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Iron-Catalysed C(sp^(2))-H Borylation with Expanded Functional Group Tolerance

Chinese Journal of Chemistry 2022年第24期40卷 2875-2881页

作者： Luke Britton Jamie H.Docherty Gary S.Nichol Andrew P.Dominey Stephen P.Thomas EaStCHEM School of Chemistry University of EdinburghEdinburghEH93FJ United Kingdom GSK Medicines Research Centre StevenageSG12NY United Kingdom

Arene C(sp^(2))-H bond borylation offers direct and efficient access to aryl boronic esters.Using in situ catalyst activation and photoirradiation,the iron-catalysed C(sp^(2))-H borylation reaction of carboarenes,pyrroles,and indoles has been developed using only bench-stable pre-catalysts and reagents.Good functional group tolerance was observed including those not reported using previous methods(ArNH_(2),ArOH,ArSiR_(3),ArP(O)(O)_(2),ArC(O)NR_(2)).Mechanistic studies revealed iron-catalysed reductive deoxygenation,C—F protodefluorination,and a demethylation of aryl methyl ethers by C—O sigma bond hydroboration.

关键词： Iron Earth-abundant C-H borylation Boron Photochemistry

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Metal-organic framework based nanomaterials for electrocatalytic oxygen redox reaction

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Science China Chemistry 2019年第4期62卷 417-429页

作者： Kexin Zhang Wenhan Guo Zibin Liang Ruqiang Zou Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Department of Materials Science and EngineeringCollege of Engineering Peking University

Due to the severe environmental issues, many advanced technologies, typically fuel cells and metal-air batteries have aroused widespread concerns and been intensively studied in recent years. However, oxygen redox reactions including oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) as the core reactions suffer from sluggish kinetics of the multiple electron transfer process. Currently, Pt, RuO_2, and IrO_2 are considered to be the benchmark catalysts for ORR and OER, but their high price, scarcity and instability hinder them from large-scale application. To overcome these limits, exploring alternative electrocatalysts with low cost, high activity, long-term stability, and earth-abundance is of extreme urgency. Metal-organic frameworks(MOFs) are a family of inorganic-organic hybrid materials with high surface areas and tunable structures, making them proper as catalyst candidates. Herein, the recent progress of MOFs and MOF-derived materials for ORR and OER is systematically reviewed, and the relationship between compositions and electrochemical performance is discussed. It is expected that this review can be helpful for the future development of related MOF-based materials with excellent electrochemical performance.

关键词： metal-organic frameworks oxygen evolution reaction oxygen reduction reaction Earth-abundant materials electrocatalysis nanomaterials

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