101
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Luo YH, Chen C, Wang JW, He XT, Hong DL, An PJ, Wu HS, Sun BW. Confinement of Reagents in Crystalline Matrix with the Help of Magnetic Field. ChemistrySelect 2018. [DOI: 10.1002/slct.201702533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yang-Hui Luo
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Chen Chen
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Jing-Wen Wang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Xiao-Tong He
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Dan-Li Hong
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Pei-Jing An
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Hong-Shuai Wu
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
| | - Bai-Wang Sun
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R. China
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102
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Sang Y, Duan P, Liu M. Nanotrumpets and circularly polarized luminescent nanotwists hierarchically self-assembled from an achiralC3-symmetric ester. Chem Commun (Camb) 2018; 54:4025-4028. [DOI: 10.1039/c8cc02130a] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An achiralC3-symmetric molecule was found to self-assemble into various hierarchical nanostructures such as nanotwists, nanotrumpets and nanobelts, in which the twisted fibers showed supramolecular chirality as well as circularly polarized luminescence although the compound is achiral.
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Affiliation(s)
- Yutao Sang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
- University of Chinese Academy of Sciences
- Beijing
| | - Pengfei Duan
- National Center for Nanoscience and Technology, China
- P. R. China
| | - Minghua Liu
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
- University of Chinese Academy of Sciences
- Beijing
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103
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Kimura F, Kimura T. Magnetically textured powders—an alternative to single-crystal and powder X-ray diffraction methods. CrystEngComm 2018. [DOI: 10.1039/c7ce01305a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Structure determination of materials in their crystalline phase aids in the understanding and design of their functions.
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Affiliation(s)
- Fumiko Kimura
- Division of Forestry and Biomaterials
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Tsunehisa Kimura
- Division of Forestry and Biomaterials
- Kyoto University
- Kyoto 606-8502
- Japan
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104
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Lazzeretti P. Chiral discrimination in nuclear magnetic resonance spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:443001. [PMID: 28786393 DOI: 10.1088/1361-648x/aa84d5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chirality is a fundamental property of molecules whose spatial symmetry is characterized by the absence of improper rotations, making them not superimposable to their mirror image. Chiral molecules constitute the elementary building blocks of living species and one enantiomer is favoured in general (e.g. L-aminoacids and D-sugars pervade terrestrial homochiral biochemistry) because most chemical reactions producing natural substances are enantioselective. Since the effect of chiral chemicals and drugs on living beings can be markedly different between enantiomers, the quest for practical spectroscopical methods to scrutinize chirality is an issue of great importance and interest. Nuclear magnetic resonance (NMR) is a topmost analytical technique, but spectrometers currently used are 'blind' to chirality, i.e. unable to discriminate the two mirror-image forms of a chiral molecule, because, in the absence of a chiral solvent, the spectral parameters, chemical shifts and spin-spin coupling constants are identical for enantiomers. Therefore, the development of new procedures for routine chiral recognition would offer basic support to scientists. However, in the presence of magnetic fields, a distinction between true and false chirality is mandatory. The former epitomizes natural optical activity, which is rationalized by a time-even pseudoscalar, i.e. the trace of a second-rank tensor, the mixed electric dipole/magnetic dipole polarizability. The Faraday effect, magnetic circular dichroism and magnetic optical activity are instead related to a time-odd axial vector. The present review summarizes recent theoretical and experimental efforts to discriminate enantiomers via NMR spectroscopy, with the focus on the deep connection between chirality and symmetry properties under the combined set of fundamental discrete operations, namely charge conjugation, parity (space inversion) and time (motion) reversal.
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Affiliation(s)
- Paolo Lazzeretti
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Roma, Italia
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105
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Sorrenti A, Leira-Iglesias J, Markvoort AJ, de Greef TFA, Hermans TM. Non-equilibrium supramolecular polymerization. Chem Soc Rev 2017; 46:5476-5490. [PMID: 28349143 PMCID: PMC5708531 DOI: 10.1039/c7cs00121e] [Citation(s) in RCA: 351] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Indexed: 12/21/2022]
Abstract
Supramolecular polymerization has been traditionally focused on the thermodynamic equilibrium state, where one-dimensional assemblies reside at the global minimum of the Gibbs free energy. The pathway and rate to reach the equilibrium state are irrelevant, and the resulting assemblies remain unchanged over time. In the past decade, the focus has shifted to kinetically trapped (non-dissipative non-equilibrium) structures that heavily depend on the method of preparation (i.e., pathway complexity), and where the assembly rates are of key importance. Kinetic models have greatly improved our understanding of competing pathways, and shown how to steer supramolecular polymerization in the desired direction (i.e., pathway selection). The most recent innovation in the field relies on energy or mass input that is dissipated to keep the system away from the thermodynamic equilibrium (or from other non-dissipative states). This tutorial review aims to provide the reader with a set of tools to identify different types of self-assembled states that have been explored so far. In particular, we aim to clarify the often unclear use of the term "non-equilibrium self-assembly" by subdividing systems into dissipative, and non-dissipative non-equilibrium states. Examples are given for each of the states, with a focus on non-dissipative non-equilibrium states found in one-dimensional supramolecular polymerization.
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Affiliation(s)
- Alessandro Sorrenti
- University of Strasbourg , CNRS , ISIS UMR 7006 , F-67000 Strasbourg , France .
| | | | - Albert J. Markvoort
- Computational Biology Group and Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands .
| | - Tom F. A. de Greef
- Computational Biology Group and Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands .
| | - Thomas M. Hermans
- University of Strasbourg , CNRS , ISIS UMR 7006 , F-67000 Strasbourg , France .
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106
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Ryzhikov MR, Kozlova SG. Induced currents and an 1H NMR chemical shifts in transition metal clusters (μ-H)2Fe3(μ3-Q)(CO)9 (Q = S, Se, Te). J STRUCT CHEM+ 2017. [DOI: 10.1134/s002247661705002x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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107
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Zhang X, Wang Y, Chen P, Rong Y, Liu M. Interfacial organization of achiral porphyrins via unidirectional compression: a general method for chiroptical porphyrin assemblies of selected chirality. Phys Chem Chem Phys 2017; 18:14023-9. [PMID: 27156996 DOI: 10.1039/c6cp00683c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Porphyrins are considered to be important scaffolds bridging supramolecular chemistry and chiral chemistry, where chirality selection via physical effects such as directional stirring and spin-coating has aroused particular interest. Nevertheless, these protocols could only work on a limited number of achiral porphyrins. It still remains a formidable challenge to pave a general avenue for the construction of chiral assemblies using achiral porphyrins. By means of a unique Langmuir-Schaefer (LS) technique of a unidirectional compression configuration, we herein have demonstrated that a series of achiral porphyrins could be facilely organized to form chiral interfacial assemblies of controlled supramolecular chirality. It has been disclosed that such a fascinating chirality selection scenario is intimately related to the direction of the compression-generated vortex-like flow, while the compression speed, one of the most significant parameters of the Langmuir technique, contributes less to this issue. With regard to a surface-pressure-dependent chirality selection phenomenon, it is suggested that the directional vortex-like flow generated by lateral compression might play a role in promoting the preferential growth of chiral assemblies showing an enhanced yet controlled CD signal. Our protocol might be, to some extent, a general method for achieving chiral porphyrin assemblies of controlled chirality.
