5 years ago

Capturing the Role of Explicit Solvent in the Dimerization of RuV(bda) Water Oxidation Catalysts

Capturing the Role of Explicit Solvent in the Dimerization of RuV(bda) Water Oxidation Catalysts
Shina C. L. Kamerlin, Shaoqi Zhan, Mårten S. G. Ahlquist, Daniel Mårtensson, Miha Purg
A ground-breaking empirical valence bond study for a soluble transition-metal complex is presented. The full reaction of catalyst monomers approaching and reacting in the RuV oxidation state were studied. Analysis of the solvation shell in the reactant and along the reaction coordinate revealed that the oxo itself is hydrophobic, which adds a significant driving force to form the dimer. The effect of the solvent on the reaction between the prereactive dimer and the product was small. The solvent seems to lower the barrier for the isoquinoline (isoq) complex while it is increased for pyridines. By comparing the reaction in the gas phase and solution, the proposed π-stacking interaction of the isoq ligands is found to be entirely driven by the water medium. A cat in water: An empirical valence bond study of the Ru(bda)L2 water oxidation catalysts with full explicit solvation reveals the hydrophobic nature of the key RuV=O intermediate.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701488

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