A selective fluorogenic chemodosimeter for Hg²⁺ based on the dimerization of desulfurized product

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• 作者：Peng Zhang ; BingBing Shi ; YouMing Zhang ; Qi Lin ; Hong Yao ; XingMei You ; TaiBao Wei
• 关键词：Mercury ions ; Desulfurization ; Dimerization ; Fluorescence turn on ; Thiosemicarbazone ; Acetate anion
• 刊名：Tetrahedron
• 出版年：2 December, 2013
• 年：2013
• 卷：69
• 期：48
• 页码：10292-10298
• 全文大小：1766 K

文摘

A simple Hg²⁺-selective chemodosimetric system based on thiosemicarbazone was investigated. The transformation of thiosemicarbazone into semicarbazone selectively exerted by Hg²⁺ ions and the dimerization of semicarbazone resulted in a pronounced OFF-ON-type fluorescent signaling behavior. The coexistent metal ions, such as Fe³⁺, Ca²⁺, Cu²⁺, Co²⁺, Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cr³⁺, Mg²⁺, Na⁺, K⁺, and Fe²⁺, had no obvious interference with the detection of Hg²⁺. In addition, S₁₂-Hg²⁺ plays a high sensitivity for basic anions to form an 鈥極FF-ON-OFF鈥?type signaling behavior, with the Hg²⁺-induced emission spectra can be quenched. Moreover, test strips based on S₁₂ exhibited a good selectivity to Hg²⁺. We believe the test strips could act as a convenient and efficient Hg²⁺ test kit.