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Affiliation(s)
- Xiao Zhang
- 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, People's Republic of China.
| | - Yanping Wang
- 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, People's Republic of China.
| | - Penglei Chen
- 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, People's Republic of China.
| | - Yunlong Rong
- 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, People's Republic of 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, People's Republic of China.
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108
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Zagami R, Castriciano MA, Romeo A, Scolaro LM. Spectroscopic investigations on chiral J-aggregates induced by tartaric acid in alcoholic solution. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424617500183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chiral J-aggregates of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS[Formula: see text] have been obtained in ethanol solution triggered by addition of both enantiomeric forms of tartaric acid. A detailed spectroscopic investigation has been performed on aggregates obtained by a well-defined mixture protocol of reactants. Our findings show as both aggregation process and induced supramolecular chirality essentially depend on the concentration of the reactants. Contrary to what occurs in aqueous solution, TPPS4 in ethanol solution shows: (i) at low porphyrin concentration, an aggregation behavior characterized by a L-tartaric acid threshold whereas the D-tartaric does not work even at high concentrations, so revealing an enantiomeric discrimination; (ii) at high porphyrin concentration, a large kinetic discrimination of D- vs. L-enantiomer.
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Affiliation(s)
- Roberto Zagami
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Maria Angela Castriciano
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Andrea Romeo
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali and C.I.R.C.M.S.B., V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Luigi Monsù Scolaro
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali and C.I.R.C.M.S.B., V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
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109
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Kozlova SG, Kompankov NB, Zavakhina MS. Activation Parameters of Self-Diffusion of Aromatic Chiral Molecules in External Magnetic Fields. J Phys Chem B 2017. [PMID: 28628324 DOI: 10.1021/acs.jpcb.7b05847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mobility of aromatic chiral molecules 1-phenylethanol and 1-phenyl-1-propanol in liquids was studied by 1H NMR spectroscopy depending on the strength of the external magnetic field, temperature, and concentration ratio of enantiomers. The data obtained were analyzed using Arrhenius law. The activation parameters were found to depend on the applied field. This effect is caused by the induced magnetic moments in aromatic molecules. The use of strong magnetic fields seems to be promising for investigation of intermolecular interactions of chiral molecules.
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Affiliation(s)
- Svetlana G Kozlova
- Nikolaev Institute of Inorganic Chemistry , Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation.,Novosibirsk State University , 2, Pirogova Street, 630090 Novosibirsk, Russian Federation
| | - Nikolay B Kompankov
- Nikolaev Institute of Inorganic Chemistry , Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - Marina S Zavakhina
- Nikolaev Institute of Inorganic Chemistry , Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation.,Novosibirsk State University , 2, Pirogova Street, 630090 Novosibirsk, Russian Federation
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110
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Zhang L, Zhou L, Xu N, Ouyang Z. A Carbon Dioxide Bubble-Induced Vortex Triggers Co-Assembly of Nanotubes with Controlled Chirality. Angew Chem Int Ed Engl 2017; 56:8191-8195. [PMID: 28508524 DOI: 10.1002/anie.201701749] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/25/2017] [Indexed: 11/06/2022]
Abstract
It is challenging to prepare co-organized nanotube systems with controlled nanoscale chirality in an aqueous liquid flow field. Such systems are responsive to a bubbled external gas. A liquid vortex induced by bubbling carbon dioxide (CO2 ) gas was used to stimulate the formation of nanotubes with controlled chirality; two kinds of achiral cationic building blocks were co-assembled in aqueous solution. CO2 -triggered nanotube formation occurs by formation of metastable intermediate structures (short helical ribbons and short tubules) and by transition from short tubules to long tubules in response to chirality matching self-assembly. Interestingly, the chirality sign of these assemblies can be selected for by the circulation direction of the CO2 bubble-induced vortex during the co-assembly process.
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Affiliation(s)
- Ling Zhang
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Laicheng Zhou
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Na Xu
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Zhenjie Ouyang
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
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111
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Zhang L, Zhou L, Xu N, Ouyang Z. A Carbon Dioxide Bubble-Induced Vortex Triggers Co-Assembly of Nanotubes with Controlled Chirality. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ling Zhang
- PCFM Lab and GDHPRC Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Laicheng Zhou
- PCFM Lab and GDHPRC Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Na Xu
- PCFM Lab and GDHPRC Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Zhenjie Ouyang
- PCFM Lab and GDHPRC Lab, School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
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112
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Wu J, Yang J. Superlong Salicylideneaniline Semiconductor Nanobelts Prepared by a Magnetic Nanoparticle-Assisted Self-Assembly Process for Luminescence Thermochromism. ACS OMEGA 2017; 2:2264-2272. [PMID: 31457577 PMCID: PMC6641110 DOI: 10.1021/acsomega.7b00219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 03/30/2017] [Indexed: 05/26/2023]
Abstract
Controlling the molecular assembling and nanomorphology of organic semiconductors is crucial to obtain high-performance electronic devices. In this work, we have first reported novel superlong salicylideneaniline nanobelts (mHBA) using the magnetic nanoparticle-assisted self-assembly process. Our results show that magnetic nanoparticles will obviously influence the self-assembly behavior, nanomorphology, and crystal structure of molecular HBA. Moreover, the intensity of fluorescence mHBA exhibits decreasing and increasing patterns, with the increase in temperature over a wide temperature range of 8 to 295 K. To elucidate the origin of tautomer forms, the ground and excited states of mHBA were experimentally and theoretically studied. Our results suggest that superlong HBA nanobelts provide a promising intelligent fluorescent thermometer and an organic field-effect transistor.
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Affiliation(s)
- Jian Wu
- State
Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, South Taoyuan Road, Taiyuan, Shanxi 030001, China
| | - Jinglei Yang
- Department
of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
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113
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Morrow SM, Bissette AJ, Fletcher SP. Transmission of chirality through space and across length scales. NATURE NANOTECHNOLOGY 2017; 12:410-419. [PMID: 28474691 DOI: 10.1038/nnano.2017.62] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/09/2017] [Indexed: 05/26/2023]
Abstract
Chirality is a fundamental property and vital to chemistry, biology, physics and materials science. The ability to use asymmetry to operate molecular-level machines or macroscopically functional devices, or to give novel properties to materials, may address key challenges at the heart of the physical sciences. However, how chirality at one length scale can be translated to asymmetry at a different scale is largely not well understood. In this Review, we discuss systems where chiral information is translated across length scales and through space. A variety of synthetic systems involve the transmission of chiral information between the molecular-, meso- and macroscales. We show how fundamental stereochemical principles may be used to design and understand nanoscale chiral phenomena and highlight important recent advances relevant to nanotechnology. The survey reveals that while the study of stereochemistry on the nanoscale is a rich and dynamic area, our understanding of how to control and harness it and dial-up specific properties is still in its infancy. The long-term goal of controlling nanoscale chirality promises to be an exciting journey, revealing insight into biological mechanisms and providing new technologies based on dynamic physical properties.
