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Liu, Hongyan; Wang, Yi; Xue, Xiao; Liu, Yuhui; Chen, Peng; Wang, Peng; Yin, Shuang-Feng
Journal of colloid and interface science, September 2024, 2024-Sep, 2024-09-00, 20240901, Volume: 669Journal Article
Display omitted •The perylene diimide (PDI) connected with barbituric acid through was prepared by the self-assembly method.•The local weak hydrogen bond-induced dipole–dipole interactions.•The local weak hydrogen boosts the excitons dissociation and charge transfer.•The unique electronic structure facilitates the transfer of polarity to the reactive molecule. Functionalizing organic polymers is an effective strategy for enhancing their photocatalytic performance. However, this approach is currently limited by specific motifs, complex preparation methods, and an unclear electron transfer mechanism. Here, we present a meticulously designed structure of perylene diimide connected with poly (barbituric acid trimer) through self-assembled hydrogen bonding. In particular, the local chemical environment of the two components is adjusted by hydrogen bond-induced dipole–dipole interactions, leading to the emergence of a significant inherent electric field. Additionally, the formation of hydrogen bonds provides electronic pathways that facilitate charge transfer from perylene to adjacent units. Moreover, the distinctive electronic structure enhances polarity transfer and improves activation and adsorption capabilities for reactive molecules. Ultimately, B-PDI exhibits outstanding oxidation rates for benzylamine to N-benzylidene-benzylamine (10.03 mmol g-1h-1) and selectivity (>99.99 %). Our work offers a widely popular approach for enhancing the photocatalytic activity of organic semiconductor materials by constructing hydrogen bonds in heterogeneous molecules.
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