Single-fluorophore-based fluorescent probes enable dual-channel detection of Ag and Hg with high selectivity and sensitivity |
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| Authors: | Yanlin Lv Lili Zhu Heng Liu Yishi Wu Zili Chen Hongbing Fu Zhiyuan Tian |
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| Institution: | 1. School of Chemistry & Chemical Engineering, University of Chinese Academy of Sciences (UCAS), Beijing 100049, China;2. Department of Chemistry, Renmin University of China, Beijing 100872, China;3. Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Key Laboratory for Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | A new type of fluorescent probe capable of detecting Ag+ and Hg2+ in two independent channels was developed in the present work. Specifically, in CH3CN–MOPS mixed solvents with CH3CN/MOPS ratio (v/v) of 15/85, this type of probe fluoresced weakly, and the addition of Ag+ remarkably induced fluorescence enhancement of the probe. In CH3CN–MOPS mixed solvents with the percentage of CH3CN increased up to 65%, the probe was highly fluorescent and addition of Hg2+ dramatically induced the fluorescence quenching. Thus, using such single-fluorophore-based probe and tuning the polarity of the mixed solvent, Ag+, and Hg2+ can be detected in independent channels with high selectivity and sensitivity. As a result, the mutual interference usually encountered in most cases of Ag+ and Hg2+ sensing owing to the similar fluorescence response that these two ions induced, can be effectively circumvented by using the probes developed herein. |
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| Keywords: | Fluorescent probe Silver ions Mercury ions Dual-channel detection |
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