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Affiliation(s)
- Sarah M Morrow
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| | - Andrew J Bissette
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| | - Stephen P Fletcher
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
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114
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Buendía J, Calbo J, Ortí E, Sánchez L. Flexible Chirality in Self-Assembled N-Annulated Perylenedicarboxamides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603880. [PMID: 28388003 DOI: 10.1002/smll.201603880] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/01/2017] [Indexed: 06/07/2023]
Abstract
N-annulated perylenedicarboxamides 1-3 form supramolecular polymers with a strong tendency to aggregate. The bundles of fibers formed generate a spontaneous anisotropy that conditions the chiroptical features of the described molecules in solution; a strong linear dichroism effect accompanies the circular dichroism (CD) outcome. There is no influence of the point chirality existing at the side chains of 1 and 2, and these molecules present the same chiroptical features as achiral 3. Mechanical rotary stirring increases the CD response and the sign of the dichroic signal changes with the stirring direction. Theoretical calculations indicate that the self-assembly of 1-3 in helical columnar stacks generates atropisomers by the restricted rotation of the H-bonded benzamide units. Molecular mechanics/molecular dynamics calculations predict a feasible intrastack stereomutation of the helical aggregates due to the rapid rupture/formation of the amide H-bonds. This oscillating helicity, together with the fact that right- and left-handed helices are predicted to be mostly isoenergetic, justifies the negligible contribution of the molecular chirality embedded in the paraffinic side chains of 1 and 2. The reported CD behavior contributes to shed light on the physical processes promoting flexible macroscopic chirality that, in turn, can be utilized for the spectroscopic visualization of torsional flows generated in a vortex.
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Affiliation(s)
- Julia Buendía
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Joaquín Calbo
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Luis Sánchez
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
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115
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Mai TT, Viswambharan B, Gori D, Guillot R, Naubron JV, Kouklovsky C, Alezra V. Frozen Chirality of Tertiary Aromatic Amides: Access to Enantioenriched Tertiary α-Amino Acid or Amino Alcohol without Chiral Reagent. Chemistry 2017; 23:5787-5798. [PMID: 28225179 DOI: 10.1002/chem.201700110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Indexed: 11/05/2022]
Abstract
One of the fundamental and intriguing aspects of life is the homochirality of the essential molecules. In this field, the absolute asymmetric synthesis of α-amino acids is a major challenge. Herein, we report access, by chemical means, to tertiary α-amino acid derivatives in up to 96 % ee without using any chiral reagent. In our strategy, the dynamic axial chirality of tertiary aromatic amides is frozen in a crystal and is responsible for the stereoselectivity of the subsequent steps. Furthermore, we could control the configuration of the final product by manually sorting and selecting the initial crystals. Based on vibrational circular dichroism studies, we could rationalize the observed stereoselectivity.
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Affiliation(s)
- Thi Thoa Mai
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Baby Viswambharan
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Didier Gori
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Régis Guillot
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Jean-Valère Naubron
- Aix Marseille Université, Centrale Marseille, CNRS-Spectropole, FR1739, 13397, Marseille, France
| | - Cyrille Kouklovsky
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Valérie Alezra
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
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116
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Hattori S, Yamamoto Y, Miyatake T, Ishii K. Magneto-chiral dichroism measurements using a pulsed electromagnet. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.02.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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117
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Castriciano MA, Gentili D, Romeo A, Cavallini M, Scolaro LM. Spatial control of chirality in supramolecular aggregates. Sci Rep 2017; 7:44094. [PMID: 28275239 PMCID: PMC5343480 DOI: 10.1038/srep44094] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/26/2017] [Indexed: 01/14/2023] Open
Abstract
Chirality is one of the most intriguing properties of matter related to a molecule’s lack of mirror symmetry. The transmission of chirality from the molecular level up to the macroscopic scale has major implications in life sciences but it is also relevant for many chemical applications ranging from catalysis to spintronic. These technological applications require an accurate control of morphology, homogeneity and chiral handedness of thin films and nanostructures. We demonstrate a simple approach to specifically transfer chirality to the model supramolecular system of J aggregates of the protonated form of tetrakis(4-sulfonatophenyl)-porphyrin by utilizing a soft lithography technique. This approach successfully allows the fabrication of an ordered distribution of sub-micrometric structures in precise and controllable positions with programmed chirality, providing a fundamental breakthrough toward the exploitation of chiral supramolecular aggregates in technological applications, such as sensors, non-linear optics and spintronic.
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Affiliation(s)
- Maria A Castriciano
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Italy
| | - Denis Gentili
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Italy
| | - Andrea Romeo
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Italy.,Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, and C.I.R.C.M.S.B., V.le F. Stagno D'Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
| | - Massimiliano Cavallini
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Italy
| | - Luigi Monsù Scolaro
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati, Italy.,Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, and C.I.R.C.M.S.B., V.le F. Stagno D'Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
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118
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Romeo A, Castriciano MA, Zagami R, Pollicino G, Monsù Scolaro L, Pasternack RF. Effect of zinc cations on the kinetics of supramolecular assembly and the chirality of porphyrin J-aggregates. Chem Sci 2017; 8:961-967. [PMID: 28451233 PMCID: PMC5354048 DOI: 10.1039/c6sc02686a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 09/28/2016] [Indexed: 12/19/2022] Open
Abstract
Dilute aqueous solutions of anionic meso-4-sulfonatophenyl-porphyrin (TPPS) extract zinc(ii) ions from glass or quartz surfaces at room temperature and efficiently form the corresponding metal complex (ZnTPPS). The partial or complete formation of ZnTPPS has been probed by UV/Vis spectroscopy and both static and time-resolved fluorescence. The source of zinc(ii) ions has been clearly identified through inductively coupled plasma optical emission spectrometry. The presence of increasing amounts of ZnTPPS slows down the rate of TPPS J-aggregate formation in acid solution. This influences the nucleation step and has a profound impact on the onset of chirality in these species. This evidence indicates the important role of this adventitious metal ion in the interpretation of various spectroscopic and kinetic data for the self-assembly of the TPPS porphyrin and provides some insights into controversial findings on their chirality. The use of this metal derivative as the starting compound for in situ formation of monomeric TPPS is suggested.
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Affiliation(s)
- A Romeo
- Istituto per lo Studio dei Materiali Nanostrutturati ISMN-CNR c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy .
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , C.I.R.C.M.S.B , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy
| | - M A Castriciano
- Istituto per lo Studio dei Materiali Nanostrutturati ISMN-CNR c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy .
| | - R Zagami
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , C.I.R.C.M.S.B , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy
| | - G Pollicino
- Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali , Sezione SASTAS , University of Messina , Messina , Italy
| | - L Monsù Scolaro
- Istituto per lo Studio dei Materiali Nanostrutturati ISMN-CNR c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy .
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , C.I.R.C.M.S.B , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy
| | - R F Pasternack
- Department of Chemistry and Biochemistry , Swarthmore College , Swarthmore , Pennsylvania PA 19081 , USA
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119
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Ribo JM, El-Hachemi Z, Arteaga O, Canillas A, Crusats J. Hydrodynamic Effects in Soft-matter Self-assembly: The Case of J-Aggregates of Amphiphilic Porphyrins. CHEM REC 2017; 17:713-724. [DOI: 10.1002/tcr.201600133] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Josep M. Ribo
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Zoubir El-Hachemi
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Oriol Arteaga
- Department of Applied Physics; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- FEMAN Group; Institute of Nanoscience and Nanotechnology (IN2UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Adolf Canillas
- Department of Applied Physics; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- FEMAN Group; Institute of Nanoscience and Nanotechnology (IN2UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Joaquim Crusats
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
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120
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Zagami R, Romeo A, Castriciano MA, Monsù Scolaro L. Inverse Kinetic and Equilibrium Isotope Effects on Self-Assembly and Supramolecular Chirality of Porphyrin J-Aggregates. Chemistry 2016; 23:70-74. [DOI: 10.1002/chem.201604675] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Roberto Zagami
- CNR-ISMN; Istituto per lo Studio dei Materiali Nanostrutturati; c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina; V.le F. Stagno D'Alcontres 31 98166 Messina Italy), Fax
| | - Andrea Romeo
- CNR-ISMN; Istituto per lo Studio dei Materiali Nanostrutturati; c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina; V.le F. Stagno D'Alcontres 31 98166 Messina Italy), Fax
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina, and C.I.R.C.M.S.B.; V.le F. Stagno D'Alcontres 31 98166 Messina Italy
| | - Maria A. Castriciano
- CNR-ISMN; Istituto per lo Studio dei Materiali Nanostrutturati; c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina; V.le F. Stagno D'Alcontres 31 98166 Messina Italy), Fax
| | - Luigi Monsù Scolaro
- CNR-ISMN; Istituto per lo Studio dei Materiali Nanostrutturati; c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina; V.le F. Stagno D'Alcontres 31 98166 Messina Italy), Fax
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali; University of Messina, and C.I.R.C.M.S.B.; V.le F. Stagno D'Alcontres 31 98166 Messina Italy
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121
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Yashima E, Ousaka N, Taura D, Shimomura K, Ikai T, Maeda K. Supramolecular Helical Systems: Helical Assemblies of Small Molecules, Foldamers, and Polymers with Chiral Amplification and Their Functions. Chem Rev 2016; 116:13752-13990. [PMID: 27754649 DOI: 10.1021/acs.chemrev.6b00354] [Citation(s) in RCA: 1198] [Impact Index Per Article: 149.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this review, we describe the recent advances in supramolecular helical assemblies formed from chiral and achiral small molecules, oligomers (foldamers), and helical and nonhelical polymers from the viewpoints of their formations with unique chiral phenomena, such as amplification of chirality during the dynamic helically assembled processes, properties, and specific functionalities, some of which have not been observed in or achieved by biological systems. In addition, a brief historical overview of the helical assemblies of small molecules and remarkable progress in the synthesis of single-stranded and multistranded helical foldamers and polymers, their properties, structures, and functions, mainly since 2009, will also be described.
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Affiliation(s)
- Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Kouhei Shimomura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
| | - Katsuhiro Maeda
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
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122
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Maity A, Gangopadhyay M, Basu A, Aute S, Babu SS, Das A. Counteranion Driven Homochiral Assembly of a Cationic C3-Symmetric Gelator through Ion-Pair Assisted Hydrogen Bond. J Am Chem Soc 2016; 138:11113-6. [PMID: 27517868 DOI: 10.1021/jacs.6b06312] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The helical handedness in achiral self-assemblies is mostly complex due to spontaneous symmetry breaking or kinetically controlled random assembly formation. Here an attempt has been made to address this issue through chiral anion exchange. A new class of cationic achiral C3-symmetric gelator devoid of any conventional gelation assisting functional units is found to form both right- and left-handed helical structures. A chiral counteranion exchange-assisted approach is successfully introduced to control the chirality sign and thereby to obtain preferred homochiral assemblies. Formation of anion-assisted chiral assembly was confirmed by circular dichroism (CD) spectroscopy, microscopic images, and crystal structure. The X-ray crystal structure reveals the construction of helical assemblies with opposite handedness for (+)- and (-)-chiral anion reformed gelators. The appropriate counteranion driven ion-pair-assisted hydrogen-bonding interactions are found responsible for the helical bias control in this C3-symmetric gelator.
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Affiliation(s)
| | | | | | | | | | - Amitava Das
- CSIR-Central Salt & Marine Chemicals Research Institute , Bhavnagar 364002, Gujarat, India
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123
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Kozlova SG, Ryzhikov MR, Kompankov NB, Zavakhina MS. Influence of Magnetic Field on the Mobility of Aromatic Chiral Molecules. J Phys Chem B 2016; 120:7517-21. [DOI: 10.1021/acs.jpcb.6b05572] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. G. Kozlova
- Nikolaev
Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, 2,
Pirogova Street, Novosibirsk 630090, Russian Federation
| | - M. R. Ryzhikov
- Nikolaev
Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, 2,
Pirogova Street, Novosibirsk 630090, Russian Federation
| | - N. B. Kompankov
- Nikolaev
Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
| | - M. S. Zavakhina
- Nikolaev
Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3, Akad. Lavrentiev Avenue, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, 2,
Pirogova Street, Novosibirsk 630090, Russian Federation
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124
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Zhang ZM, Duan X, Yao S, Wang Z, Lin Z, Li YG, Long LS, Wang EB, Lin W. Cation-mediated optical resolution and anticancer activity of chiral polyoxometalates built from entirely achiral building blocks. Chem Sci 2016; 7:4220-4229. [PMID: 30155068 PMCID: PMC6013930 DOI: 10.1039/c5sc04408a] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 03/09/2016] [Indexed: 11/21/2022] Open
Abstract
We report the crystallization of homochiral polyoxometalate (POM) macroanions {CoSb6O4(H2O)3[Co(hmta)SbW8O31]3}15- (1, hmta = hexamethylenetetramine) via the counter cation-mediated chiral symmetry breaking and asymmetric autocatalytic processes. In the presence of low Co2+ concentrations both Δ- and Λ-enantiomers of 1 formed in the reaction, crystallizing into the racemic crystal rac-1. At a high Co2+ concentration, the polyoxoanion enantiomers showed a high level of chiral recognition via H-bonding interactions to crystallize into enantiopure crystals of Δ- or Λ-[Co(H2O)6{CoSb6O4(H2O)3[Co(hmta)SbW8O31]3}]13-. During crystallization, a microscale symmetry-breaking event and a nonlinear asymmetric autocatalysis process make the enantiomers crystallize in different batches, which provides an opportunity to isolate the homochiral bulk materials. The defined structures of the racemic and homochiral crystals thus provide a molecular-level illustration that H-bonding interactions are responsible for such high-level chiral recognition, in a process similar to the supramolecular chirality frequently observed in biology. These POM macroanions showed a high cytotoxicity against various cancer cells, particularly ovarian cancer cells. The antitumor activity of these compounds resulted at least in part from the activation of the apoptotic pathways, as shown by the flow cytometry, Annexin V staining, DNA ladder, and TUNEL assay, likely by blocking the cell cycle and complexing with proteins in cells. The POM macroanions reported herein provide promising and novel antitumor agents for the potential treatment of various cancers.
