【摘 要】
：
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 h
【机 构】
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CollegeofChemistryandChemicalEngineering,NorthwestNormalUniversity,Lanzhou,Gansu,730070,P.R.China
【出 处】
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2011年中西部地区无机化学化工学术研讨会
论文部分内容阅读
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.
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