Changing Benzoxazole Ring into Nonring Imine Linkages on Covalent Organic Frameworks with Tuning H2O2 Photosynthesis Performance

Two π-conjugated covalent organic frameworks (COFs) with nonring imine or benzoxazole ring linkages were prepared by reacting 3,3′-dihydrooxybenzidine (BDOH) with 3,5-triformylbenzene (Tb) in the presence or absence of benzimidazole (BDOH-Tb-IM and BDOH-Tb-BO). Although two COFs indicated similar co...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2024-07, Vol.16 (30), p.40180-40189
Main Authors: Peng, Xueqing, Tian, Yue, Yang, Tao, Wang, Xi, Song, Chunmei, Kong, Aiguo
Format: Article
Language:English
Subjects:
benzimidazole
imines
photocatalysis
photosynthesis
Surfaces, Interfaces, and Applications
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Summary:Two π-conjugated covalent organic frameworks (COFs) with nonring imine or benzoxazole ring linkages were prepared by reacting 3,3′-dihydrooxybenzidine (BDOH) with 3,5-triformylbenzene (Tb) in the presence or absence of benzimidazole (BDOH-Tb-IM and BDOH-Tb-BO). Although two COFs indicated similar composition, crystalline structures, and morphologies, imine-based BDOH-Tb-IM exhibited a photocatalytic H2O2 production rate of 2490 μmol·g–1·h–1 in sacrificial reagent-free pure water, higher than that of benzoxazole-based BDOH-Tb-BO-a (1168 μmol·g–1·h–1). The higher photocatalytic activity of BDOH-Tb-IM was attributed to its more efficient photoinduced charge separation and utilization efficiency and different 2e– ORR active sites over the two COFs. This study demonstrated an available ring effect to adjust photocatalytic performance between π-conjugated COFs.
ISSN:1944-8244
1944-8252
1944-8252
DOI:10.1021/acsami.4c06179