文献类型：期刊文献

英文题名：ESIPT-AIE active Schiff base based on 2-(2 '-hydroxyphenyl)benzo-thiazole applied as multi-functional fluorescent chemosensors

作者：Zheng, Han-Wen[1];Kang, Yang[1];Wu, Min[1];Liang, Qiong-Fang[1];Zheng, Jian-Quan[2];Zheng, Xiang-Jun[1];Jin, Lin-Pei[1]

第一作者：Zheng, Han-Wen

通讯作者：Zheng, XJ[1]

机构：[1]Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;[2]Beijing Union Univ, Beijing Key Lab Bioact Subst & Funct Foods, Beijing 100191, Peoples R China

第一机构：Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

通讯机构：[1]corresponding author), Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China.

年份：2021

卷号：50

期号：11

起止页码：3916-3922

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20211310136604);Scopus(收录号：2-s2.0-85103058437);WOS:【SCI-EXPANDED(收录号:WOS:000631597500019)】；

基金：The authors acknowledge the financial support from the National Natural Science Foundation of China (21671022).

语种：英文

外文关键词：Atoms - Excited states - Metal ions - Metals - Nitrogen - Single crystals

摘要：Three AIE (aggregation-induced emission)-ESIPT (excited-state intramolecular proton transfer) active 2-(2-hydroxyphenyl)benzothiazole derivatives, HL1, HL2 and HL3 with one, two and three rotatable phenyl groups, were obtained and characterized. Their AIE properties in THF/HEPES solution were investigated in detail. HL2 shows the best AIE performance with 71-fold fluorescence enhancement, while HL3 only shows a 9-fold enhancement. With the AIE property, HL1 and HL2 could act as fluorescence chemosensors to detect Cu2+ ions via the "turn off" mode in THF/HEPES media. With the ESIPT property, HL1 and HL2 could also detect Zn2+ ions via the "turn on" mode in EtOH/HEPES media. During the detection process, both demonstrate rapid response and high contrast before and after the addition of metal ions. The species formed in the detection system were investigated. The results of X-ray single-crystal diffraction confirm that Zn2+ is coordinated with the oxygen atom and Schiff base nitrogen atom instead of the benzothiazole nitrogen atom in the tetrahedron geometry. Moreover, the chemosensors were successfully constructed into handy fluorescence test papers for Cu2+ and Zn2+ detection.