Rhodamine B Hydrazide Revisited: Chemodosimetric Hg2+-selectiveSignaling Behavior in Aqueous Environments

Bulletin of the Korean chemical society

Myung Gil Choi¹  Suk-Kyu Chang¹  Jae Hyun Noh¹  Kyoung Nam Kim¹  Sangdoo Ahn¹ 

关键词: Chemodosimeter;    Hg2+-selectivity;    Rhodamine;    Fluorescence;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The well-known Cu2⁺-selective chemodosimetric behavior of rhodamine B hydrazide was successfully switched to selectivity for Hg²⁺. The fluorescence signaling is remarkably selective toward Hg²⁺ ions compared to other common biologically and environmentally important metal ions, including Cu²⁺ ions. The detection limit was 0.2 レM in an acetate-buffered aqueous 10% methanol solution at pH 5. The OFF-ON type of signaling is due to the selective Hg²⁺-induced hydrolysis of the lactam ring of the hydrazide as has been reported for the standard Cu²⁺-signaling process of the same compound. A simple change in medium resulted in clear switching of selective signaling from Cu²⁺ to Hg²⁺, which extends the applicability of the easily accessible hydrazide derivative.

【 授权许可】

Unknown