A Novel 5-Mercapto Triazole Schiff Base as a Selective Chromogenic Chemosensor for Cu2+
A novel colorimetric cation sensor bearing phenol, thiol and HC=N groups was designed and synthesized. In a DMSO/H2O (9:1, v/v) solution, the sensor exhibited highly selective recognition of Cu2+ among a range of metal ions tested. In the presence of Cu2+, solutions of the sensor underwent a dramatic color change from colorless to yellow, while the presence of other metal cations such as Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Fe3+, Hg2+, Ag+ and Ca2+ had no effect on the color. The detection limit of the sensor toward Cu2+ is 8.0×10‐7M and an association constant Ka of 4.3×105M‐1 was measured. The sensing of Cu2+ by this sensor was found to be reversible, with the Cu2+-induced color being lost upon addition of EDTA.
copper ion colorimetric sensor schiff base cation recognition
Ming Xia Liu Tai-Bao Wei Qi Lin You-Ming Zhang
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou,Gansu, 730070, P. R. China
国内会议
兰州
英文
53-55
2011-08-01（万方平台首次上网日期，不代表论文的发表时间）