Sensitive and Selective Fluorescent and Colorimetric Sensor for Ag^＋ Based on the Supramolecular Self-Assembly in Semi-Water  

作　　者：Taibao Wei Haili Zhang Wenting Li Wenjuan Qu Junxia Su Qi Lin Youming Zhang Hong Yao 

机构地区：[1]Key Laboratory of Eco-Environment-Related Polymer Materials,Ministry of Education of China,Key Laboratory of Polymer Materials of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou,Gansu 730070,China

出　　处：《Chinese Journal of Chemistry》2017年第8期1311-1316,共6页中国化学（英文版）

基　　金：Acknowledgement This work was supported by the National Natural Science Foundation of China （Nos. 21161018, 21262032, 21574104）, the Program for Chang Jiang Scholars and hmovative Research Team in University of Ministry of Education of China （No. IRT1177）.

摘　　要：Specific recognition of ultratrace levels of ions in semi-water using super-quicker methods is still a challenge for environmental monitoring. Herein we report a fluorescent and colormetric sensor （ZH） based on supramolecular self-assembly, whose structure was destroyed by the addition of ultratrace of silver ions. The process promoted either naked eye visible color changes or fluorescence intensity quenched in conjunction with a wide pH range. Systematic studies revealed very high selectivity （0.07 μmol/L） for silver ions, and other common cations, e.g., Hg^2＋, Cu^2＋, Cd^2＋, Pb^2＋ had nearly no influence on the sensing behavior. This sensor also served as a multiple use of component in sensing materials by addition of I^- into the mixture of ZH and Ag^＋ （about 5 times）. What＇s more, ZH containing filter paper emerged distinct color and fluorescence changes upon exposure to silver （Ag^＋）, which could be used as a portable method to undertake field testing for Ag^＋.Specific recognition of ultratrace levels of ions in semi-water using super-quicker methods is still a challenge for environmental monitoring. Herein we report a fluorescent and colormetric sensor （ZH） based on supramolecular self-assembly, whose structure was destroyed by the addition of ultratrace of silver ions. The process promoted either naked eye visible color changes or fluorescence intensity quenched in conjunction with a wide pH range. Systematic studies revealed very high selectivity （0.07 μmol/L） for silver ions, and other common cations, e.g., Hg^2＋, Cu^2＋, Cd^2＋, Pb^2＋ had nearly no influence on the sensing behavior. This sensor also served as a multiple use of component in sensing materials by addition of I^- into the mixture of ZH and Ag^＋ （about 5 times）. What＇s more, ZH containing filter paper emerged distinct color and fluorescence changes upon exposure to silver （Ag^＋）, which could be used as a portable method to undertake field testing for Ag^＋.

关 键 词：supramolecular self-assembly silver （Ag^＋） DUAL-CHANNEL aqueous solution 

分 类 号：TQ126.35[化学工程—无机化工] TB383[一般工业技术—材料科学与工程]