A supramolecular photosensitizer based on triphenylamine and pyrazine with aggregation-induced emission properties for high-efficiency photooxidation reactions,Journal of Colloid and Interface Science

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A supramolecular photosensitizer based on triphenylamine and pyrazine with aggregation-induced emission properties for high-efficiency photooxidation reactions
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2024-03-30 , DOI: 10.1016/j.jcis.2024.03.197
Rui-Zhi Dong ₁ , Xiao-Han Shi ₁ , Hui Liu ₁ , Shengsheng Yu ₁ , Kai-Kai Niu ₁ , Ling-Bao Xing ₁

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Recently, there has been a great interest in the study of photocatalysts (PCs) and photosensitizers (PSs) in the field of organic photocatalysis. In the present study, a pure organic thermally activated delayed fluorescence (TADF) molecule 4,4′-(12-(pyridin-4-yl)dibenzo[f,h]pyrido[2,3-b]quinoxaline-3,6-diyl)bis(N,N-diphenylaniline) (DPQ-TPA) was designed and synthesized, which not only have excellent TADF property and small energy splitting (ΔEST), but also can self-assembly in water to form cross-linked nanoparticles with exceptional aggregation-induced emission (AIE) characteristics. DPQ-TPA exhibits excellent remarkable selectivity and notably enhances the production capacity of reactive oxygen species (ROS), particularly 1O2, which was employed as a highly effective photocatalyst in the photooxidation reaction of phosphine and hydroazobenzenes under blue light irradiation with high yields up to 94% and 91%, respectively. This work expands the potential application of (donor-acceptor) D-A type AIE-TADF molecules in photocatalytic organic transformations through supramolecular self-assembly.

中文翻译：

一种基于三苯胺和吡嗪的超分子光敏剂，具有聚集诱导发射特性，适用于高效光氧化反应

近年来，人们对有机光催化领域的光催化剂（PC）和光敏剂（PS）的研究产生了浓厚的兴趣。在本研究中，设计合成了一种纯有机热激活延迟荧光（TADF）分子 4,4′-（12-（吡啶-4-基）二苯并[f，h]吡啶并[2,3-b]喹喃啉-3,6-二基）双（N，N-二苯胺）（DPQ-TPA），其不仅具有优异的 TADF 性能和小能量分裂（ΔEST），而且可以在水中自组装形成具有特殊聚集诱导发射（AIE）特性的交联纳米颗粒。DPQ-TPA 表现出优异的显着选择性，并显着提高了活性氧（ROS）的生产能力，尤其是 1O2，它在蓝光照射下用作膦和氢偶氮苯光氧化反应的高效光催化剂，产率分别高达 94% 和 91%。这项工作通过超分子自组装扩展了（供体-受体）D-A 型 AIE-TADF 分子在光催化有机转化中的潜在应用。

更新日期：2024-03-30

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