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Affiliation(s)
- Zhi-Ming Zhang
- Key Laboratory of Polyoxometalate Science of Ministry of Education , Faculty of Chemistry , Northeast Normal University , Ren Min Street No. 5268 , Changchun , Jilin 130024 , P. R. China .
- Department of Chemistry , University of Chicago , 929 E. 57th Street , Chicago , Illinois 60637 , USA .
- Collaborative Innovation Center of Chemistry for Energy Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - Xiaopin Duan
- Department of Chemistry , University of Chicago , 929 E. 57th Street , Chicago , Illinois 60637 , USA .
| | - Shuang Yao
- Department of Chemistry , University of Chicago , 929 E. 57th Street , Chicago , Illinois 60637 , USA .
| | - Zhishu Wang
- Key Laboratory of Polyoxometalate Science of Ministry of Education , Faculty of Chemistry , Northeast Normal University , Ren Min Street No. 5268 , Changchun , Jilin 130024 , P. R. China .
| | - Zekai Lin
- Department of Chemistry , University of Chicago , 929 E. 57th Street , Chicago , Illinois 60637 , USA .
| | - Yang-Guang Li
- Key Laboratory of Polyoxometalate Science of Ministry of Education , Faculty of Chemistry , Northeast Normal University , Ren Min Street No. 5268 , Changchun , Jilin 130024 , P. R. China .
| | - La-Sheng Long
- Collaborative Innovation Center of Chemistry for Energy Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - En-Bo Wang
- Key Laboratory of Polyoxometalate Science of Ministry of Education , Faculty of Chemistry , Northeast Normal University , Ren Min Street No. 5268 , Changchun , Jilin 130024 , P. R. China .
| | - Wenbin Lin
- Department of Chemistry , University of Chicago , 929 E. 57th Street , Chicago , Illinois 60637 , USA .
- Collaborative Innovation Center of Chemistry for Energy Materials , Xiamen University , Xiamen 361005 , P. R. China
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125
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El-Hachemi Z, Balaban TS, Campos JL, Cespedes S, Crusats J, Escudero C, Kamma-Lorger CS, Llorens J, Malfois M, Mitchell GR, Tojeira AP, Ribó JM. Effect of Hydrodynamic Forces on meso-(4-Sulfonatophenyl)-Substituted Porphyrin J-Aggregate Nanoparticles: Elasticity, Plasticity and Breaking. Chemistry 2016; 22:9740-9. [PMID: 27238461 DOI: 10.1002/chem.201600874] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Indexed: 11/10/2022]
Abstract
The J aggregates of 4-sulfonatophenyl meso-substituted porphyrins are non-covalent polymers obtained by self-assembly that form nanoparticles of different morphologies. In the case of high aspect-ratio nanoparticles (bilayered ribbons and monolayered nanotubes), shear hydrodynamic forces may modify their shape and size, as observed by peak force microscopy, transmission electron microscopy of frozen solutions, small-angle X-ray scattering measurements in a disk-plate rotational cell, and cone-plate rotational viscometry. These nanoparticles either show elastic or plastic behaviour: there is plasticity in the ribbons obtained upon nanotube collapse on solid/air interfaces and in viscous concentrated nanotube solutions, whereas elasticity occurs in the case of dilute nanotube solutions. Sonication and strong shear hydrodynamic forces lead to the breaking of the monolayered nanotubes into small particles, which then associate into large colloidal particles.
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Affiliation(s)
- Zoubir El-Hachemi
- Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain.
| | | | - J Lourdes Campos
- Department of Chemical Engineering, Polytechnic University of Catalonia (UPC), Av. Diagonal 647, Barcelona, Catalonia, 08028, Spain
| | - Sergio Cespedes
- Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain
| | - Joaquim Crusats
- Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain
| | - Carlos Escudero
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain
| | - Christina S Kamma-Lorger
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain
| | - Joan Llorens
- Department of Chemical Engineering, University of Barcelona, c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain
| | - Marc Malfois
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain
| | - Geoffrey R Mitchell
- Center for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Rua de Portugal, 2430-028 Marinha Grande, Portugal
| | - Ana P Tojeira
- Center for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Rua de Portugal, 2430-028 Marinha Grande, Portugal
| | - Josep M Ribó
- Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain.
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126
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Sorrenti A, Rodriguez-Trujillo R, Amabilino DB, Puigmartí-Luis J. Milliseconds Make the Difference in the Far-from-Equilibrium Self-Assembly of Supramolecular Chiral Nanostructures. J Am Chem Soc 2016; 138:6920-3. [DOI: 10.1021/jacs.6b02538] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alessandro Sorrenti
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari de Bellaterra, 08193 Cerdanyola del Vallès,Catalonia, Spain
| | - Romen Rodriguez-Trujillo
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari de Bellaterra, 08193 Cerdanyola del Vallès,Catalonia, Spain
| | - David B. Amabilino
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari de Bellaterra, 08193 Cerdanyola del Vallès,Catalonia, Spain
- School
of Chemistry, The University of Nottingham, University Park NG7 2RD, United Kingdom
| | - Josep Puigmartí-Luis
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari de Bellaterra, 08193 Cerdanyola del Vallès,Catalonia, Spain
- Swiss Federal Laboratories for Materials Science and Technology (EMPA), Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
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127
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Potticary J, Terry LR, Bell C, Papanikolopoulos AN, Christianen PCM, Engelkamp H, Collins AM, Fontanesi C, Kociok-Köhn G, Crampin S, Da Como E, Hall SR. An unforeseen polymorph of coronene by the application of magnetic fields during crystal growth. Nat Commun 2016; 7:11555. [PMID: 27161600 PMCID: PMC4866376 DOI: 10.1038/ncomms11555] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 04/07/2016] [Indexed: 11/27/2022] Open
Abstract
The continued development of novel drugs, proteins, and advanced materials strongly rely on our ability to self-assemble molecules in solids with the most suitable structure (polymorph) in order to exhibit desired functionalities. The search for new polymorphs remains a scientific challenge, that is at the core of crystal engineering and there has been a lack of effective solutions to this problem. Here we show that by crystallizing the polyaromatic hydrocarbon coronene in the presence of a magnetic field, a polymorph is formed in a β-herringbone structure instead of the ubiquitous γ-herringbone structure, with a decrease of 35° in the herringbone nearest neighbour angle. The β-herringbone polymorph is stable, preserves its structure under ambient conditions and as a result of the altered molecular packing of the crystals, exhibits significant changes to the optical and mechanical properties of the crystal.
