Visible-light-driven graphene supported Cu/Pd alloy nanoparticle-catalyzed borylation of alkyl bromides and chlorides in air

IF 6.5 1区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Catalysis Pub Date : 2021-03-01 DOI:10.1016/j.jcat.2021.01.019

Zhi-Feng Jiao , Ya-Ming Tian , Xiao-Ning Guo , Udo Radius , Holger Braunschweig , Todd B. Marder , Xiang-Yun Guo

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引用次数: 9

Abstract

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 and functional group tolerance. The high performance is attributed to a synergistic effect of localized surface plasmon resonance (LSPR) of Cu and charge transfer from Cu to Pd due to the alloy surface charge heterogeneity. Transfer of energetic electrons from Pd to electrophilic alkyl halides lead to the formation of the alkyl radicals, which quickly react with a nucleophilic adduct of a diboron compound with base adsorbed on the positively charged Cu sites to form the corresponding borylation product.

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可见光驱动石墨烯负载的铜/钯合金纳米颗粒催化烷基溴化物和氯化物在空气中的硼化反应

报道了一种以石墨烯负载的铜/钯合金纳米颗粒作为非均相催化剂的高效光催化方案，用于烷基溴化物和氯化物的硼化反应。该光催化系统在空气中的可见光下工作，在低温下以高收率提供B2pin2或B2neop2的各种伯和仲烷基卤化物，从而证明了其广泛的实用性和官能团耐受性。Cu的局部表面等离子体共振(LSPR)和Cu向Pd的电荷转移是合金表面电荷非均匀性的协同效应。从Pd到亲电的烷基卤化物的高能电子转移导致烷基自由基的形成，烷基自由基与吸附在带正电的Cu位点上的碱的二硼化合物的亲核加合物迅速反应，形成相应的硼化产物。

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来源期刊

Journal of Catalysis 工程技术-工程：化工

CiteScore

12.30

自引率

5.50%

发文量

447

审稿时长

31 days

期刊介绍： The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes. The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods. The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.