Selective detection of Zn^(2+) and Cd^(2+) ions in water using a host-guest complex between chromone and Q[7]

作     者：Zhishu Zeng Yunqian Zhang Xiaodong Zhang Guangyan Luo Jun Xie Zhu Tao Qianjun Zhang Zhishu Zeng;Yunqian Zhang;Xiaodong Zhang;Guangyan Luo;Jun Xie;Zhu Tao;Qianjun Zhang

作者机构：Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou ProvinceGuizhou UniversityGuiyang 550025China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第8期

页      面：2572-2576页

核心收录：

学科分类：082803[工学-农业生物环境与能源工程] 081704[工学-应用化学] 07[理学] 08[工学] 0828[工学-农业工程] 0817[工学-化学工程与技术] 0804[工学-仪器科学与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：support from the Science and Technology Support Plan of Guizhou Province [Guizhou Science and Technology Cooperation Support (2020) 4Y218] 

主　　题：Chromone Cucurbituril Host-guest interaction Selective detection Zn^(2+)and Cd^(2+) 

摘      要：In this paper,the host-guest interaction of cucurbit[7]uril(Q[7]) and chromone(CMO) has been developed as a fluorescent probe for the highly selective detection of Zn2+ and Cd^(2+) in water based on a chelation-enhanced fluorescence(CHEF) *** was a good linear relationship between the fluorescence intensity of the CMO@Q[7] probe and the concentration of Zn^(2+ )or Cd^(2+) in the range of 0-3.0×10^(-5) mol/L and the detection limit for Zn^(2+) and Cd2+ was found to be 2.03×10^(-6) mol/L and 1.89×10^(-6)mol/L,*** X-ray crystal structure indicated that different coordination fashions were triggered by Zn^(2+) and Cd^(2+ )in the CMO@Q[7] complexes,***,both metal ions coordinated with the carbonyl oxygen of CMO,which was encapsulated in the cavity of Q[7],thus leading to the enhancement of recognition fluorescence emission of CMO.