Phenanthroimidazole-Based Covalent Organic Frameworks with Enhanced Activity for the Photocatalytic Hydrogen Evolution Reaction
Source abstract
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: PIm-COF1 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 –1 h –1 for PIm-COF2, which was 14 times higher than that of PIm-COF1 (528.5 μmolg –1 h –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 which are verified by time-dependent density functional theory and excitation state analysis.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Covalent Organic Framework Applications · Advanced Photocatalysis Techniques · Metal-Organic Frameworks: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, P. R. China
KENTECH Institute for Environmental and Climate Technology, Korea Institute of Energy Technology (KENTECH), Naju, 58330, Korea
Funding
National Research Foundation of Korea · China Scholarship Council
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