Wang Xue-Zhi, Cai Bing-Chen, Zhou Yi-Jie, Zhou Chuang-Wei, Wu Ming-Min, Zhou Xian-Chao, Wang Fu-Li, Zhou Xiao-Ping, Li Dan
College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry, Jinan University, Guangzhou 510632, China.
Department of Radiology, The First Affiliated Hospital, Jinan University, Guangzhou 510632, China.
Dalton Trans. 2024 Sep 18;53(36):15297-15304. doi: 10.1039/d4dt01701c.
Oxidation of styrene is a key reaction in the synthesis of pharmaceuticals and fine chemicals, and therefore oxidizing styrene with selective, efficient, and recyclable heterogeneous catalysts is significant from an environmental and economic standpoint. In this study, we report the transition Cr-based metal-organic framework [NH-MIL-101(Cr)] as a heterogeneous photocatalyst, which efficiently promotes styrene epoxidation using HO as a green oxidant, achieving high conversion efficiency (98%) and excellent selectivity (82%) under ambient conditions. Radical detection and quenching experiments reveal that the superoxide radical anion (O˙) acts as an active oxygen species, selectively promoting the oxidation of styrene to its oxidized form. This work provides insight into the development of a sustainable and cost-effective method for producing styrene oxide.
苯乙烯的氧化是药物和精细化学品合成中的关键反应，因此，从环境和经济角度来看，使用选择性、高效且可回收的多相催化剂氧化苯乙烯具有重要意义。在本研究中，我们报道了过渡金属铬基金属有机框架[NH-MIL-101(Cr)]作为一种多相光催化剂，它使用H₂O₂作为绿色氧化剂有效地促进苯乙烯环氧化反应，在环境条件下实现了高转化效率（98%）和优异的选择性（82%）。自由基检测和猝灭实验表明，超氧自由基阴离子（O₂˙‾）作为活性氧物种，选择性地促进苯乙烯氧化为其氧化产物。这项工作为开发一种可持续且具有成本效益的环氧苯乙烷生产方法提供了思路。
