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Rhodamine thiospirolactone. Highly selective and sensitive reversible sensing of Hg(ii)†

Xin-Qi Zhan,ab Zhen-Hua Qian,a Hong Zheng,*a Bing-Yuan Su,a Zhi Lanb and Jin-Gou Xu*a Author affiliations

* Corresponding authors

a Key Laboratory of Analytical Sciences, Ministry of Education, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China E-mail: [email protected], [email protected] Fax: +86-592-2186401 Tel: +86-592-2180307

b Medical College of Xiamen University, Xiamen 361005, China

Abstract

A novel rhodamine thiospirolactone chemosensor 1 was found to develop prominent absorbance and fluorescence enhancements in the presence of Hg2+ in aqueous solution and this was suggested to result from the thiospiro ring opening induced by Hg2+ binding.

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