Visible-light-driven graphene supported Cu/Pd alloy nanoparticle-catalyzed borylation of alkyl bromides and chlorides in air
作者:Zhi-Feng Jiao、Ya-Ming Tian、Xiao-Ning Guo、Udo Radius、Holger Braunschweig、Todd B. Marder、Xiang-Yun Guo
DOI:10.1016/j.jcat.2021.01.019
日期:2021.3
A highly efficient photocatalytic protocol for borylation of alkyl bromides and chlorides with graphene supported Cu/Pd alloy nanoparticles as a heterogeneous catalyst is reported. This photocatalytic system operates with visible light in air, providing a wide range of primary and secondary alkyl halides with B2pin2 or B2neop2 in high yields at low temperatures, thereby demonstrating its broad utility
报道了一种高效的光催化方案,用于将烷基溴和氯化物与石墨烯负载的Cu / Pd合金纳米粒子作为非均相催化剂进行硼化。该光催化系统利用空气中的可见光进行操作,提供了各种具有B 2 pin 2或B 2 neop 2的伯烷基卤和仲烷基卤。在低温下高收率,因此证明了其广泛的用途和官能团耐受性。高性能归因于Cu的局部表面等离振子共振(LSPR)和由于合金表面电荷异质性导致的电荷从Cu到Pd的协同效应。高能电子从Pd转移到亲电的烷基卤化物导致烷基的形成,其迅速与二硼化合物的亲核加合物发生反应,其碱吸附在带正电的Cu位上,形成相应的硼酸酯化产物。