2024
Optical Pump THz Probe Spectroscopy on Metal-Organic Frameworks
Ostresh S, Nyakuchena J, Streater D, Wang D, Cody C, Hooper R, Zhang X, Reinhart B, Ma Q, He P, Brudvig G, Huang J, Neu J. Optical Pump THz Probe Spectroscopy on Metal-Organic Frameworks. 2024, fw4i.3. DOI: 10.1364/cleo_fs.2024.fw4i.3.Peer-Reviewed Original ResearchMetal-organic frameworksOptical pump-THz probePorous crystalline metal-organic frameworksCrystalline metal-organic frameworksCatalytic activity measurementsElectro-optical applicationsMetal centerProbe spectroscopyOptical pump-THz probe spectroscopyUltrafast photoconductivityPhotoconductivityTHz-probe spectroscopyPhotophysicsCatalysisChemical compositionTHz probeSpectroscopyMaterialsMetalChemical
2023
Dominant Role of Hole Transport Pathway in Achieving Record High Photoconductivity in Two‐Dimensional Metal–Organic Frameworks
Wang D, Ostresh S, Streater D, He P, Nyakuchena J, Ma Q, Zhang X, Neu J, Brudvig G, Huang J. Dominant Role of Hole Transport Pathway in Achieving Record High Photoconductivity in Two‐Dimensional Metal–Organic Frameworks. Angewandte Chemie 2023, 135 DOI: 10.1002/ange.202309505.Peer-Reviewed Original ResearchTransient absorption spectroscopyX-ray transient absorption spectroscopyPhotoelectric devicesAbsorption spectroscopyOptical transient absorption spectroscopyTime-resolved terahertz spectroscopyHigh photoconductivityHole transport mechanismTwo-dimensional metalsElectron dynamicsDensity functional theory calculationsTerahertz spectroscopyElectronic statesFunctional theory calculationsMetal-organic frameworksPhotoconductivityTheory calculationsCharge transportMobile chargesSpectroscopyHole transport pathwaysCharge transport pathwaysDominant Role of Hole Transport Pathway in Achieving Record High Photoconductivity in Two‐Dimensional Metal–Organic Frameworks
Wang D, Ostresh S, Streater D, He P, Nyakuchena J, Ma Q, Zhang X, Neu J, Brudvig G, Huang J. Dominant Role of Hole Transport Pathway in Achieving Record High Photoconductivity in Two‐Dimensional Metal–Organic Frameworks. Angewandte Chemie International Edition 2023, 62: e202309505. PMID: 37872121, DOI: 10.1002/anie.202309505.Peer-Reviewed Original ResearchTransient absorption spectroscopyX-ray transient absorption spectroscopyPhotoelectric devicesAbsorption spectroscopyOptical transient absorption spectroscopyTime-resolved terahertz spectroscopyHigh photoconductivityHole transport mechanismTwo-dimensional metalsElectron dynamicsDensity functional theory calculationsTerahertz spectroscopyElectronic statesFunctional theory calculationsMetal-organic frameworksPhotoconductivityTheory calculationsCharge transportMobile chargesSpectroscopyHole transport pathwaysCharge transport pathwaysTwo-Dimensional Electronic Spectroscopy of the Far-Red-Light Photosystem II Reaction Center
Silori Y, Willow R, Nguyen H, Shen G, Song Y, Gisriel C, Brudvig G, Bryant D, Ogilvie J. Two-Dimensional Electronic Spectroscopy of the Far-Red-Light Photosystem II Reaction Center. The Journal Of Physical Chemistry Letters 2023, 14: 10300-10308. PMID: 37943008, DOI: 10.1021/acs.jpclett.3c02604.Peer-Reviewed Original ResearchTwo-dimensional electronic spectroscopyCharge separation mechanismPhotosystem II reaction centerElectronic spectroscopyPrimary charge separationReaction centersSpectral congestionPrimary energy conversionCharge separationVisible lightFar-red lightRadical pairSpectral overlapPrimary electron acceptorConstituent pigmentsFAR-REDSpectroscopyLightEnergy conversionSeparation mechanismElectron acceptorOptical Pump THz Probe Spectroscopy on Metal-Organic Frameworks
Ostresh S, Nyakuchena J, Streater D, Cody C, Hooper R, Zhang X, Reinhart B, Brudvig G, Huang J, Neu J. Optical Pump THz Probe Spectroscopy on Metal-Organic Frameworks. 2023, 00: 1-1. DOI: 10.1109/irmmw-thz57677.2023.10299057.Peer-Reviewed Original Research
