Highly Selective and Sensitive Fluorescent Turn-on Chemosensor for Al3+ Based on a Novel Photoinduced Electron Transfer Approach

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• 作者：Yan Lu ; Shanshan Huang ; Yiyang Liu ; Song He ; Liancheng Zhao ; Xianshun Zeng
• 刊名：Organic Letters
• 出版年：2011
• 出版时间：October 7, 2011
• 年：2011
• 卷：13
• 期：19
• 页码：5274-5277
• 全文大小：738K
• 年卷期：v.13,no.19(October 7, 2011)
• ISSN：1523-7052

文摘

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 a 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鈥?1. 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.