Construction of donor-acceptor supramolecular organic framework with enhanced superoxide anion radical generation for photocatalytic synthesis of benzimidazole

IF 9.5 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2026-05-01 Epub Date: 2025-06-07 DOI:10.1016/j.cclet.2025.111426

Xianya Yao , Ning Han , Hui Liu , Lingbao Xing

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Abstract

The fabrication of three-component supramolecular organic frameworks (SOFs) is a considerable difficulty owing to the intricate noncovalent interactions and the constraints of current synthesis techniques. In this study, we designed and synthesized two photosensitive modules: a naphthalene-modified triphenylamine derivative (NA-TPA) as the donor unit, and a trimethylated viologen-modified triphenylamine (MV-TPA) as the acceptor unit. These modules can self-assemble into a novel two-dimensional SOF via encapsulation-enhanced donor-acceptor interactions with cucurbit[8]uril (CB[8]) in the aqueous solution. The resulting donor-acceptor SOF forms stable two-dimensional nanosheet structures in water. Compared to the individual monomers NA-TPA and MV-TPA, the SOF enhances electron transfer and significantly improves the generation of superoxide anion radicals (O₂^•−), which in turn effectively promotes the photocatalytic cyclization reaction between o-phenylenediamine and benzaldehyde in water, achieving a yield of up to 94 %. This work offers valuable insights into the design and construction of three-component SOFs based on encapsulation-enhanced donor-acceptor interactions for photocatalytic applications.

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光催化合成苯并咪唑用增强超氧阴离子自由基生成的供受体超分子有机框架的构建

由于复杂的非共价相互作用和现有合成技术的限制，制备三组分超分子有机框架（SOFs）是一个相当困难的问题。在本研究中，我们设计并合成了两个光敏模块：萘修饰的三苯胺衍生物（NA-TPA）作为供体单元，三甲基化的紫原修饰的三苯胺（MV-TPA）作为受体单元。这些模块可以通过封装增强的供体-受体相互作用与水溶液中的葫芦b[8] （CB[8]）自组装成一个新的二维SOF。所得的供体-受体软膜在水中形成稳定的二维纳米片结构。与单个单体NA-TPA和MV-TPA相比，SOF增强了电子转移，显著提高了超氧阴离子自由基（O2•−）的生成，从而有效地促进了邻苯二胺与苯甲醛在水中的光催化环化反应，收率高达94 %。这项工作为光催化应用中基于封装增强供体-受体相互作用的三组分SOFs的设计和构建提供了有价值的见解。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.