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Affiliation(s)
- Jason Potticary
- Complex Functional Materials Group, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Lui R. Terry
- Complex Functional Materials Group, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
| | - Christopher Bell
- School of Physics, HH Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL, UK
| | | | - Peter C. M. Christianen
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Hans Engelkamp
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Andrew M. Collins
- Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL, UK
| | - Claudio Fontanesi
- Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK
- Dipartimento di Ingegneria Enzo Ferrari, Universita' di Modena e Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy
| | | | - Simon Crampin
- Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Enrico Da Como
- Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Simon R. Hall
- Complex Functional Materials Group, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
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128
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Electrooptic Kerr effect of porphyrin H-aggregates in polymer films: Polymer specific spectral blue shift. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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129
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Di Mauro A, Randazzo R, Spanò SF, Compagnini G, Gaeta M, D'Urso L, Paolesse R, Pomarico G, Di Natale C, Villari V, Micali N, Fragalà ME, D'Urso A, Purrello R. Vortexes tune the chirality of graphene oxide and its non-covalent hosts. Chem Commun (Camb) 2016; 52:13094-13096. [PMID: 27549164 DOI: 10.1039/c6cc05177d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ability of vortexes to tune the chirality of graphene oxide in water sheds light on its complex supramolecular organization allowing for selective noncovalent deposition of a predetermined handedness on a solid surface.
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130
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Arteaga O, El-Hachemi Z, Canillas A, Crusats J, Rovira M, Ribó JM. Reversible and irreversible emergence of chiroptical signals in J-aggregates of achiral 4-sulfonatophenyl substituted porphyrins: intrinsic chirality vs. chiral ordering in the solution. Chem Commun (Camb) 2016; 52:10874-7. [DOI: 10.1039/c6cc05709h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Different origins of the reversible and irreversible emergence of chiroptical signals in the title J-aggregates.
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Affiliation(s)
- Oriol Arteaga
- Department of Applied Physics
- University of Barcelona
- E-08028 Barcelona
- Spain
- FEMAN Group
| | - Zoubir El-Hachemi
- Departament de Quimica Inorgànica I Orgànica
- Seccció d’Orgànica
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
| | - Adolf Canillas
- Department of Applied Physics
- University of Barcelona
- E-08028 Barcelona
- Spain
- FEMAN Group
| | - Joaquim Crusats
- Departament de Quimica Inorgànica I Orgànica
- Seccció d’Orgànica
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
| | - Meritxell Rovira
- Departament de Quimica Inorgànica I Orgànica
- Seccció d’Orgànica
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
| | - Josep M. Ribó
- Departament de Quimica Inorgànica I Orgànica
- Seccció d’Orgànica
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
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131
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Shen Z, Jiang Y, Wang T, Liu M. Symmetry Breaking in the Supramolecular Gels of an Achiral Gelator Exclusively Driven by π-π Stacking. J Am Chem Soc 2015; 137:16109-15. [PMID: 26647220 DOI: 10.1021/jacs.5b10496] [Citation(s) in RCA: 177] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Supramolecular symmetry breaking, in which chiral assemblies with imbalanced right- and left-handedness emerge from achiral molecular building blocks, has been achieved in the organogels of a C3-symmetric molecule only via π-π stacking. Specifically, an achiral C3-symmetric benzene-1,3,5-tricarboxylate substituted with methyl cinnamate through ester bond was found to form organogels in various organic solvents. More interestingly, when gels formed in cyclohexane, symmetry breaking occurred; i.e., optically active organogels together with the helical nanofibers with predominant handedness were obtained. Furthermore, the stochastically appeared imbalanced helicity could be driven to desired handedness by utilizing slight chiral solvents such as (R)- or (S)-terpinen-4-ol. Remarkably, the handedness of supramolecular assemblies thus formed could be kept even when the chiral solvents were removed. For the first time, we show that symmetry breaking can occur in supramolecular gel system driven exclusively through π-π stacking.
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Affiliation(s)
- Zhaocun Shen
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Yuqian Jiang
- National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Tianyu Wang
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , 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 , Beijing 100190, P. R. China.,National Center for Nanoscience and Technology, Beijing 100190, P. R. China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China
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132
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133
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Mogi I, Aogaki R, Watanabe K. Tailoring of Surface Chirality by Micro-Vortices and Specific Adsorption in Magnetoelectrodeposition. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150208] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Iwao Mogi
- Institute for Materials Research, Tohoku University
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134
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Peng C, Lavrentovich OD. Chirality amplification and detection by tactoids of lyotropic chromonic liquid crystals. SOFT MATTER 2015; 11:7257-63. [PMID: 26238525 DOI: 10.1039/c5sm01632k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Detection of chiral molecules requires amplification of chirality to measurable levels. Typically, amplification mechanisms are considered at the microscopic scales of individual molecules and their aggregates. Here we demonstrate chirality amplification and visualization of structural handedness in water solutions of organic molecules that extends over the scale of many micrometers. The mechanism is rooted in the long-range elastic nature of orientational order in lyotropic chromonic liquid crystals (LCLCs) formed in water solutions of achiral disc-like molecules. The nematic LCLC coexists with its isotropic counterpart, forming elongated tactoids; the spatial confinement causes a structural twist even when the material is nonchiral. Minute quantities of chiral molecules such as the amino acid l-alanine and limonene transform the racemic array of left- and right-twisted tactoids into a homochiral set. The left and right chiral enantiomers are readily distinguished from each other as the induced structural handedness is visualized through a simple polarizing microscope observation. The effect is important for developing our understanding of chirality amplification mechanisms; it also might open up new possibilities in biosensing.
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Affiliation(s)
- Chenhui Peng
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, USA.
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135
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Mineo P, Villari V, Scamporrino E, Micali N. New Evidence about the Spontaneous Symmetry Breaking: Action of an Asymmetric Weak Heat Source. J Phys Chem B 2015; 119:12345-53. [PMID: 26315854 DOI: 10.1021/acs.jpcb.5b07199] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In the present study, we show how, in a stagnant water solution of uncharged aggregated achiral porphyrin-based molecules, a mirror-symmetry breaking (SB) can be induced and controlled by means of a weak asymmetric thermal gradient. In particular, it is shown that the optical activity of the aggregate porphyrin solution can be generated and reversed, in sign, only acting on the thermal ramp direction (heating or cooling). In order to avoid data misinterpretation, the aggregate structure modifications with the temperature change and the linear dichroism contribution to circular dichroism spectra were evaluated. A model simulation, using a finite element analysis approach describing the thermal flows, shows that small thermal gradients are able to give rise to asymmetric heat flow. The results reported here can be considered new evidence about the spontaneous symmetry breaking phenomenon induced by very weak forces having an important role in the natural chiral selective processes.
