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通过电子捐赠者替代高性能化物离子来操纵激发状态的分子内质子转移,以检测高性能化物离子
Hui Dai1, Huiwen Zeng1, Hualiu Li2
1School of Chemistry, South China Normal University, Guangzhou 510006, China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|November 6, 2023
概括
研究人员合成了新的 donor-π-acceptor 分子,以研究激发状态分子内质子转移 (ESIPT) 特性. 一个分子,M-TPA,作为检测化物离子的高度敏感光探针,表现出了卓越的性能.
科学领域:
- 有机化学 有机化学
- 光物理学的光学物理学
- 材料科学 材料科学 材料科学
背景情况:
- 激发状态内分子质子转移 (ESIPT) 分子是多功能功能材料.
- 了解电子捐赠体置换和发光之间的联系对于设计新的ESIPT发光剂至关重要.
研究的目的:
- 为了合成和表征具有捐赠者-π-接受者 (D-π-A) 结构的2-(2-基) 佐醇衍生物.
- 调查电子供体替代物及其位置对ESIPT发光器的光物理和传感性能的影响.
主要方法:
- 合成四种2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 西乙烯的衍生物.
- 在各种溶剂中进行光谱分析 (光,吸收).
- 对聚合诱导的排放 (AIE) 和ESIPT现象的评估.
- 作为光探针用于离子检测的应用.
主要成果:
- 光特性根据电子供体部分 (三胺,四烯),替代物位置和溶剂极性而有显著的变化.
- M-TPA和M-En表现出聚合诱导发射 (AIE) 和ESIPT,导致高固态量子产量和大斯托克斯移位.
- M-TPA作为一种高度敏感和选择性的化离子开启光探针,具有较低的检测极限 (11 nM).
结论:
- 电子供体替代和分子结构极大地影响ESIPT和发光行为.
- AIE和ESIPT的协同效应增强了固态排放特性.
- ESIPT操纵为开发高性能光传感器提供了一个强大的策略,以化物检测的M-TPA探针为例.
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