RSC Advances

A rhodamine B-based “turn-on” fluorescent sensor for detecting Cu 2+ and sulfur anions in aqueous media

D Guo, Z Dong, C Luo, W Zan, S Yan, X Yao

Index: Guo, Dan; Dong, Zhengping; Luo, Chao; Zan, Wenyan; Yan, Shiqiang; Yao, Xiaojun RSC Advances, 2014 , vol. 4, # 11 p. 5718 - 5725

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Citation Number: 21

Abstract

A novel selective fluorescent chemosensor L based on rhodamine B derivative has been designed and synthesized to optically detect Cu2+ and S2− in aqueous buffer solution. The fluorescence of L was excited by Cu2+ with a 1: 1 binding ratio, and could be used as a “turn- on” type sensor. Otherwise, the emission band would undergo a slight red-shift. Once binding with Cu2+, the copper complex can exhibit high selectivity for S2−. Upon addition ...