Hg²⁺-induced self-assembly of a naphthalimide derivative by selective ¡°turn-on¡± monomer/excimer emissions

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• 作者：Nantanit Wanichacheva^a ; ^{wanichacheva.nantanit@gmail.com} ; ^{nantanit@su.ac.th} ; Narupon Prapawattanapol^b ; Vannajan Sanghiran Lee^c ; Kate Grudpan^d ; Amorn Petsom^e
• 关键词：Naphthalimide probe ; Mercury sensor ; Hg2+-selectivity ; Excimer
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：134
• 期：Complete
• 页码：686-690
• 全文大小：564 K

文摘

A novel fluorescent sensor bearing two naphthalimide fluorophores based on 2-(3-(2-aminoethylsulfanyl)propylsulfanyl)ethanamine, 1, was readily synthesized for the recognition of Hg²⁺. The sensitive and selective binding behaviors of 1 were investigated by fluorescence spectroscopy. Sensor 1 selectively binds Hg²⁺ by exhibiting OFF-ON fluorescence enhancement behaviors of the monomer and excimer bands. The sensor provides excellent Hg²⁺-selectivity in the presence of high concentrations of competitive ions, particularly Cu²⁺ and Pb²⁺ as well as Na⁺, K⁺, Mn²⁺, Cd²⁺, Ni²⁺, Ca²⁺, Li⁺, Zn²⁺ and Co²⁺, with an available detection limit of 2.1¡Á10^?7 M or 42 ppb.