Is Deprotonation of the Oxygen-Evolving Complex of Photosystem II during the S<sub>1</sub> → S<sub>2</sub> Transition Suppressed by Proton Quantum Delocalization?
Ke Yang, K. V. Lakshmi, Gary W. Brudvig, Víctor S. Batista
Abstract
Ca-oxo) cluster, from the "open" to "closed" conformation, a step suggested to be necessary for oxygen evolution from previous studies. Our findings suggest that quantum-delocalized protons, stabilized by low-barrier hydrogen bonds in model catalytic systems, can facilitate the accumulation of multiple oxidizing equivalents at low overpotentials.
Topics & Concepts
ChemistryDelocalized electronProtonProtonationDeprotonationOxygen-evolving complexPhotochemistryHydrogen bondPhotosystem IIChemical physicsMoleculeIonPhotosynthesisOrganic chemistryQuantum mechanicsBiochemistryPhysicsPhotosynthetic Processes and MechanismsPhotoreceptor and optogenetics researchMitochondrial Function and Pathology