Photodimerization-induced transition of helixes to vesicles based on coumarin-12-crown-4  

作　　者：Hui-Juan Wang Heng-Yi Zhang Wen-Wen Xing Huang Wu Yong-Liang Cui Yu Liu 

机构地区：[1]Department of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Nankai University,Tianjin 300071,China [2]Department of Chemistry,Northwestern University,Evanston,IL 60208,United States

出　　处：《Chinese Chemical Letters》2022年第8期4033-4036,共4页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21861132001,21772099 and21772100)。

摘　　要：Rational construction of fine-tuning and precisely controllable topological nanostructures based on supramolecular self-assembly system remains a challenge.Herein,coumarin-12-crown-4(1)as a building block was synthesized by one-pot method and showed reversible high stereo-selective photodimerization(anti-head-to-head dimer(anti-HH-1):syn-head-to-head dimer(syn-HH-1)=10.8:1)and photocleavage.Helical nanobelts were formed by the self-assembly of 1 through asymmetrical H-bonds,which were in concordance with the crystal state superstructure.Upon irradiation with 365 nm light,these nanobelts transformed into nanoballs which were constructed by three building blocks.Further,we investigated the photoreaction of 1 and got two pure covalent dimers(anti-HH-1 and syn-HH-1).The anti-HH-1 selfassembled into hollow micro-vesicles.The transformation of superstructures based on photo-controlled multiple blocks shines a light to the research on the relationship between molecules and superstructures.

关 键 词：Reversible photodimerization SUPERSTRUCTURES COUMARIN Supramolecular self-assembly Molecular stacking 

分 类 号：O641.3[理学—物理化学]