2022
THz-Photoconductivity and THz-Conductivity in Metal-Organic Frameworks (MOFs)
Neu J, Ostresh S, Pattengale B, Brudvig G. THz-Photoconductivity and THz-Conductivity in Metal-Organic Frameworks (MOFs). 2022, 00: 1-4. DOI: 10.1109/irmmw-thz50927.2022.9895557.Peer-Reviewed Original Research
2021
Tuning the Conduction Band for Interfacial Electron Transfer: Dye-Sensitized Sn x Ti1–x O2 Photoanodes for Water Splitting
Spies J, Swierk J, Kelly H, Capobianco M, Regan K, Batista V, Brudvig G, Schmuttenmaer C. Tuning the Conduction Band for Interfacial Electron Transfer: Dye-Sensitized Sn x Ti1–x O2 Photoanodes for Water Splitting. ACS Applied Energy Materials 2021, 4: 4695-4703. DOI: 10.1021/acsaem.1c00305.Peer-Reviewed Original ResearchDFT calculationsAbsorption spectroscopyInterfacial electron transfer dynamicsUltrafast transient absorption spectroscopyInterfacial electron transferElectron transfer dynamicsUltrafast electron injectionConduction bandPeriodic DFT calculationsTransient absorption spectroscopyLinear absorption spectroscopyDye sensitizersWater splittingElectron transferTransfer dynamicsComposition of SnElectron acceptorAbsorption spectraElectron injectionD characterElectronic statesSpectroscopyPhotoanodeSnDyeTHz spectroscopy of emerging materials for light driven processes and energy harvesting
Neu J, Pattengale B, Ostresh S, Capobianco M, Brudvig G. THz spectroscopy of emerging materials for light driven processes and energy harvesting. Proceedings Of SPIE--the International Society For Optical Engineering 2021, 11685: 116850x-116850x-8. DOI: 10.1117/12.2591087.Peer-Reviewed Original ResearchTHz spectroscopyMetal-organic frameworksHigh-frequency propertiesTime-domain THz spectroscopyTHz rangeEnergy harvestingGrain boundariesTerahertz spectroscopyElectrical propertiesCarrier lifetimeNovel materialsDC behaviorSuperior designFrequency propertiesOrganic frameworksConductivity methodMaterialsPhonon modesCharge transferLow frequencyPropertiesSpectroscopyTHz-TDS and TRTS of Metal Organic Frameworks and 2D Materials
Neu J, Pattengale B, Ostresh S, Capobianco M, Brudvig G, Schmuttenmaer C. THz-TDS and TRTS of Metal Organic Frameworks and 2D Materials. 2021, 00: 1-1. DOI: 10.1109/irmmw-thz50926.2021.9567198.Peer-Reviewed Original ResearchNelly: An Open-Source Package for Complex Refractive Index Extraction for Terahertz Spectroscopy on Layered Samples
Tayvah U, Spies J, Neu J, Brudvig G, Schmuttenmaer C. Nelly: An Open-Source Package for Complex Refractive Index Extraction for Terahertz Spectroscopy on Layered Samples. 2021, 00: 1-2. DOI: 10.1109/irmmw-thz50926.2021.9567452.Peer-Reviewed Original Research
2018
Direct Interfacial Electron Transfer from High-Potential Porphyrins into Semiconductor Surfaces: A Comparison of Linkers and Anchoring Groups
Jiang J, Spies J, Swierk J, Matula A, Regan K, Romano N, Brennan B, Crabtree R, Batista V, Schmuttenmaer C, Brudvig G. Direct Interfacial Electron Transfer from High-Potential Porphyrins into Semiconductor Surfaces: A Comparison of Linkers and Anchoring Groups. The Journal Of Physical Chemistry C 2018, 122: 13529-13539. DOI: 10.1021/acs.jpcc.7b12405.Peer-Reviewed Original ResearchMetal oxide surfacesDirect interfacial electron transferTime-resolved terahertzInterfacial electron transferOxide surfaceSemiconductor surfacesPhotoelectrochemical stabilitySnO2 substratePhotoelectrochemical cellsInjection yieldTransient spectroscopySurfaceAqueous photoelectrochemical cellDye photosensitizerIET dynamicsTerahertzElectron transferSeries of linkersDirect contactSpectroscopyAbsorption spectroscopyTransferTransient absorption spectroscopyOverall length
2017
Linker Length-Dependent Electron-Injection Dynamics of Trimesitylporphyrins on SnO2 Films