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Affiliation(s)
- Placido Mineo
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, Università di Catania , Viale Andrea Doria 6, I-95125 Catania, Italy.,CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
| | - Valentina Villari
- CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
| | - Emilio Scamporrino
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, Università di Catania , Viale Andrea Doria 6, I-95125 Catania, Italy
| | - Norberto Micali
- CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
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136
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Affiliation(s)
- 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, People's Republic of China
| | - Li Zhang
- 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, People's Republic of China
| | - Tianyu Wang
- 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, People's Republic of China
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137
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Marino N, Armentano D, Pardo E, Vallejo J, Neve F, Di Donna L, De Munno G. Homochiral self-assembly of biocoordination polymers: anion-triggered helicity and absolute configuration inversion. Chem Sci 2015; 6:4300-4305. [PMID: 29218199 PMCID: PMC5707485 DOI: 10.1039/c5sc01089f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 04/21/2015] [Indexed: 01/28/2023] Open
Abstract
The different natures of the weakly coordinating anions - triflate or perchlorate - in the Cu2+-mediated self-assembly of cytidine monophosphate nucleotide play a fundamental role in the homochiral resolution process, yielding one-dimensional copper(ii) coordination polymers of opposite helicity that can be easily inverted, in a reversible way, by changing the nature of the anion as revealed by circular dichroism experiments both in solution and in the solid state.
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Affiliation(s)
- Nadia Marino
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036, Arcavacata di Rende , Cosenza , Italy .
- Department of Chemistry , Syracuse University Syracuse , NY 13244-4100 , USA
| | - Donatella Armentano
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036, Arcavacata di Rende , Cosenza , Italy .
| | - Emilio Pardo
- Departament de Química Inorgànica , Instituto de Ciencia Molecular (ICMOL) , Universitat de València , 46980 Paterna , València , Spain
| | - Julia Vallejo
- Departament de Química Inorgànica , Instituto de Ciencia Molecular (ICMOL) , Universitat de València , 46980 Paterna , València , Spain
| | - Francesco Neve
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036, Arcavacata di Rende , Cosenza , Italy .
| | - Leonardo Di Donna
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036, Arcavacata di Rende , Cosenza , Italy .
| | - Giovanni De Munno
- Dipartimento di Chimica e Tecnologie Chimiche , Università della Calabria , 87036, Arcavacata di Rende , Cosenza , Italy .
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138
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Micali N, Vybornyi M, Mineo P, Khorev O, Häner R, Villari V. Hydrodynamic and Thermophoretic Effects on the Supramolecular Chirality of Pyrene-Derived Nanosheets. Chemistry 2015; 21:9505-13. [PMID: 26012534 DOI: 10.1002/chem.201500932] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Indexed: 01/13/2023]
Abstract
Chiroptical properties of two-dimensional (2D) supramolecular assemblies (nanosheets) of achiral, charged pyrene trimers (Py3 ) are rendered chiral by asymmetric physical perturbations. Chiral stimuli in a cuvette can originate either from controlled temperature gradients or by very gentle stirring. The chiroptical activity strongly depends on the degree of supramolecular order of the nanosheets, which is easily controlled by the method of preparation. The high degree of structural order ensures strong cooperative effects within the aggregates, rendering them more susceptible to external stimuli. The samples prepared by using slow thermal annealing protocols are both CD and LD active (in stagnant and stirred solutions), whereas for isothermally aged samples chiroptical activity was in all cases undetectable. In the case of temperature gradients, the optical activity of 2D assemblies could be recorded for a stagnant solution due to migration of the aggregates from the hottest to the coldest regions of the system. However, a considerably stronger exciton coupling, coinciding with the J-band of the interacting pyrenes, is developed upon subtle vortexing (0.5 Hz, 30 rpm) of the aqueous solution of the nanosheets. The sign of the exciton coupling is inverted upon switching between clockwise and counter-clockwise rotation. The supramolecular chirality is evidenced by the appearance of CD activity. To exclude artefacts from proper CD spectra, the contribution from LD to the observed CD was determined. The data suggest that the aggregates experience asymmetrical deformation and alignment effects because of the presence of chiral flows.
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Affiliation(s)
- Norberto Micali
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, Messina (Italy)
| | - Mykhailo Vybornyi
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland)
| | - Placido Mineo
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, Messina (Italy).,Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, University of Catania, Viale Andrea Doria 6, 95125 Catania (Italy)
| | - Oleg Khorev
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland)
| | - Robert Häner
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland).
| | - Valentina Villari
- CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, Messina (Italy).
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139
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Yin P, Zhang ZM, Lv H, Li T, Haso F, Hu L, Zhang B, Bacsa J, Wei Y, Gao Y, Hou Y, Li YG, Hill CL, Wang EB, Liu T. Chiral recognition and selection during the self-assembly process of protein-mimic macroanions. Nat Commun 2015; 6:6475. [DOI: 10.1038/ncomms7475] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 02/02/2015] [Indexed: 11/09/2022] Open
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140
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Baldwin KA, Butler SL, Hill RJA. Artificial tektites: an experimental technique for capturing the shapes of spinning drops. Sci Rep 2015; 5:7660. [PMID: 25564381 PMCID: PMC4288211 DOI: 10.1038/srep07660] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 12/03/2014] [Indexed: 11/22/2022] Open
Abstract
Determining the shapes of a rotating liquid droplet bound by surface tension is an archetypal problem in the study of the equilibrium shapes of a spinning and charged droplet, a problem that unites models of the stability of the atomic nucleus with the shapes of astronomical-scale, gravitationally-bound masses. The shapes of highly deformed droplets and their stability must be calculated numerically. Although the accuracy of such models has increased with the use of progressively more sophisticated computational techniques and increases in computing power, direct experimental verification is still lacking. Here we present an experimental technique for making wax models of these shapes using diamagnetic levitation. The wax models resemble splash-form tektites, glassy stones formed from molten rock ejected from asteroid impacts. Many tektites have elongated or ‘dumb-bell' shapes due to their rotation mid-flight before solidification, just as we observe here. Measurements of the dimensions of our wax ‘artificial tektites' show good agreement with equilibrium shapes calculated by our numerical model, and with previous models. These wax models provide the first direct experimental validation for numerical models of the equilibrium shapes of spinning droplets, of importance to fundamental physics and also to studies of tektite formation.
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Affiliation(s)
- Kyle A Baldwin
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Samuel L Butler
- Department of Geological Sciences, University of Saskatchewan, Saskatoon Saskatchewan, S7N 5E2, Canada
| | - Richard J A Hill
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
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141
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Bejagam KK, Kulkarni C, George SJ, Balasubramanian S. External electric field reverses helical handedness of a supramolecular columnar stack. Chem Commun (Camb) 2015; 51:16049-52. [DOI: 10.1039/c5cc05569e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A supramolecular columnar stack aligns its macrodipole vector to an external electric field by reversing its handedness.
