Highly selective visual detection of Cu (II) utilizing intramolecular hydrogen bond-stabilized merocyanine in aqueous buffer solution
ZQ Guo, WQ Chen, XM Duan
Index: Guo, Zhao-Qi; Chen, Wei-Qiang; Duan, Xuan-Ming Organic Letters, 2010 , vol. 12, # 10 p. 2202 - 2205
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Citation Number: 72
Abstract
A Cu2+-specific colorimetric sensor 1, which is stabilized by an intramolecular hydrogen bonding, was designed and developed. The color of 1 changes from purple to blue on addition of 1.0 μM Cu2+ in aqueous buffer solution, which can be detected by the naked eye. The analytical detection limit for Cu2+ by the naked eye is as low as 1.0 μM. The stoichiometry for 1 and Cu2+ in complex is 2: 1 in aqueous solution.
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