文献类型：期刊文献

英文题名：A novel colorimetric and fluorometric probe for the detection of CN- with high selectivity in aqueous media

作者：Sun, Guangchen[1,2];Chen, Wei[1,2];Liu, Yang[1,2];Jin, Xin[1,2];Zhang, Zhiyun[1,2];Su, Jianhua[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2020

卷号：176

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20200608123781);WOS:【SCI-EXPANDED(收录号:WOS:000519335300048)】；

基金：We thank the financial support from the NSFC/China (21788102, 21905090, 21790361), Shanghai Municipal Science and Technology Major Project (Grant No.2018SHZDZX03), the Programme of Introducing Talents of Discipline to Universities (B16017), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and Natural Science Foundation of Shanghai (19ZR1412200).

语种：英文

外文关键词：Dihydrophenazine; Intramolecular charge transfer; Colorimetric; Fluorometric; Cyanide

摘要：A novel colorimetric and fluorometric probe L1 for detecting CN- with high selectivity was constructed and synthesized based on intramolecular charge transfer (ICT). Remarkably, L1 was found to be exclusively responsive to CN- via nucleophilic attack of dicyanovinyl group via H-1 NMR titration experiment. The detection system exhibited "turn-on" fluorescence with the addition of cyanide, which was opposite to previously reported fluorescence quenching probes with the same sensing process. Moreover, the detection limit of L1 for CN- was determined to be 1.1 mu M, lower than the standard (1.9 mu M) regulated by the World Health Organization (WHO). This work demonstrated that L1 could serve as both a colorimetric and a fluorimetric sensor for cyanide detection in pure water, making it possible for the applications of cyanide detection in water.