Multifaceted regulation of chiroptical properties and self-assembly behaviors of chiral fluorescent polymers  

作　　者：Youling He Junqian Zhang Chaoyang Ma Junkai Liu Jingjing Guo Ting Han Rongrong Hu Bing Shi Li Ben Zhong Tang 

机构地区：[1]Center for AIE Research,Shenzhen Key Laboratory of Polymer Science and Technology,Guangdong Research Center for Interfacial Engineering of Functional Materials,Guangdong Provincial Key Laboratory of New Energy Materials Service Safety,College of Materials Science and Engineering,Shenzhen University,Shenzhen,Guangdong,China [2]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong,China [3]State Key Laboratory of Luminescent Materials and Devices,Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,South China University of Technology,Guangzhou,Guangdong,China [4]Key Laboratory of New Lithium-Ion Battery and Mesoporous Material,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,Guangdong,China [5]Department of Chemistry,Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China [6]School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,21 Nanyang Link,Nanyang,Singapore [7]School of Science and Engineering,Shenzhen Institute of Aggregate Science and Technology,The Chinese University of Hong Kong,Shenzhen(CUHK-Shenzhen),Shenzhen,Guangdong,China

出　　处：《Aggregate》2024年第6期435-446,共12页聚集体(英文)

基　　金：National Natural Science Foundation of China,Grant/Award Number:22271197;Ministry of Science and Technology of China,Grant/Award Number:2021YFA1501600;Guangdong Basic and Applied Basic Research Foundation,Grant/Award Number:2023A1515011578;Natural Science Foundation of Guangdong Province,Grant/Award Number:2021A1515010192;Guangdong Provincial Key Laboratory of Luminescence fromMolecular Aggregates,Grant/Award Number:2019B030301003;Shenzhen Science and Technology Program,Grant/Award Numbers:RCYX20221008092924059,JCYJ20220531102601003,JCYJ20210324094607021;Shenzhen Key Laboratory of Functional Aggregate Materials,Grant/Award Number:ZDSYS20211021111400001;Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,Grant/Award Number:2023B1212060003;2035 Research Excellence Program of Shenzhen University,Grant/Award Number:2023C001。

摘　　要：The multifaceted regulation of the chiroptical properties and self-assembly behaviors of chiral fluorescent polymers is of great significance yet remains challenging to achieve.Herein,a series of novel salen-based chiral fluorescent polymers with aggregation-induced emission and varied substitution manners were facilely and efficiently synthesized.Multiple factors were systematically investigated on the chiroptical properties and self-assembly performance of these polymers,which include molecular structures,solvent environments,metal coordination,and liquid crystal(LC)assemblies.Sutle change in the solvent composition can lead to diverse assembly morphologies of all these chiral polymers,from single-handed helical fibers,helical toroids or loops,to spherical structures,consequently leading to an aggregation-reduced circular dichroism(CD)phenomenon.The polymers bearing salen units show highly selective and reversible coordination with Zn^(2+)and can also induce multiple responses in the absorption,luminescence,CD,and circularly polarized luminescence(CPL)of these chiral fluorescent polymers via a coordination-and dissociation-initiated self-assembly tuning.Furthermore,a small amount of the chiral fluorescent polymer in can induce achiral nematic 4-cyano-4′-n-pentylbiphenyl(5CB)to form ordered chiral nematic LC phase with significant improvement in their CD and CPL signal.The absolute absorption and luminescent dissymmetry factors of the resulting supramolecular assemblies can reach the order of 10^(−1).

关 键 词：aggregation-induced emission CHIRALITY circularly polarized luminescence fluorescent polymers SELFASSEMBLY 

分 类 号：O62[理学—有机化学]