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Highly Selective and Sensitive Fluorescent Turn-on Chemosensor for Al3+ Based on a Novel Photoinduced Electron Transfer Approach
來源:曾憲順研究員個(gè)人網(wǎng)站 發(fā)布日期:2011-09-25
具體來源:Org. Lett. 2011, 13, 5274-5277
發(fā)表時(shí)間:2011年

A photoinduced electron transfer (PET)-based chemosensor possessing dual PET processes by simultaneously introducing both nitrogen and sulfur donors was achieved. The fluorescence signal of the free chemosensor is in normal-off state due to the sulfur donor being insensitive to environmental pH stimuli. As a result, the device can be used over a wide pH span of 3-11. Upon binding Al3+, a significant fluorescence enhancement with a turn on ratio over 110 fold was triggered by the inhibition of PET processes from both the sulfur and the nitrogen donors to the fluorophore.

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