Optically probing molecular shuttling motion of[2]rotaxane by a conformation-adaptive fluorophore  

作　　者：Chengyuan Yu Xiaodong Wang Cai-Xin Zhao Shun Yang Jiaan Gan Zhuo Wang Zhanqi Cao Da-Hui Qu 

机构地区：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai Gantian Optical Material Co.,Ltd.,Shanghai 201512,China [3]College of Science,Henan Agricultural University,Zhengzhou 450002,China

出　　处：《Chinese Chemical Letters》2022年第11期4904-4907,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22025503,21790361 and 21871084);Shanghai Municipal Science and Technology Major Project(No.2018SHZDZX03);the Fundamental Research Funds for the Central Universities;the Program of Introducing Talents of Discipline to Universities(No.B16017);the Shanghai Science and Technology Committee(No.17520750100);funding from China Postdoctoral Science Foundation funded project(No.J100–5R-20130)。

摘　　要：A bistable[2]rotaxane with a conformation-adaptive macrocycle bearing a 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine(DPAC)unit was synthesized,which could be utilized to optical probe the molecular shuttling motion of the functionalized rotaxane system.The UV-vis,^(1) H NMR and PL spectroscopic data clearly demonstrated that the DPAC ring was interlocked onto the thread and the fluorescence intensity of the DPAC unit in the macrocycle was effectively regulated by the location change of the macrocycle along the thread under acid/base stimulation,which was attributed to the modulation of the intramolecular photo-induced electron transfer between the DPAC unit and the methyltriazole(MTA)unit.This bistable rotaxane system containing a conformation-adaptive fluorophore unit in the macrocycle moiety opens an alternative way to design functional bistable mechanically interlocked molecules.

关 键 词：Rotaxane Optically probe Mechanical shuttling Molecular conformations Conformation-adaptive macrocycle 

分 类 号：O626[理学—有机化学]