2024
Water Ligands Regulate the Redox Leveling Mechanism of the Oxygen-Evolving Complex of the Photosystem II
Liu J, Yang K, Long Z, Armstrong W, Brudvig G, Batista V. Water Ligands Regulate the Redox Leveling Mechanism of the Oxygen-Evolving Complex of the Photosystem II. Journal Of The American Chemical Society 2024, 146: 15986-15999. PMID: 38833517, DOI: 10.1021/jacs.4c02926.Peer-Reviewed Original ResearchProton-coupled electron transferOxygen-evolving complexWater insertionWater ligandsCatalytic cycleMolecular dynamicsO-O bondQuantum mechanics/molecular mechanicsConformational changesFree energy changeLigand environmentElectron transferLigand exchangePhotosystem IIOxygen evolutionWater binding mechanismsEnergy changeLigandBinding mechanismAqueous environmentRedoxWater bindingLigand bindingCatalystIsomerization
2015
Mechanism of Manganese-Catalyzed Oxygen Evolution from Experimental and Theoretical Analyses of 18O Kinetic Isotope Effects
Khan S, Yang K, Ertem M, Batista V, Brudvig G. Mechanism of Manganese-Catalyzed Oxygen Evolution from Experimental and Theoretical Analyses of 18O Kinetic Isotope Effects. ACS Catalysis 2015, 5: 7104-7113. DOI: 10.1021/acscatal.5b01976.Peer-Reviewed Original ResearchBiomimetic oxomanganese complexesO2 evolutionOxomanganese complexesElusive reaction intermediatesKinetic oxygen isotope effectO2-evolving complexPhotosystem IIFirst bindsTurnover conditionsPrevious kinetic studiesComplexesOxygen evolutionComplete mechanismEvolutionMechanismSpeciesBindsStrong evidenceIntermediatesTurnoverHighest barrier stepKinetic isotope effectsTriplet Oxygen Evolution Catalyzed by a Biomimetic Oxomanganese Complex: Functional Role of the Carboxylate Buffer
Rivalta I, Yang K, Brudvig G, Batista V. Triplet Oxygen Evolution Catalyzed by a Biomimetic Oxomanganese Complex: Functional Role of the Carboxylate Buffer. ACS Catalysis 2015, 5: 2384-2390. DOI: 10.1021/acscatal.5b00048.Peer-Reviewed Original ResearchOxomanganese complexesTriplet oxygenOxygen evolutionWater splittingCatalytic oxygen evolutionO bond formationBiomimetic oxomanganese complexesNucleophilic water moleculeUnderlying reaction mechanismGreen plant chloroplastsPhotosynthetic oxygen evolutionWater ligandsCarboxylate ligandsInorganic coreMn complexesSuperoxo speciesNoninnocent roleCarboxylate groupsWater moleculesSubstrate waterBond formationSynthetic complexesCarboxylate buffersNucleophilic attackRedox potential
2012
Oxomanganese complexes for natural and artificial photosynthesis
Rivalta I, Brudvig GW, Batista VS. Oxomanganese complexes for natural and artificial photosynthesis. Current Opinion In Chemical Biology 2012, 16: 11-18. PMID: 22481113, PMCID: PMC3335890, DOI: 10.1016/j.cbpa.2012.03.003.Peer-Reviewed Original ResearchConceptsOxygen-evolving complexOxomanganese complexesArtificial photosynthesisQuantum mechanics/molecular mechanics (QM/MM) hybrid methodsArtificial photosynthetic devicesVisible-light photoexcitationInterfacial electron transferRecent X-ray dataX-ray crystallographyPhotosystem IIPhotosynthetic devicesMn catalystStructure/function relationsX-ray dataCarboxylate moietyElectron transferProton abstractionMn centersChromophoric linkersElectrostatic interactionsOEC structureCovalent attachmentS1 stateOxygen evolutionInexpensive materials
2011
Structural–Functional Role of Chloride in Photosystem II
Rivalta I, Amin M, Luber S, Vassiliev S, Pokhrel R, Umena Y, Kawakami K, Shen JR, Kamiya N, Bruce D, Brudvig GW, Gunner MR, Batista VS. Structural–Functional Role of Chloride in Photosystem II. Biochemistry 2011, 50: 6312-6315. PMID: 21678923, PMCID: PMC3140697, DOI: 10.1021/bi200685w.Peer-Reviewed Original Research