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Light‐Induced Efficient Hydroxylation of Benzene to Phenol by Quinolinium and Polyoxovanadate‐Based Supramolecular Catalysts
Author(s) -
Gu Yaqi,
Li Qi,
Zang Dejin,
Huang Yichao,
Yu Han,
Wei Yongge
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202011164
Subject(s) - hydroxylation , phenol , benzene , chemistry , selectivity , catalysis , supramolecular chemistry , yield (engineering) , photocatalysis , photochemistry , radical , combinatorial chemistry , molecule , organic chemistry , materials science , metallurgy , enzyme
Abstract Direct Hydroxylation of benzene to phenol with high yield and selectivity has been the goal of phenol industrial production. Photocatalysis can serve as a competitive method to realize the hydroxylation of benzene to phenol owing to its cost‐effective and environmental friendliness, however it is still a forbidding challenge to obtain good yield, high selectivity and high atom availability meanwhile. Here we show a series of supramolecular catalysts based on alkoxohexavanadate anions and quinolinium ions for the photocatalytic hydroxylation of benzene to phenol under UV irradiation. We demonstrate that polyoxoalkoxovanadates can serve as efficient catalysts which can not only stabilize quinolinium radicals but also reuse H 2 O 2 produced by quinolinium ions under light irradiation to obtain excellent synergistic effect, including competitive good yield (50.1 %), high selectivity (>99 %) and high atom availability.