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Ma, Shuai; Ma, Jin-Ming; Cui, Jing-Wang; Rao, Cai-Hui; Jia, Meng-Ze; Zhang, Jie
Green chemistry : an international journal and green chemistry resource : GC, 03/2022, Volume: 24, Issue: 6Journal Article
A mild and efficient photocatalytic C-H bond activation strategy has been developed based on organic small molecules. A combination of the excellent redox-active activity of the pyridinium unit and Brønsted basic site of the N-heterocyclic unit offers a concerted pathway for H abstraction through concomitant proton and electron transfer, thus solving the key dehydrogenation process of C-H bond activation. The photocatalytic system shows high performance in selective oxidation of ethylbenzene, toluene and its homologue, and a gram-level conversion of p -xylene into terephthalic acid has been achieved at room temperature under an air atmosphere without any co-catalysts and additives. A mild and efficient photocatalytic C-H bond activation strategy has been developed by combining redox-active and Brønsted basic dual sites to offer a concerted pathway for H abstraction through concomitant proton and electron transfer.
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