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ESIPT triggered TICT of an Al3+ fluorescence sensor and its sensing mechanism
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.jlumin.2020.117203
Bingqing Sun , Lei Liu , Wei Liu , Fande Meng , Qiuxiang Huang

Abstract Excited state intramolecular proton transfer (ESIPT) and twisted intramolecular charge transfer (TICT) play fundamental roles during the excited state dynamics of dyes and fluorescent sensors. In this contribution, the ESIPT process is demonstrated to trigger the TICT process during the photo-physical process of a turn-on Al3+ sensor. The non-emissive TICT state can be facilely reached after the photo excitation and the ESIPT process, which quenches the fluorescence of the sensor. Al3+ is demonstrated to coordinate with the sensor and lock the twisted of the sensor, which eliminates the TICT state and turns on the fluorescence. Selective of the sensor is also revealed by study the interaction and electron transfer between the sensor and Cr3+.

中文翻译:

一种Al3+荧光传感器的ESIPT触发TICT及其传感机制

摘要 激发态分子内质子转移 (ESIPT) 和扭曲分子内电荷转移 (TICT) 在染料和荧光传感器的激发态动力学过程中起重要作用。在这个贡献中,ESIPT 过程被证明在开启 Al3+ 传感器的光物理过程中触发 TICT 过程。在光激发和 ESIPT 过程后,可以很容易地达到非发射 TICT 状态,这会淬灭传感器的荧光。Al3+ 被证明与传感器协调并锁定传感器的扭曲,从而消除 TICT 状态并打开荧光。通过研究传感器与 Cr3+ 之间的相互作用和电子转移,还揭示了传感器的选择性。
更新日期:2020-07-01
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