期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 9, 期 12, 页码 4558-4562出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ob05164d
关键词
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资金
- NSFC [20802014, 20903032, 20971066, 21021062]
- innovation teams for organosilicon chemistry [20091250016]
Pyrene derivative 1 containing four trimethylsilylethynyl substituents was synthesized and investigated as a chromogenic and fluorescent chemodosimeter sensor for fluoride ions. 1 showed a high sensitivity and specific selectivity over a rapid response time toward fluoride anions compared to other anions, such as Cl-, Br-, ClO4-, H2PO4- and HPO42-. TD-DFT calculations showed that the delocalization of the sigma-electrons of the silicon destabilized the HOMO energy level of 1, thus red shifting both its absorption and emission spectrum. The addition of F- removed the trimethylsilyl substituents and resulted in a blue shift of both the absorption and fluorescent spectra of 1, which could be monitored by the color change with the naked-eye. Moreover, an easy to prepare test paper, which was obtained by immersing a filter paper into a THF solution of 1, could be utilized to detect and estimate the concentration of fluoride anions in water.
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