Light-Induced Efficient Hydroxylation of Benzene to Phenol by Quinolinium and Polyoxovanadate-Based Supramolecular Catalysts
Light-Induced Efficient Hydroxylation of Benzene to Phenol by Quinolinium and Polyoxovanadate-Based Supramolecular Catalysts
复制标题
DOI：
10.1002/anie.202011164
复制
发表时间：
2020-10-15
影响因子：
16.6
通讯作者：
Wei, Yongge
中科院分区：
文献类型：
--
作者：
Gu, Yaqi;Li, Qi;Wei, Yongge
高收率、高选择性的苯直接羟基化制苯酚一直是苯酚工业生产的目标。光催化由于其成本低、环境友好等优点成为苯羟基化合成苯酚的一种有竞争力的方法，但如何同时获得高收率、高选择性和高原子利用率仍然是一个严峻的挑战。在这里，我们展示了一系列的超分子催化剂的基础上烷氧六钒酸根阴离子和喹啉离子的光催化羟基化苯苯酚在紫外光照射下。我们证明了多烷氧钒酸盐可以作为有效的催化剂，不仅可以稳定喹啉自由基，而且可以重复使用喹啉离子在光照射下产生的H（2）O（2），以获得优异的协同效应，包括有竞争力的良好产率（50.1%），高选择性（> 99%）和高原子利用率。
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.