Imidazobenzimidazole fused aza-calix[4]arenes:Synthesis,structure,and Zn^(2+)-selective colorimetric-fluorometric sensor  

作　　者：Yuan-Tao Huang Min Xue Yong Yang 

机构地区：[1]Department of Chemistry,Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China [2]Department of Physics,Key Laboratory of Optical Field Manipulation of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Chinese Chemical Letters》2023年第12期204-208,共5页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.21971223 and 21772178).

摘　　要：Tetra(amino)azacalix[4]arene skeleton was functionalized at the bridging NH sites using various aromatic aldehydes via formation of imidazobenzimidazole fused heterocycles.X-ray single crystal analysis revealed distorted 1,3-alternate conformations for the resulting macrocycles.Anthracenyl and pyrenyl modified imidazobenzimidazole fused aza-calix[4]arenes existed as dimers in the solid state,associated mainly through-stacking interactions between the planar polycyclic fluorophores.The tetrapyrenyl modified product was further used as a Zn^(2+)-selective sensor,which showed naked-eye detected color change and enhanced excimer emission.The stoichiometry between the sensor and Zn2+was determined to be 1:1 and the association constant was 1.1×10^(5)L/mol.The sensing process was highly selective and showed strong anti-interference with presence of other cations.The UV-vis spectral changes in the sensing process were completely reversible by alternate addition of Zn^(2+) and F^(-),showing an efficient“on-off-on”result.

关 键 词：arene Imidazobenzimidazole Fluorometric sensor Zn^(2+)-selective 

分 类 号：O657.3[理学—分析化学] TP212[理学—化学] O626[自动化与计算机技术—检测技术与自动化装置]