Construction of Chiroptical Switch on Silica Nanopartide Surface via Chiral Self-assembly of Side-chain Azobenzene-containing Polymer  

作　　者：Guang-Xing Song Teng-Fei Miao Xiao-Xiao Cheng Hao-Tian Ma Zi-Xiang He Wei Zhang Zheng-Biao Zhang Xiu-Lin Zhu 

机构地区：[1]Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis,Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application,State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou Industrial Park,Suzhou 215123,China

出　　处：《Chinese Journal of Polymer Science》2021年第12期1528-1537,共10页高分子科学（英文版）

基　　金：by the National Natural Science Foundation of China(Nos.21971180 and 92056111);Natural Science Key Basic Research of Jiangsu Province for Higher Education(No.19KJA360006);Postgraduate Research&Practice Innovation Program of Jiangsu Provinee(No.KYCX20_2655);College Students'Innovation and Entrepreneurship Program(No.201910285021Z);the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions and the Program of Innovative Research Team of Soochow University.Prof.W.Zhang thanks Mr.J.Z.Wang in University of Waterloo for English editing.

摘　　要：In this contribution,we utilized surface initiated atom transfer radical polymerization(SI-ATRP)to prepare organicinorganic hybrid core/shell silila nanoparticles(NPs),where silia particles acted as cores and polymeric shells(PAzoMA*)were attached to silica particles via covalent bond.Subsequently,chiroptical switch was sccessfully constructed on silica NPs surface taking advantage of supramolecular chiral self-assembly of the grafted side chain Azo-containing polymer(PAzoMA*).We found that the supramolecular chirality was highly dependent on the molecular weight of grafted PAzoMA*.Meanwhile,the supramolecular chirality could be regulated using 365 nm UV light iradiation and heating cooling treatment,and a reversible supramolecular chiroptical switch could be repeated for over five cycles on silia NPs surface.Moreover,when heated above the glass transition temperature(T_(g))of PAzoMA",the organic-inorganic hybrid nanoparticles(SiO_(2)@PAzoMA*NPs)still exhibited intense DRCD signals.Interestingly,the supramolecular chirality could be retained in solid film for more than 3 months.To conclude,we have prepared an organic inorganic hybrid core/shell chiral slia nanomaterial with dynamic reversible chirality,thermal stability and chiral storage functions,providing potential applications in dynamic asymmetric catalysis,chiral separation and so on.

关 键 词：Silia nanopartides Chiroptical switch Supramolecular chiral assembly Azo containing polymer 

分 类 号：TQ316.322[化学工程—高聚物工业] TB383.1[一般工业技术—材料科学与工程]