2021
Proton exit pathways surrounding the oxygen evolving complex of photosystem II
Kaur D, Zhang Y, Reiss KM, Mandal M, Brudvig GW, Batista VS, Gunner MR. Proton exit pathways surrounding the oxygen evolving complex of photosystem II. Biochimica Et Biophysica Acta (BBA) - Bioenergetics 2021, 1862: 148446. PMID: 33964279, DOI: 10.1016/j.bbabio.2021.148446.Peer-Reviewed Original ResearchConceptsOxygen-Evolving ComplexMulti-Conformation Continuum ElectrostaticsWater-filled channelsMolecular dynamicsSubstrate water moleculesHydrogen bond network analysisProton exit pathwayPhotosynthetic electron transfer chainProton transfer pathPhotosystem IISimilar free energiesInorganic coreWater chainWater moleculesAqueous surfaceElectron transfer chainContinuum electrostaticsProduct oxygenFree energyTransfer chainLarge channelsLikely exitTransfer pathLumenal sideComplexes
2016
Hot Hole Hopping in a Polyoxotitanate Cluster Terminated with Catechol Electron Donors
Bao J, Gundlach L, Yu Z, Benedict J, Snoeberger R, Batista V, Coppens P, Piotrowiak P. Hot Hole Hopping in a Polyoxotitanate Cluster Terminated with Catechol Electron Donors. The Journal Of Physical Chemistry C 2016, 120: 20006-20015. DOI: 10.1021/acs.jpcc.6b06042.Peer-Reviewed Original ResearchPolyoxotitanate clustersQuantum dynamics simulationsIntramolecular vibrational relaxationHole hoppingUltrafast spectroscopyPolaronic excitonsWavepacket propagationInjected electronsPolaronic statesVibrational relaxationCharge transfer bandCharge-separated stateHot holesConduction bandMolecular orbitalsElectronsDepolarization measurementsCatechol ligandInorganic coreCatechol siteCatechol moietyHoppingHolesElectron donorTiO2 core
2015
Triplet 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
2010
Study of Proton Coupled Electron Transfer in a Biomimetic Dimanganese Water Oxidation Catalyst with Terminal Water Ligands
Wang T, Brudvig GW, Batista VS. Study of Proton Coupled Electron Transfer in a Biomimetic Dimanganese Water Oxidation Catalyst with Terminal Water Ligands. Journal Of Chemical Theory And Computation 2010, 6: 2395-2401. PMID: 20827389, PMCID: PMC2935188, DOI: 10.1021/ct1002658.Peer-Reviewed Original ResearchTerminal water ligandsWater ligandsOxomanganese complexesElectron transferRedox potentialProton Coupled Electron TransferWater oxidation catalystsCyclic voltammogram measurementsLewis base moietyOxidation of waterFree energy calculationsInorganic coreOxidation potentialOxidation statePrimary oxidantOxidation catalystMn centersBase moietyEnergy calculationsBiomimetic modelLigandsAnalogous conversionOxidationFree energyPhotosystem II
2008
Computational insights into the O2-evolving complex of photosystem II
Sproviero EM, McEvoy JP, Gascón JA, Brudvig GW, Batista VS. Computational insights into the O2-evolving complex of photosystem II. Photosynthesis Research 2008, 97: 91-114. PMID: 18483777, PMCID: PMC2728911, DOI: 10.1007/s11120-008-9307-0.Peer-Reviewed Original ResearchConceptsOxygen-evolving complexX-ray diffractionQuantum mechanics/molecular mechanics (QM/MM) hybrid methodsPhotosystem IIMass spectrometryX-ray absorption fine structure spectroscopyExtended X-ray absorption fine structure (EXAFS) spectroscopyQM/MM modelingElectron paramagnetic resonance spectroscopyAbsorption fine structure spectroscopyCatalytic metal clustersWater splitting reactionIntermediate oxidation statesParamagnetic resonance spectroscopyFine structure spectroscopyO2-evolving complexDensity functional theoryInorganic coreMM modelingOxidation stateMetal clustersStructure spectroscopyOEC structureCrystallographic resultsComputational insights
2006
Characterization of synthetic oxomanganese complexes and the inorganic core of the O2-evolving complex in photosystem II: Evaluation of the DFT/B3LYP level of theory
Sproviero EM, Gascon JA, McEvoy JP, Brudvig GW, Batista VS. Characterization of synthetic oxomanganese complexes and the inorganic core of the O2-evolving complex in photosystem II: Evaluation of the DFT/B3LYP level of theory. Journal Of Inorganic Biochemistry 2006, 100: 786-800. PMID: 16510187, DOI: 10.1016/j.jinorgbio.2006.01.017.Peer-Reviewed Original ResearchConceptsDFT/B3LYP levelOxomanganese complexesDFT/B3LYPB3LYP levelDensity functional theory (DFT) B3LYP levelBecke-3-LeeOxygen-evolving complexPhotosystem IISpin electronic statesInorganic coreImidazole ligandsMn complexesMu-oxoMagnetic experimental dataElectronic propertiesModest basis setsBasis setHybrid densityMechanistic studiesMn trimersComplexesMagnetic propertiesB3LYPTetramerBenchmark calculations