Lee S, Regan K, Hedström S, Matula A, Chaudhuri S, Crabtree R, Batista V, Schmuttenmaer C, Brudvig G. Linker Length-Dependent Electron-Injection Dynamics of Trimesitylporphyrins on SnO2 Films. The Journal Of Physical Chemistry C 2017, 121: 22690-22699. DOI: 10.1021/acs.jpcc.7b07855.Peer-Reviewed Original ResearchDye-sensitized photoelectrochemical cellsElectron injection dynamicsPhotoelectrochemical cellsLinker lengthMetal oxide filmsMolecular photosensitizersPorphyrin coreAnchor groupsElectron acceptorInjection dynamicsLinkerSnO2 filmsOxide filmsFilmsTerphenyleneSystematic studyPhenylenePorphyrinsBiphenyleneSpectroscopyComputational modelingAcceptorPhotosensitizerSynthesisOxide
2011
An Iridium(IV) Species, [Cp*Ir(NHC)Cl]+, Related to a Water-Oxidation Catalyst
Brewster T, Blakemore J, Schley N, Incarvito C, Hazari N, Brudvig G, Crabtree R. An Iridium(IV) Species, [Cp*Ir(NHC)Cl]+, Related to a Water-Oxidation Catalyst. Organometallics 2011, 30: 965-973. DOI: 10.1021/om101016s.Peer-Reviewed Original ResearchWater oxidation catalystsOne-electron stepsX-ray crystallographyWingtip groupsElectrochemical characterizationLigand environmentElectrochemical behaviorOxidation stateEPR spectroscopyNew compoundsCatalystRhombic symmetryCompoundsΚ2 CC donorsPrecatalystNHCChelatesCrystallographySpectroscopyLigandsCatalyticPrecursorsCharacterizationWater
2009
Deposition of an oxomanganese water oxidation catalyst on TiO 2 nanoparticles : computational modeling, assembly and characterization
Li G, Sproviero E, Snoeberger R, Iguchi N, Blakemore J, Crabtree R, Brudvig G, Batista V. Deposition of an oxomanganese water oxidation catalyst on TiO 2 nanoparticles : computational modeling, assembly and characterization. Energy & Environmental Science 2009, 2: 230-238. DOI: 10.1039/b818708h.Peer-Reviewed Original ResearchWater oxidation catalystsOxidation catalystTiO2 nanoparticlesUV-visible spectroscopyTiO 2 nanoparticlesMixed valence stateAmorphous TiO2 nanoparticlesWater ligandsElectrochemical studiesElectrochemical measurementsEPR spectroscopySurface complexesMimic photosynthesisDirect adsorptionSitu synthesisTiO2 surfaceSuccessful attachmentEPR dataNanoparticlesCatalystSolar cellsSpectroscopyComputational modelingAdsorptionEPR
2007
Ultrafast Photooxidation of Mn(II)−Terpyridine Complexes Covalently Attached to TiO2 Nanoparticles
Abuabara S, Cady C, Baxter J, Schmuttenmaer C, Crabtree R, Brudvig G, Batista V. Ultrafast Photooxidation of Mn(II)−Terpyridine Complexes Covalently Attached to TiO2 Nanoparticles. The Journal Of Physical Chemistry C 2007, 111: 11982-11990. DOI: 10.1021/jp072380h.Peer-Reviewed Original ResearchInterfacial electron transferTiO2 nanoparticlesColloidal thin filmsVisible light sensitizationElectron transferTime-resolved measurementsSurface modificationNanoparticlesThin filmsTiO2 surfaceAqueous suspensionTransient measurementsEPR signalPhotoexcitationMeasurementsComputational simulationsFilmsFSSpectroscopyComplexesPhotooxidationTransferSurfaceSignals
2005
General Synthesis of Di-μ-oxo Dimanganese Complexes as Functional Models for the Oxygen Evolving Complex of Photosystem II
Chen H, Tagore R, Das S, Incarvito C, Faller J, Crabtree R, Brudvig G. General Synthesis of Di-μ-oxo Dimanganese Complexes as Functional Models for the Oxygen Evolving Complex of Photosystem II. Inorganic Chemistry 2005, 44: 7661-7670. PMID: 16212393, DOI: 10.1021/ic0509940.Peer-Reviewed Original ResearchConceptsDimanganese complexesCatalytic activitySeries of complexesGeneral preparative methodUV-visible spectroscopyElectrospray mass spectrometryOxygen-Evolving ComplexX-ray crystallographyPhotosystem IIParent complexEPR spectroscopyOxygen-evolving activityGeneral synthesisPreparative methodLigand librariesMass spectrometryHigh product purityComplexesMn dimersSpectroscopyProduct purityPrecursorsTerpyCrystallographyOxoResonance Raman spectroscopy of carotenoids in Photosystem II core complexes
