Concerted Proton–Electron Transfer Reactivity at a Multimetallic Co<sub>4</sub>O<sub>4</sub> Cubane Cluster
作者:Jaruwan Amtawong、Bastian B. Skjelstad、David Balcells、T. Don Tilley
DOI:10.1021/acs.inorgchem.0c02625
日期:2020.10.19
in oxidative catalysis, but investigations into the chemistry of proton-coupled redox reactions of such species have been limited. Herein, the reactivity of an established water oxidation catalyst, [Co4O4(OAc)4(py)4][PF6], toward H-atom abstraction reactions is described. Mechanistic analyses and density functional theory (DFT) calculations support a concerted proton–electron transfer (CPET) pathway
高价的氧杂钴(IV)物种已被称为氧化催化中的关键中间体,但对此类物质的质子偶联氧化还原反应的化学研究仍受到限制。此处,所建立的水氧化催化剂[Co 4 O 4(OAc)4(py)4 ] [PF 6的反应性对H原子抽象反应进行了描述。机理分析和密度泛函理论(DFT)计算支持协调的质子-电子转移(CPET)途径,其中逐步形成的高能中间体被绕过。自然键轨道(NBO)计算指向在过渡状态合作供体-受体相互作用σ,由此基片的H-原子被转移到轨道离域通过共3(μ 3 -O)片段。机械学的见解为开发由多金属含氧金属簇介导的催化CH活化过程提供了设计原理。