JOURNAL ARTICLE

Switching the recognition preference of rhodamine B spirolactam by replacing one atom: design of rhodamine B thiohydrazide for recognition of Hg(II) in aqueous solution

Hong Zheng, Zhen-Hua Qian, Lei Xu, Fang-Fang Yuan, Li-Dan Lan, Jin-Gou Xu
Organic Letters 2006 March 2, 8 (5): 859-61
16494459
A new chemosensor based on rhodamine B thiohydrazide is described. Chemosensor B was found to show a reversible dual chromo- and fluorogenic response toward Hg2+ in aqueous solution in a highly selective and sensitive manner. This was suggested to result from the coordination of Hg2+ at the N, S binding sites in B to open its spiro ring.

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