Highly Sensitive and Selective Chemosensor for Cu2＋ Based on a Schiff Base  

作　　者：CAO Ben-nan HU Qin HUANG Yan JIA Chun-man ZHANG Qi 

机构地区：[1]Key Study Center of Ministry of Education for Tropical Resources Utilization, Hainan Provincial Key Lab of Fine Chemicals, Hainan University, Haikou 570228, P. R. China [2]Department of Chemistry and Chemical Engineering, Jiangsu University, Jiangsu 212013, P. R. China

出　　处：《Chemical Research in Chinese Universities》2013年第3期419-423,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.21166008, 21261008）, the Natural Science Foundation of Hainan Province, China（No.209001）, the Youth Fund of Hainan University, China（No.qnjj 1169） and the Technology Support Program of the Jiangsu Province, China（No.SBE 201077304）.

摘　　要：A new chemosensor based on a Schiff base has been designed and synthesized. Its sensing behavior toward various metal ions was investigated by fluorescence and UV-Vis spectroscopic methods. The fluorescence of the sensor was quenched and the color rapidly changed from canary yellow to brown after the addition of Cu2＋, while no changes occurred after the addition of other metal ions, which contributes to the detection of Cu2＋ with naked eyes. The fluorescence quantum yield of the ligand was calculated to be 0.52. The corresponding detection limit of Cu2＋ was 5.721 × 10-7 mol/L, and the 1：1 binding mode of the sensor with Cu2＋ was revealed by Job＇s plot.A new chemosensor based on a Schiff base has been designed and synthesized. Its sensing behavior toward various metal ions was investigated by fluorescence and UV-Vis spectroscopic methods. The fluorescence of the sensor was quenched and the color rapidly changed from canary yellow to brown after the addition of Cu2＋, while no changes occurred after the addition of other metal ions, which contributes to the detection of Cu2＋ with naked eyes. The fluorescence quantum yield of the ligand was calculated to be 0.52. The corresponding detection limit of Cu2＋ was 5.721 × 10-7 mol/L, and the 1：1 binding mode of the sensor with Cu2＋ was revealed by Job＇s plot.

关 键 词：Chemosensor Schiffbase Copper ion Naked-eye detection QUENCH 

分 类 号：O625.632[理学—有机化学] O657.1[理学—化学]