作者:Weimin Liu、Liwei Xu、Hongyan Zhang、Juanjuan You、Xiaoling Zhang、Ruilong Sheng、Huaping Li、Shikang Wu、Pengfei Wang
DOI:10.1039/b815956d
日期:——
Thiorhodamine-based chemodosimeter A, a disulfide linked dimer, was designed for Hg2+ recognition by virtue of the strong affinity of mercury for sulfur. Spectroscopic results reveal that chemodosimeter A exhibits real-time responses, and high sensitivity and selectivity for Hg2+ in comparison to other cations. These properties are mechanistically ascribed to the transfer from rhodamine spirolactam to the thiazoline-derived open-ring rhodamineviaHg2+ induced desulfurization. The in vitro recognition of Hg2+ in living cells pretreated with A was examined, showing that the concentration of Hg2+ that could be imaged reaches the safety limit for human beings.
基于硫代罗丹明的化学传感器A,作为一种二硫键连接的二聚体,因其对硫的高亲和力而被设计用于Hg²⁺的识别。光谱学结果显示,与其他阳离子相比,化学传感器A对Hg²⁺具有实时响应、高灵敏度和选择性。这些性质在机制上归因于通过Hg²⁺诱导的去硫化作用,从罗丹明螺内酯转化为噻唑啉衍生的开环罗丹明。通过预处理了A的活细胞中Hg²⁺的体外识别实验表明,可成像的Hg²⁺浓度达到了人类的安全界限。