (HBC)-based diaza[7]helicene is presented. The target compound was synthesized by an ortho-fusion of two naphthalene diimide (NDI) units to a HBC-skeleton. A combination of Diels-Alder and Scholl-type oxidation reactions involving a symmetric di-NDI-tolane precursor were crucial for the very selective formation of the helical superstructure via a hexaphenyl-benzene (HPB) derivative. The formation of the diaza[7]helicene moiety in the final Scholl oxidation is favoured, affording the symmetric π-extended helicene as the major product as a pair of enantiomers. The separation of the enantiomers was successfully accomplished by HPLC involving a chiral stationary phase. The absolute configuration of the enantiomers was assigned by comparison of circular dichroism spectra with quantum mechanical calculations.
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Affiliation(s)
- Carolin Dusold
- Department of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Dmitry I. Sharapa
- Institute of Catalysis Research and TechnologyKarlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Frank Hampel
- Department of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Andreas Hirsch
- Department of Chemistry and PharmacyFriedrich-Alexander University Erlangen-NürnbergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
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Samkian AE, Kiel GR, Jones CG, Bergman HM, Oktawiec J, Nelson HM, Tilley TD. Elucidation of Diverse Solid-State Packing in a Family of Electron-Deficient Expanded Helicenes via Microcrystal Electron Diffraction (MicroED)*. Angew Chem Int Ed Engl 2021; 60:2493-2499. [PMID: 33090649 DOI: 10.1002/anie.202012213] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Indexed: 02/02/2023]
Abstract
Solid-state packing plays a defining role in the properties of a molecular organic material, but it is difficult to elucidate in the absence of single crystals that are suitable for X-ray diffraction. Herein, we demonstrate the coupling of divergent synthesis with microcrystal electron diffraction (MicroED) for rapid assessment of solid-state packing motifs, using a class of chiral nanocarbons-expanded helicenes-as a proof of concept. Two highly selective oxidative dearomatizations of a readily accessible helicene provided a divergent route to four electron-deficient analogues containing quinone or quinoxaline units. Crystallization efforts consistently yielded microcrystals that were unsuitable for single-crystal X-ray diffraction, but ideal for MicroED. This technique facilitated the elucidation of solid-state structures of all five compounds with <1.1 Å resolution. The otherwise-inaccessible data revealed a range of notable packing behaviors, including four different space groups, homochirality in a crystal for a helicene with an extremely low enantiomerization barrier, and nanometer scale cavities.
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Affiliation(s)
- Adrian E Samkian
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Gavin R Kiel
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Christopher G Jones
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Harrison M Bergman
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Julia Oktawiec
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Hosea M Nelson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - T Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
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40
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Tonkoglazova DI, Gulevskaya AV, Chistyakov KA, Askalepova OI. Synthesis, crystal structures and properties of carbazole-based [6]helicenes fused with an azine ring. Beilstein J Org Chem 2021; 17:11-21. [PMID: 33488827 PMCID: PMC7801798 DOI: 10.3762/bjoc.17.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/07/2020] [Indexed: 01/22/2023] Open
Abstract
Novel carbazole-based [6]helicenes fused with an azine ring (pyridine, pyrazine or quinoxaline) have been prepared through a five-step synthetic sequence in good overall yields. Commercially available 2,3-dihaloazines were used as starting materials. To discern the effect of merging an azine moiety within a helical skeleton, the X-ray structures, UV–vis absorption and fluorescence spectra of the helicenes were investigated and compared to that of the parent carbazole-based [6]helicene (7H-phenanthro[3,4-c]carbazole).