Tracewell C, Cua A, Bocian D, Brudvig G. Resonance Raman spectroscopy of carotenoids in Photosystem II core complexes. Photosynthesis Research 2005, 83: 45-52. PMID: 16143906, DOI: 10.1007/s11120-004-2350-6.Peer-Reviewed Original ResearchConceptsII core complexesPhotosystem II core complexResonance Raman spectroscopyPS II core complexesRaman spectroscopyTrans configurationSecondary electron transfer reactionsElectron transfer reactionsMolecular wiresNeutral carotenoidsRR spectraAbsorption bandsCore complexDifference experimentsReaction centersExcitation wavelengthComplexesSpectroscopyPS IIRR resultsReactionΒ-caroteneSpectraCarotenoidsConfiguration
2003
Two Redox-Active β-Carotene Molecules in Photosystem II †
Tracewell C, Brudvig G. Two Redox-Active β-Carotene Molecules in Photosystem II †. Biochemistry 2003, 42: 9127-9136. PMID: 12885246, DOI: 10.1021/bi0345844.Peer-Reviewed Original ResearchMeSH KeywordsAdaptation, PhysiologicalBeta CaroteneCyanobacteriaDarknessElectron Spin Resonance SpectroscopyFree RadicalsFreezingLight-Harvesting Protein ComplexesNormal DistributionOxidation-ReductionPhotochemistryPhotosynthetic Reaction Center Complex ProteinsPhotosystem II Protein ComplexSpectroscopy, Near-InfraredSpinacia oleraceaTyrosineConceptsSecondary electron transfer pathwayElectron transfer pathwayElectron paramagnetic resonance spectroscopyElectron transfer reactionsElectron transfer pathParamagnetic resonance spectroscopyHole-hopping mechanismPS II core complexesΒ-carotene moleculesPS II membranesII core complexesPhotosystem IIIR spectroscopyPS IILow temperatureCharge separationElectrostatic interactionsOxygen evolutionResonance spectroscopyLow-temperature illuminationInhibited samplesSpectroscopyEquilibrated statePeak variesSynechocystis PCC 6803Pulsed High-Frequency EPR Study on the Location of Carotenoid and Chlorophyll Cation Radicals in Photosystem II
Lakshmi K, Poluektov O, Reifler M, Wagner A, Thurnauer M, Brudvig G. Pulsed High-Frequency EPR Study on the Location of Carotenoid and Chlorophyll Cation Radicals in Photosystem II. Journal Of The American Chemical Society 2003, 125: 5005-5014. PMID: 12708850, DOI: 10.1021/ja0295671.Peer-Reviewed Original ResearchMeSH KeywordsBeta CaroteneBinding SitesCationsChlorophyllCyanobacteriaDeuteriumElectron Spin Resonance SpectroscopyFerrous CompoundsFree RadicalsLight-Harvesting Protein ComplexesOxidation-ReductionPhotosynthetic Reaction Center Complex ProteinsPhotosystem II Protein ComplexProtein ConformationRhodospirillumConceptsHigh-frequency EPR spectroscopyRelaxation enhancementEPR spectroscopyRelaxation ratePS IIElectron donorChlorophyll cation radicalsSpin-lattice relaxation rateWater oxidation complexFrequency EPR StudyPigment-protein complexesPhotosystem IIGreater relaxation enhancementCarotenoid-binding siteCation radicalsChlorophyll radicalsElectron transferAlternate electron donorsEPR studiesEPR signalDistance estimatesReaction centersRadicalsSpectroscopy
2002
Electronic Structure of the P700 Special Pair from High-Frequency Electron Paramagnetic Resonance Spectroscopy
Poluektov O, Utschig L, Schlesselman S, Lakshmi K, Brudvig G, Kothe G, Thurnauer M. Electronic Structure of the P700 Special Pair from High-Frequency Electron Paramagnetic Resonance Spectroscopy. The Journal Of Physical Chemistry B 2002, 106: 8911-8916. DOI: 10.1021/jp021465+.Peer-Reviewed Original ResearchElectron paramagnetic resonance spectroscopyParamagnetic resonance spectroscopyTriplet stateFrequency Electron Paramagnetic Resonance SpectroscopyElectronic structureHigh-frequency electron paramagnetic resonance spectroscopyResonance spectroscopyPrimary donorPrimary donor cationPhotosynthetic reaction centersHigh-frequency EPRDonor cationI. Electronic structureElectronic characterReaction centersValue anisotropySpecial pairTensor axesCationsSpectroscopyPhotosystem IP700T stateEPRStructure