Highly photoelectrical responsive and controllable supramolecular helical assemblies with dual functionalities as photo-organocatalysts

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-04-18 DOI:10.1016/j.colsurfa.2025.136968

Yiheng Ren , Duo Wei , Wei Yang , Tian Tian , Yanyan Zhang , Jie Han , Rong Guo

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引用次数: 0

Abstract

Despite the enhanced photocatalytic efficiency of H-type assemblies with long-range ordered cofacial π-stacking (stemming from improved carrier mobility and stability), current studies predominantly concentrate on monomeric organic photocatalysts in organic media. We develop hierarchically ordered dipeptide-perylene diimide assemblies that synergistically integrate photocatalytic and organic catalytic functions, mimicking nature photosynthesis system. Through systematic modulation of solvent composition, pH, and fabrication protocols, precisely tunable nanoarchitectures spanning nanofibers, twisted nanorods, "donut" assemblies, and spherical nanostructures were constructed from lamellar building units in aqueous media. Architecture-dependent photoelectrical responsivity achieved a maximum of 2.0 μA cm⁻², representing a 5.8-fold enhancement. Highly ordered assemblies exhibited exceptional triethylamine sensing performance (97.8 μA cm⁻², 65-fold amplification) with a 4.7-fold lower detection limit than disordered aggregates. Remarkably, this system established dual-functional photo-organocatalytic activity, attaining 91.7 % conversion efficiency in tandem photooxidation/alkylation of 2-arylindoles.

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具有光有机催化剂双重功能的高光电响应和可控超分子螺旋组件

尽管具有长程有序共面π堆积的h型组件的光催化效率提高（源于载流子迁移率和稳定性的提高），但目前的研究主要集中在有机介质中的单体有机光催化剂上。我们开发了层次有序的二肽-苝二亚胺组件，协同整合光催化和有机催化功能，模拟自然光合作用系统。通过系统地调节溶剂组成、pH值和制造工艺，我们在水介质中利用层状构建单元构建出了精确可调的纳米结构，包括纳米纤维、扭曲纳米棒、“甜甜圈”组件和球形纳米结构。与结构相关的光电响应率最高达到2.0 μA cm−2，提高了5.8倍。高度有序的聚集体表现出优异的三乙胺传感性能（97.8 μA cm−2，放大65倍），检测限比无序聚集体低4.7倍。值得注意的是，该体系建立了双功能的光有机催化活性，在串联光氧化/烷基化反应中，2-芳烯多酚的转化效率达到91.7 %。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.