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Affiliation(s)
- Daria I Tonkoglazova
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
| | - Anna V Gulevskaya
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
| | - Konstantin A Chistyakov
- I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, Yekaterinburg 620219, Russian Federation
| | - Olga I Askalepova
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
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41
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Xiao X, Pedersen SK, Aranda D, Yang J, Wiscons RA, Pittelkow M, Steigerwald ML, Santoro F, Schuster NJ, Nuckolls C. Chirality Amplified: Long, Discrete Helicene Nanoribbons. J Am Chem Soc 2020; 143:983-991. [DOI: 10.1021/jacs.0c11260] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Xiao
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Stephan K. Pedersen
- Department of Chemistry, Columbia University, New York 10027, United States
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Daniel Aranda
- Departamente de Quimica Fisica, Universidad de Malaga, Bulevar Louis Pasteur 31, Malaga 29010, Spain
- CNR-Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Jingjing Yang
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Ren A. Wiscons
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Michael Pittelkow
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | | | - Fabrizio Santoro
- CNR-Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | | | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York 10027, United States
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42
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Wang Q, Zhang WW, Zheng C, Gu Q, You SL. Enantioselective Synthesis of Azoniahelicenes by Rh-Catalyzed C–H Annulation with Alkynes. J Am Chem Soc 2020; 143:114-120. [DOI: 10.1021/jacs.0c11735] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Qiang Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wen-Wen Zhang
- Chang-Kung Chuang Institute, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Qing Gu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
- Chang-Kung Chuang Institute, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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43
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Jo H, Chen X, Lee H, Ok KM. Chiral Template‐Driven Macroscopic Chirality Control: Structure‐Second‐Harmonic Generation Properties Relationship. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000964] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hongil Jo
- Department of Chemistry Sogang University Seoul 04107 Republic of Korea
| | - Xinglong Chen
- Department of Chemistry Sogang University Seoul 04107 Republic of Korea
| | - Hee‐Seung Lee
- Department of Chemistry Korean Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Kang Min Ok
- Department of Chemistry Sogang University Seoul 04107 Republic of Korea
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44
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Samkian AE, Kiel GR, Jones CG, Bergman HM, Oktawiec J, Nelson HM, Tilley TD. Elucidation of Diverse Solid‐State Packing in a Family of Electron‐Deficient Expanded Helicenes via Microcrystal Electron Diffraction (MicroED)**. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Adrian E. Samkian
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Gavin R. Kiel
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Christopher G. Jones
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Harrison M. Bergman
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Julia Oktawiec
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Hosea M. Nelson
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - T. Don Tilley
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
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45
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Henderson WR, Castellano RK. Supramolecular polymerization of chiral molecules devoid of chiral centers. POLYM INT 2020. [DOI: 10.1002/pi.6111] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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46
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Liu C, Liu K, Mukhopadhyay A, Paulino V, Bernard B, Olivier JH. Butadiyne-Bridged (Porphinato)Zinc(II) Chromophores Assemble into Free-Standing Nanosheets. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Chuan Liu
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Kaixuan Liu
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Arindam Mukhopadhyay
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Victor Paulino
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Brianna Bernard
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
| | - Jean-Hubert Olivier
- Department of Chemistry, The University of Miami, 1301 Memorial Drive, Cox Science Building, Coral Gables, Florida 33146, United States
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47
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Chirality at the Nanoparticle Surface: Functionalization and Applications. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10155357] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Chiral molecules, such as amino acids and carbohydrates, are the building blocks of nature. As a consequence, most natural supramolecular structures, such as enzymes and receptors, are able to distinguish among different orientations in space of functional groups, and enantiomers of chiral drugs usually have different pharmacokinetic properties and physiological effects. In this regard, the ability to recognize a single enantiomer from a racemic mixture is of paramount importance. Alternatively, the capacity to synthetize preferentially one enantiomer over another through a catalytic process can eliminate (or at least simplify) the subsequent isolation of only one enantiomer. The advent of nanotechnology has led to noteworthy improvements in many fields, from material science to nanomedicine. Similarly, nanoparticles functionalized with chiral molecules have been exploited in several fields. In this review, we report the recent advances of the use of chiral nanoparticles grouped in four major areas, i.e., enantioselective recognition, asymmetric catalysis, biosensing, and biomedicine.
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48
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Swathi K, Sissa C, Painelli A, George Thomas K. Supramolecular chirality: a caveat in assigning the handedness of chiral aggregates. Chem Commun (Camb) 2020; 56:8281-8284. [PMID: 32572405 DOI: 10.1039/d0cc01922d] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The handedness of a supramolecular chiral aggregate is often assigned based on the sign of circular dichroism spectra, adopting the exciton chirality method. However, the method does not properly account for the nature of intermolecular interactions. We introduce a generalized picture on the use of the sign of chiral signals in determining the helicity of chiral aggregates, rooted in the exciton model, supported by TD-DFT results.
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Affiliation(s)
- K Swathi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy.
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49
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Gauthier ES, Rodríguez R, Crassous J. Metal‐Based Multihelicenic Architectures. Angew Chem Int Ed Engl 2020; 59:22840-22856. [DOI: 10.1002/anie.202004361] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 11/10/2022]
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50
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Gauthier ES, Rodríguez R, Crassous J. Metal‐Based Multihelicenic Architectures. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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