Sensitive and Selective Fluorescent Chemosensors Combining Multiple PET Processes for Ag+ Sensing |
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Authors: | SU Jie HUANG Shanshan HE Song ZENG Xianshun |
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Institution: | Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China |
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Abstract: | In this work, a novel fluorescent chemosensor combining multiple photoinduced electron transfer(PET) processes for the detection of Ag+ ion was synthesized. The PET processes were derived from the lone electron pair of the selenium donors and the tertiary nitrogen atom of the coumarin fluorophore, which have not yet been used in the fluorescent chemosensor designed for Ag+ ion. Interestingly, the chemosensors showed fluorescent responses to Ag+ ion with a fluorescence enhancement factor of 3-5-fold by blocking the intramolecular PET quenching pathways. Furthermore, the probe exhibited high selectivity and sensitivity for Ag+ ion over other relevant species with detection limit down to 10 nmol/L level. The chemosensors also showed excellent performances in analyzing natural water samples. The chemosensors developed herein represent a new strategy for the PET fluorescent chemosensor design for the detection of Ag+ ion. |
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Keywords: | Chemosensor Photoinduced electron transfer Fluorescence Coumarin Silver ion |
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