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Affiliation(s)
- Karteek K. Bejagam
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)
- Bangalore 560 064
- India
| | - Chidambar Kulkarni
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)
- Bangalore 560 064
- India
- New Chemistry Unit
| | | | - Sundaram Balasubramanian
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)
- Bangalore 560 064
- India
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142
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Pietra F, Rabouw FT, van Rhee PG, van Rijssel J, Petukhov AV, Erné BH, Christianen PCM, de Mello Donegá C, Vanmaekelbergh D. Self-assembled CdSe/CdS nanorod sheets studied in the bulk suspension by magnetic alignment. ACS NANO 2014; 8:10486-10495. [PMID: 25197767 DOI: 10.1021/nn503857t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We studied spontaneously self-assembled aggregates in a suspension of CdSe/CdS core/shell nanorods (NRs). The influence of the length and concentration of the NRs and the suspension temperature on the size of the aggregates was investigated using in situ small-angle X-ray scattering (SAXS) and linear dichroism (LD) measurements under high magnetic fields (up to 30 T). The SAXS patterns reveal the existence of crystalline 2-dimensional sheets of ordered NRs with an unusually large distance between the rods. The LD measurements show that the size of the sheets depends on the free-energy driving force for NR self-assembly. More precisely, the sheets are larger if the attraction between NRs is stronger, if the temperature is lower, or if the NR concentration is higher. We show that the formation of large NR sheets is a slow process that can take days. Our in situ results of the structures that spontaneously form in the bulk suspension could further our understanding of NR self-assembly into mono- or multilayer superlattices that occurs at the suspension/air interface upon evaporation of the solvent.
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Affiliation(s)
- Francesca Pietra
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science , Princetonplein 1, 3584 CC Utrecht, The Netherlands
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143
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Shen Z, Wang T, Liu M. Macroscopic Chirality of Supramolecular Gels Formed from Achiral Tris(ethyl cinnamate) Benzene-1,3,5-tricarboxamides. Angew Chem Int Ed Engl 2014; 53:13424-8. [DOI: 10.1002/anie.201407223] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/25/2014] [Indexed: 12/11/2022]
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144
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Shen Z, Wang T, Liu M. Macroscopic Chirality of Supramolecular Gels Formed from Achiral Tris(ethyl cinnamate) Benzene-1,3,5-tricarboxamides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407223] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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145
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Harada T, Moriyama H, Takahashi H, Umemura K, Yokota H, Kawakami R, Mishima K. Spectroscopic characterization of supramolecular chiral porphyrin homoassociates at the air-water interface. APPLIED SPECTROSCOPY 2014; 68:1235-1240. [PMID: 25286231 DOI: 10.1366/13-07432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The water-soluble 4-sulfonatophenyl meso-substituted porphyrin (TPPS) dye exhibits a transformation to a chiral self-aggregate from the non-aggregated species (diprotonated H4TPPS(2-)) at low concentration (no more than 1 × 10(-5) M). Immobilization of supramolecular chiral porphyrin homoassociates was mediated by the electrostatic interaction between the anionic TPPS molecule and cationic surfactant monolayer at the air-water interface. With the immobilization, a reversible transformation from monomeric TPPS to J-aggregate (M↔J) could be changed into an irreversible (M→J), which is desirable for stabilization of aggregation structure for a long period. The novel finding was achieved using a fine-tuned specialized solid-state circular dichroism (CD) spectrophotometer and derived analytical procedure to obtain artifact-free CD signals. To our knowledge, this is the first report achieving the chiral control of a homoassociate induced by a chiral surfactant at the air-water interface, indicating that the handedness of the formed homoassociate could be determined.
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Affiliation(s)
- Takunori Harada
- Department of Chemical Engineering, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
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146
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Tantussi F, Fuso F, Allegrini M, Micali N, Occhiuto IG, Scolaro LM, Patanè S. Linear and circular dichroism in porphyrin J-aggregates probed by polarization modulated scanning near-field optical microscopy. NANOSCALE 2014; 6:10874-10878. [PMID: 25117553 DOI: 10.1039/c4nr00918e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polarization modulated scanning near-field optical microscopy (PM-SNOM) is effective in detecting circular and linear dichroism with sub-wavelength resolution. PM-SNOM investigation of the chiroptical properties of single ribbon-like nanosized J-aggregates formed by acid induced aggregation of tris-(4-sulfonatophenyl)phenylporphyrin is reported. Linear dichroism maps give evidence of well-organized chromophores packed in linear arrays within the structure of the nanoribbons. Circular dichroism maps indicate that the molecules forming the nanoribbon have an inherently chiral structure at the local scale.
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Affiliation(s)
- Francesco Tantussi
- Dipartimento di Fisica "Enrico Fermi" and CNISM, Università di Pisa, Istituto Nazionale di Ottica INO-CNR, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
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147
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Mogi I, Morimoto R, Aogaki R, Watanabe K. Surface chirality induced by rotational electrodeposition in magnetic fields. Sci Rep 2014; 3:2574. [PMID: 23999254 PMCID: PMC3759836 DOI: 10.1038/srep02574] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 08/15/2013] [Indexed: 11/10/2022] Open
Abstract
The surfaces of minerals could serve important catalytic roles in the prebiotic syntheses of organic molecules, such as amino acids. Thus, the surface chirality is responsible for the asymmetric syntheses of biomolecules. Here, we show induction of the surface chirality of copper metal film by electrodeposition via electrochemical cell rotation in magnetic fields. Such copper film electrodes exhibit chiral behaviour in the electrochemical reaction of alanine enantiomers, and the rotating direction allows control of the chiral sign. These findings are discussed in connection with the asymmetric influence of the system rotation on the magnetohydrodynamic micro-vortices around the electrode surfaces.
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Affiliation(s)
- Iwao Mogi
- Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan.
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148
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149
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Li F, Song Q, Zhang X. Two-dimensional folded nanosheets lead to an unusual circular dichroism effect in aqueous solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6064-6070. [PMID: 24823441 DOI: 10.1021/la501340e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We found that two-dimensional (2D) folded nanosheets with crystalline structure in aqueous solution could induce an unusual time-dependent circular dichroism (CD) effect in the CD measurements after shaking or stirring the solution. In addition, a critical damping curve was observed in the CD spectrum after stop of stirring the solution. The apparent CD effect actually originates from linear dichroism (LD) changes in the oscillations of two-dimensional folded nanosheets and the inherent optical imperfections of the CD instruments. The oscillations of the folded nanosheets should induce this CD effect by the conformational change. Although an unusual apparent CD effect in alignment of one-dimensional (1D) dye-containing supramolecular nanofibers has been documented, this study reports for the first time that 2D folded nanosheets can lead to such a CD effect. It is anticipated that the method may provide a way to spectroscopically visualize the dynamic conformational change of self-assemblies in solutions.
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Affiliation(s)
- Fei Li
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, China
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150
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Donato MG, Hernandez J, Mazzulla A, Provenzano C, Saija R, Sayed R, Vasi S, Magazzù A, Pagliusi P, Bartolino R, Gucciardi PG, Maragò OM, Cipparrone G. Polarization-dependent optomechanics mediated by chiral microresonators. Nat Commun 2014; 5:3656. [DOI: 10.1038/ncomms4656] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 03/14/2014] [Indexed: 11/09/2022] Open
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