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Impact of the Ligand Flexibility and Solvent on the O-O Bond Formation Step in a Highly Active Ruthenium Water Oxidation Catalyst.

ABSTRACT: By advanced molecular dynamics simulations, we show that for a highly active ruthenium-based water oxidation catalyst the dangling carboxylate group of the catalyst plays an important role in the crucial O-O bond formation step. The interplay of the flexible group and solvent molecules facilitates two possible pathways: a direct pathway with a single solvent water molecule or a mediated pathway involving two solvent water molecules, which have similar activation barriers. Our results provide an example for which a realistic molecular dynamics approach, incorporating an explicit description of the solvent, is required to reveal the full complexity of an important catalytic reaction in aqueous solvent.

SUBMITTER: Govindarajan N

PROVIDER: S-EPMC6220359 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Impact of the Ligand Flexibility and Solvent on the O-O Bond Formation Step in a Highly Active Ruthenium Water Oxidation Catalyst.

Govindarajan Nitish N Tiwari Ambuj A Ensing Bernd B Meijer Evert Jan EJ

Inorganic chemistry 20180507 21

By advanced molecular dynamics simulations, we show that for a highly active ruthenium-based water oxidation catalyst the dangling carboxylate group of the catalyst plays an important role in the crucial O-O bond formation step. The interplay of the flexible group and solvent molecules facilitates two possible pathways: a direct pathway with a single solvent water molecule or a mediated pathway involving two solvent water molecules, which have similar activation barriers. Our results provide an ...[more]

PMID: 29732882

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