文献类型：期刊文献

英文题名：Host-guest assembly triggered lower critical solution temperature behavior with reversible photo-regulation

作者：Xu, Zhuoran[1];Liu, Xiujun[1];Jiang, Tao[1];Ma, Xiang[1]

机构：[1]East China Univ Sci & Technol, Lab Adv Mat, Sch Chem & Mol Engn, Meilong Rd 130, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2024

卷号：233

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20240315396583);WOS:【SCI-EXPANDED(收录号:WOS:001159081000001)】；

语种：英文

外文关键词：Lower critical solution temperature; Stimulus responsive system; Supramolecular assembly; Host-guest assembly

摘要：The less frequent lower critical solution temperature (LCST) phenomenon has attracted extensive attention due to the foresighted application in smart materials. Nevertheless, the existing LCST-type materials are mainly dominated by a few polymers with specific moieties due to the damped hydration at a higher temperature and the lack of reversible regulations of the corresponding temperature sensitivity. Herein, an unanticipated and reversibly photo-responsive LCST behavior was uncovered in the BSC4/Azo-4 assembly solution. Such behavior arose from the host-guest binding between BSC4 and Azo-4 in an aqueous solution since neither the guest nor host alone exhibited an LCST property. Ascribing to the distinct pi-pi stacking between the trans- and cis-isomers of Azo-4, a reversible regulation of LCST behavior was achieved by irradiating UV and blue light alternately. Our study demonstrated the complexity and possibility of supramolecular self-assembly, opening a new avenue in the fabrication and adjustment of LCST-type materials in the future.