期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 389, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2019.112184
关键词
Benzo[d]imidazo[2,1-b]thiazole; Zinc ions; Fluorescent probe; Chemosensor; CHEF
资金
- Mazandaran University of Medical Sciences [10387]
- Ministry of Health and Medical Education, Tehran, Iran
In this study, we have synthesized and evaluated three benzo[d]imidazo[2,1-b]thiazole-based sensors (BIT-1, BIT-2 and BIT-3). Among them, BIT-3 namely 2-(benzo[d]imidazo[2,1-b]thiazol-2-yl)-5-methoxyphenol was introduced as a selective fluorescence chemosensor for Zn2+ ion detection. The presence of zinc ions enhanced fluorescence property of BIT-3 at 404 nm due to formation of a 1:1 complex between the chemosensor and the Zn2+ ion. Control experiments showed that the analogous ions do not have fluorescence enhancement effect and some of them even quench the fluorescence dramatically. The data obtained from UV-vis absorption analysis, fluorescence measurements and H-1 NMR spectroscopy approved the interaction between BIT-3 and Zn2+ ion. The sensor probe BIT-3 exhibits a selective fluorescence enhancing property via a chelation-enhanced fluorescence (CHEF) upon addition of Zn2+. Thus, a selective fluorescent chemosensor BIT-3 establishes an important sensing platform for real-time monitoring of Zn2+ ion in aqueous environment.
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