期刊
CELL REPORTS PHYSICAL SCIENCE
卷 2, 期 7, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.xcrp.2021.100491
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资金
- Agency for Science, Technology and Research (A*STAR) under its AME IRG Grant [A20E5c0096]
- Ministry of Education of Singapore (MOE of Singapore) [MOE2017-T2-2-081]
- National University of Singapore [R-143-000-B60-114]
- National University of Singapore Flagship Green Energy Program [R-279-000-553-646, R-279-000-553-731]
- NUS Suzhou Research Institute
- National Natural Science Foundation of China [31971614, 21871205, 22071170]
PCNs are promising heterogeneous photocatalysts for organic transformations due to their metal-free nature, tunable bandgaps, and excellent stability. The synthesized PCN nanosheets with heteroatom doping and vacancies exhibit impressive photoredox catalytic performances, surpassing commonly utilized PCNs in efficiency.
Polymeric carbon nitrides (PCNs) have emerged as promising heterogeneous photocatalysts for organic transformations as they are metal-free, inexpensive, and possess tunable bandgaps, with excellent chemical stability and photo-stability. However, current application of PCNs in organic synthesis is rather limited to several well-established materials, which limits the scope of reaction patterns and efficiency. We herein report the synthesis and fabrication of two PCN nanosheets by incorporating nanostructure construction, element doping, and vacancy engineering into one hybrid platform. The heteroatom doped PCN nanosheets with vacancies feature highly porous structures with extremely large substrate-catalyst interface areas and enhanced charge separation. The generated heterogeneous catalysts demonstrate impressive photoredox catalytic performances in a variety of organictransformations (e.g., defluoroborylation; [2+2] cycloaddition; C-N, C-S, C-O cross-couplings; and an unprecedented regioselective hydrosilylation), providing efficiencies comparable to reported optimized homogeneous catalysts and exceeding those with commonly utilized PCNs.
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