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Lago-Silva M, Fernández-Míguez M, Rodríguez R, Quiñoá E, Freire F. Stimuli-responsive synthetic helical polymers. Chem Soc Rev 2024; 53:793-852. [PMID: 38105704 DOI: 10.1039/d3cs00952a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Synthetic dynamic helical polymers (supramolecular and covalent) and foldamers share the helix as a structural motif. Although the materials are different, these systems also share many structural properties, such as helix induction or conformational communication mechanisms. The introduction of stimuli responsive building blocks or monomer repeating units in these materials triggers conformational or structural changes, due to the presence/absence of the external stimulus, which are transmitted to the helix resulting in different effects, such as assymetry amplification, helix inversion or even changes in the helical scaffold (elongation, J/H helical aggregates). In this review, we show through selected examples how different stimuli (e.g., temperature, solvents, cations, anions, redox, chiral additives, pH or light) can alter the helical structures of dynamic helical polymers (covalent and supramolecular) and foldamers acting on the conformational composition or molecular structure of their components, which is also transmitted to the macromolecular helical structure.
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Affiliation(s)
- María Lago-Silva
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Manuel Fernández-Míguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Félix Freire
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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Kulkarni C, Sakaino H, Vantomme G, Meskers SCJ. Circular depolarization spectroscopy: A new tool to study photo-imprinting of chirality. Chirality 2023; 35:147-154. [PMID: 36636906 PMCID: PMC10108228 DOI: 10.1002/chir.23527] [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: 10/25/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 01/14/2023]
Abstract
When irradiating a molecular material containing photo-isomerizable groups with pure circularly polarized light, a particular handedness may get imprinted into the material. To study the mechanism and kinetics of this process in situ and operando, we have developed a new chiroptical tool where the circular polarization of the incident circularly polarized light is monitored after transmission through the photoactive layer. Practical limits to the resolution and sensitivity of the measurements as well as its calibration are discussed. To aid interpretation of experimental results, we present kinetic Monte Carlo simulations on a model for the active material involving photo-induced reorientation of molecules in a cholesteric organization. The simulations support the interpretation of a transient minimum in the degree of circular polarization of the transmitted light in terms of a nematic transient state during photo-inversion of a cholesteric organization in the molecular material.
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Affiliation(s)
- Chidambar Kulkarni
- Institute for Complex Molecular Systems and Molecular Materials and Nanosystems, Eindhoven University of Technology, Eindhoven, Netherlands.,Department of Chemistry, Indian Institute of Technology (IIT) Bombay, Mumbai, India
| | - Hirotoshi Sakaino
- Institute for Complex Molecular Systems and Molecular Materials and Nanosystems, Eindhoven University of Technology, Eindhoven, Netherlands.,Electronic & Imaging Materials Research Laboratories, Toray Industries, Inc., Otsu, Shiga, Japan
| | - Ghislaine Vantomme
- Institute for Complex Molecular Systems and Molecular Materials and Nanosystems, Eindhoven University of Technology, Eindhoven, Netherlands
| | - Stefan C J Meskers
- Institute for Complex Molecular Systems and Molecular Materials and Nanosystems, Eindhoven University of Technology, Eindhoven, Netherlands
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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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Yang F, Yue B, Zhu L. Light-triggered Modulation of Supramolecular Chirality. Chemistry 2023; 29:e202203794. [PMID: 36653305 DOI: 10.1002/chem.202203794] [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: 12/05/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/20/2023]
Abstract
Dynamically controlling the supramolecular chirality is of great significance in development of functional chiral materials, which is thus essential for the specific function implementation. As an external energy input, light is remote and accurate for modulating chiral assemblies. In non-polarized light control, some photochemically reactive units (e. g., azobenzene, ɑ-cyanostilbene, spiropyran, anthracene) or photo-induced directionally rotating molecular motors were designed to drive chiral transfer or amplification. Besides, photoexcitation induced assembly based physical approach was also explored recently to regulate supramolecular chirality beyond photochemical reactions. In addition, circularly polarized light was applied to induce asymmetric arrangement of organic molecules and asymmetric photochemical synthesis of inorganic metallic nanostructures, in which both wavelength and handedness of circularly polarized light have effects on the induced supramolecular chirality. Although light-triggered chiral assemblies have been widely applied in photoelectric materials, biomedical fields, soft actuator, chiral catalysis and chiral sensing, there is a lack of systematic review on this topic. In this review, we summarized the recent studies and perspectives in the constructions and applications of light-responsive chiral assembled systems, aiming to provide better knowledge for the development of multifunctional chiral nanomaterials.
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Affiliation(s)
- Fan Yang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. China
| | - Bingbing Yue
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. China.,State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China
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Zhu Z, Pan X, Zhang W, Li H, Wang W, He Y. Amphiphilic block copolymer with diazonium salt pendant groups: Synthesis, self-assembly and post-modification. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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