Sensitive and Selective Fluorescent and Colorimetric Sensor for Ag+ Based on the Supramolecular Self‐Assembly in Semi‐Water. Issue 8 (25th May 2017)

• Record Type: Journal Article
• Authors: Wei, Taibao; Zhang, Haili; Li, Wenting; Qu, Wenjuan; Su, Junxia; Lin, Qi; Zhang, Youming; Yao, Hong
• Is Part Of: Chinese journal of chemistry. Volume 35:Issue 8(2017)
• Page Start: 1311
• Page End: 1316
• Publication Date: 2017-05-25
• Subjects: supramolecular self‐assembly -- silver (Ag+) -- dual‐channel -- aqueous solution; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201600809
• Languages: English
• ISSNs: 1001-604X

Abstract

Abstract : 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 + . Abstract : In this paper, a fluorescent and colorimetric sensor based on the supramolecular self‐assembly was designed and synthesized, which could detect Ag + in aqueous solution with high sensitivity and selectivity. It had a remarkable ON–OFF type fluorescent signaling behavior and obvious color change from yellow to buff by adding Ag + into the solution ofZH .