School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China.
Org Lett. 2011 Oct 7;13(19):5274-7. doi: 10.1021/ol202054v. Epub 2011 Sep 14.
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 3-11. Upon binding Al(3+), 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.
一种基于光诱导电子转移（PET）的化学传感器，通过同时引入氮和硫供体来实现双重 PET 过程。由于硫供体对环境 pH 刺激不敏感，因此自由化学传感器的荧光信号处于正常关闭状态。因此，该器件可在 3-11 的宽 pH 范围内使用。与 Al（3+）结合后，通过抑制来自硫和氮供体到荧光团的 PET 过程，引发了超过 110 倍的开比值的显著荧光增强。
