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Abstract
The rational design of organic semiconductors based on crystalline covalent organic frameworks (COFs) as efficient photocatalysts is highly desirable. In this study, the first example of phenanthroimidazole-based COFs is reported: PImCOF1 with an imine linkage and PIm-COF2 with a β-ketoenamine-linkage. Both COF materials showed substantial optical properties. The average hydrogen evolution rate was 7417.5 μmolg-1h-1 for PIm-COF2, which was 20 times higher than that of PIm-COF1 (358.5 μmolg-1h-1). This can be attributed to the strong donor-acceptor
effect of PIm-COF2 and the continuous separation and transfer of the photoexcited electron-hole pair from the phenanthro[9,10-d]imidazole moiety.
Supplementary materials
Title
Supporting Information for Phenanthroimidazole-Based Covalent Organic Frameworks Enhancing Photocatalytic Hydrogen Evolution Reaction
Description
Experimental section, CO2 adsorption capacity, TGA curves, SEM images, elemental mappings, TEM images, and optimization of the photocatalytic conditions.
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