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Zhang F, Shen Z, Sui K, Liu M. Disassembly of spherical structures into nanohelices by good solvent dilution. J Colloid Interface Sci 2024; 657:853-857. [PMID: 38091908 DOI: 10.1016/j.jcis.2023.12.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/30/2023] [Accepted: 12/09/2023] [Indexed: 01/02/2024]
Abstract
Supramolecular self-assembly of low molecular weight molecules into various organic nanostructures has attracted considerable research interest. However, preparing organic nanostructures through a top-down method, such as the disassembly of one large structure into many smaller nanoscale nanostructures, still remains a big challenge. Here, we make use of anti-solvent method to regulate the hierarchical self-assembly of an achiral C3-symmetric molecule in THF/water to prepare various nanostructures, including spherical structures, nanofibers, nanoribbons and nanotwists. Interestingly, the spherical structures could disassemble into nanohelices through good solvent dilution, providing a nanoscale top-down method to prepare organic nanostructures.
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Affiliation(s)
- Fang Zhang
- College of Materials Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, PR China
| | - Zhaocun Shen
- College of Materials Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, PR China.
| | - Kunyan Sui
- College of Materials Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, PR 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, PR China.
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Giuri D, Ravarino P, Tomasini C. Transparent Organogels as a Medium for the Light-Induced Conversion from Spiropyran to Merocyanine. Gels 2023; 9:932. [PMID: 38131918 PMCID: PMC10742928 DOI: 10.3390/gels9120932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 12/23/2023] Open
Abstract
Low-molecular-weight peptide gelators are a versatile class of compounds able to form gels under a variety of conditions, even via simple ultrasound sonication. In this paper, the ability of Boc-L-Phe-D-Oxd-L-Phe-OBn to gelate three organic solvents (toluene, tert-butyl methyl ether, and ethanol) was evaluated. The rheological behaviour of the materials was assessed via strain sweep analysis, while the fibrous network was analysed via optical microscopy on the wet gels. The gel obtained from toluene is a highly transparent material, and the one from ethanol appears translucent, while the one from tert-butyl methyl ether is opaque. These gels were used to study the reversible light-induced transformation from spyropiran (SP) to merocyanine (MC) and back, as a model system to check the effect of the gel medium onto the rection kinetic. We observed that the solvent used to form the organogels has a crucial effect on the reaction, as gels from aprotic solvents stabilize the SP form, while the ones from protic solvents stabilize the MC form. We thus obtained a solid support to stabilize the two photochromic species just by changing the solvent polarity. Moreover, we could demonstrate that the self-assembled gels do not interfere with the light-driven conversion process, either starting from SP or MC, thus representing a valid and economical photochromic material.
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Affiliation(s)
| | | | - Claudia Tomasini
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via Piero Gobetti 85, 40129 Bologna, Italy; (D.G.); (P.R.)
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Yuan L, Chen J, Li Y, Luo G, Gao Z, Zhou C, Li H, Xu P, Zong C. Flexible Azo-Polyimide-Based Smart Surface with Photoregulatable Surface Micropatterns: Toward Rewritable Information Storage and Wrinkle-Free Device Fabrication. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2787-2796. [PMID: 36757158 DOI: 10.1021/acs.langmuir.2c03278] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Stimulus-sensitive materials are of great fascination in surface and interface science owing to their dynamically tunable surface properties and/or morphologies. Herein, we have synthesized an azobenzene-containing polyimide (azo-PI) with enhanced chain flexibility for the fabrication of photosensitive surface patterns on a film/substrate wrinkle system or wrinkle-free devices. The phototriggered cis-trans isomerization kinetics of azobenzene groups in the novel azo-PI with various chain structures were systematically investigated. On the basis of the characteristics of stress relaxation that azobenzene reversible cis-trans isomerization induces in the wrinkled azo-PI film/substrate system, a variety of rewritable visual surface patterns with high resolution and a long legibility time (>30 days) could be easily constructed via visible-light irradiation, enabling the wrinkled azo-PI surfaces to be used as rewritable information storage media. Meanwhile, because of the visible-light irradiation strategy, these photoresponsive surfaces could find potential application in the fabrication of wrinkle-free flexible devices. This study not only sheds light on the influence of the azo-polymer chain structure on its photoresponsive behavior but also provides a versatile strategy for realizing tailor-made smart surface patterns on multilayer functional devices.
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Affiliation(s)
- Liang Yuan
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Jian Chen
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Yuxin Li
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Guangzeng Luo
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Zhilu Gao
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Chunhua Zhou
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Hui Li
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Peiming Xu
- Taishan Sports Industry Group Company, Ltd., Dezhou 253600, P. R. China
- School of Physical Education, Shandong University, Jinan 250061, P. R. China
| | - Chuanyong Zong
- Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
- Taishan Sports Industry Group Company, Ltd., Dezhou 253600, P. R. China
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Zhang Y, Yu W, Li H, Zheng W, Cheng Y. Induced CPL-Active Materials Based on Chiral Supramolecular Co-Assemblies. Chemistry 2023; 29:e202204039. [PMID: 36691189 DOI: 10.1002/chem.202204039] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/22/2023] [Accepted: 01/23/2023] [Indexed: 01/25/2023]
Abstract
Circularly polarized luminescence (CPL) has attracted much interest due to its potential applications on chiral photonic techniques and optoelectronic materials science. As known, dissymmetry factor (gem ) of CPL is one essential factor for evaluating the features of CPL-active materials. Much attention has focused on how to increase the gem value, which is one of the most important issues for CPL practical applications. Recently, more and more works have demonstrated that chiral supramolecular could provide the significant strategy to improve the gem value through the orderly helical superstructure of chiral building blocks. Normally, this kind of chiral supramolecular assembly process can be accompanied by chirality transfer and induction mechanism, which can promote the amplification effect on the induced CPL of achiral dyes. In this review, we fully summarized recent advances on the induced CPL-active materials of chiral supramolecular co-assemblies, their applications in circularly polarized organic light-emitting diodes (CP-OLEDs) and current challenges.
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Affiliation(s)
- Yuxia Zhang
- Nanjing University, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing, 210023, P. R. China.,Nanjing University of Posts and Telecommunications, Key Laboratory for Organic Electronics &, Information Displays (KLOEID) and, Institute of Advanced Materials, National Synergistic Innovation Center for, Advanced Materials (SICAM), Nanjing, 210023, P. R. China
| | - Wenting Yu
- Nanjing University, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing, 210023, P. R. China
| | - Hang Li
- Nanjing University, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing, 210023, P. R. China
| | - Wenhua Zheng
- Nanjing University, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing, 210023, P. R. China
| | - Yixiang Cheng
- Nanjing University, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing, 210023, P. R. China
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