AbstractPhotoinduced metal–organic framework (MOF) enabled heterogeneous thiol catalysis has been achieved for the first time. MOF Zr‐TPDCS‐1, consisting of Zr6‐clusters and TPDCS linkers (TPDCS=3,3′′,5,5′′‐tetramercapto[1,1′:4′,1′′‐terphenyl]‐4,4′′‐dicarboxylate), effectively catalyzed the borylation, silylation, phosphorylation, and thiolation of organic molecules. Upon irradiation, the fast electron transfer from TPDCS to Zr6‐cluster is believed to facilitate the formation of the thiyl radical, a hydrogen atom transfer catalyst, which competently abstracts the hydrogen from borane, silane, phosphine, or thiol for generating the corresponding element radical to engender the chemical transformations. The elaborate control experiments evidenced the generation of thiyl radicals in MOF and illustrated a radical reaction pathway. The gram‐scale reaction worked well, and the product was conveniently separated via centrifugation and vacuum with a turnover number (TON) of ≈3880, highlighting the practical application potential of heterogeneous thiyl‐radical catalysis.
摘要 首次实现了光诱导金属有机框架(MOF)异相硫醇催化。由 Zr6 簇和 TPDCS 连接器(TPDCS=3,3′′,5,5′′-四巯基[1,1′:4′,1′′-三联苯]-4,4′′-二甲酸酯),可有效催化有机分子的硼酸化、硅化、磷酸化和硫代化。在辐照下,TPDCS 与 Zr6 簇之间的快速电子转移被认为促进了硫基的形成,硫基是一种氢原子转移催化剂,能从硼烷、硅烷、膦或硫醇中抽取氢,生成相应的元素自由基,从而引发化学转化。精心设计的对照实验证明了硫基自由基在 MOF 中的生成,并说明了自由基反应途径。克级反应效果良好,产物经离心和真空分离后,周转次数(TON)≈3880,凸显了异相硫基自由基催化的实际应用潜力。