Zhang, Weiqi

[["dc.bibliographiccitation.artnumber","103011"],["dc.bibliographiccitation.journal","New Journal of Physics"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Kunnus, Kristjan"],["dc.contributor.author","Josefsson, Ida"],["dc.contributor.author","Rajkovic, Ivan"],["dc.contributor.author","Schreck, Simon"],["dc.contributor.author","Quevedo, Wilson"],["dc.contributor.author","Beye, Martin"],["dc.contributor.author","Greubel, Sebastian"],["dc.contributor.author","Scholz, Mirko"],["dc.contributor.author","Nordlund, Dennis"],["dc.contributor.author","Zhang, W."],["dc.contributor.author","Hartsock, Robert W."],["dc.contributor.author","Gaffney, Kelly J."],["dc.contributor.author","Schlotter, William F."],["dc.contributor.author","Turner, Joshua J."],["dc.contributor.author","Kennedy, Brian"],["dc.contributor.author","Hennies, Franz"],["dc.contributor.author","Techert, Simone"],["dc.contributor.author","Wernet, Philippe"],["dc.contributor.author","Odelius, Michael"],["dc.contributor.author","Foehlisch, Alexander"],["dc.date.accessioned","2018-11-07T10:07:45Z"],["dc.date.available","2018-11-07T10:07:45Z"],["dc.date.issued","2016"],["dc.description.abstract","Ultrafast electronic and structural dynamics of matter govern rate and selectivity of chemical reactions, as well as phase transitions and efficient switching in functional materials. Since x-rays determine electronic and structural properties with elemental, chemical, orbital and magnetic selectivity, short pulse x-ray sources have become central enablers of ultrafast science. Despite of these strengths, ultrafast x-rays have been poor at picking up excited state moieties from the unexcited ones. With time-resolved anti-Stokes resonant x-ray Raman scattering (AS-RXRS) performed at the LCLS, and ab initio theory we establish background free excited state selectivity in addition to the elemental, chemical, orbital and magnetic selectivity of x-rays. This unparalleled selectivity extracts low concentration excited state species along the pathway of photo induced ligand exchange of Fe(CO)(5) in ethanol. Conceptually a full theoretical treatment of all accessible insights to excited state dynamics with AS-RXRS with transform-limited x-ray pulses is given-which will be covered experimentally by upcoming transform-limited x-ray sources."],["dc.identifier.doi","10.1088/1367-2630/18/10/103011"],["dc.identifier.isi","000386047000005"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13971"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39338"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","info:eu-repo/grantAgreement/EC/H2020/669531/EU/Beating Complexity through Selectivity:Excited state Dynamics from Anti-Stokes and non-linear resonant inelastic X-ray scattering/EDAX"],["dc.relation.issn","1367-2630"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.rights","CC BY 3.0"],["dc.title","Anti-Stokes resonant x-ray Raman scattering for atom specific and excited state selective dynamics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","043204"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Structural Dynamics"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Kunnus, Kristjan"],["dc.contributor.author","Josefsson, Ida"],["dc.contributor.author","Rajkovic, Ivan"],["dc.contributor.author","Schreck, Simon"],["dc.contributor.author","Quevedo, Wilson"],["dc.contributor.author","Beye, Martin"],["dc.contributor.author","Weniger, C."],["dc.contributor.author","Gruebel, S."],["dc.contributor.author","Scholz, M."],["dc.contributor.author","Nordlund, D."],["dc.contributor.author","Zhang, W."],["dc.contributor.author","Hartsock, Robert W."],["dc.contributor.author","Gaffney, Kelly J."],["dc.contributor.author","Schlotter, William F."],["dc.contributor.author","Turner, Joshua J."],["dc.contributor.author","Kennedy, Brian"],["dc.contributor.author","Hennies, F."],["dc.contributor.author","de Groot, F. M. F."],["dc.contributor.author","Techert, Simone"],["dc.contributor.author","Odelius, Michael"],["dc.contributor.author","Wernet, Ph."],["dc.contributor.author","Foehlisch, Alexander"],["dc.date.accessioned","2018-11-07T10:11:53Z"],["dc.date.available","2018-11-07T10:11:53Z"],["dc.date.issued","2016"],["dc.description.abstract","We utilized femtosecond time-resolved resonant inelastic X-ray scattering and ab initio theory to study the transient electronic structure and the photoinduced molecular dynamics of a model metal carbonyl photocatalyst Fe(CO)(5) in ethanol solution. We propose mechanistic explanation for the parallel ultrafast intra-molecular spin crossover and ligation of the Fe(CO)(4) which are observed following a charge transfer photoexcitation of Fe(CO)(5) as reported in our previous study [ Wernet et al., Nature 520, 78 (2015)]. We find that branching of the reaction pathway likely happens in the (1)A(1) state of Fe(CO)(4). A sub-picosecond time constant of the spin crossover from B-1(2) to B-3(2) is rationalized by the proposed B-1(2) -> (1)A(1) -> B-3(2) mechanism. Ultrafast ligation of the B-1(2) Fe(CO)(4) state is significantly faster than the spin-forbidden and diffusion limited ligation process occurring from the B-3(2) Fe(CO)(4) ground state that has been observed in the previous studies. We propose that the ultrafast ligation occurs via B-1(2) -> (1)A(1) -> (1)A'Fe(CO)(4)EtOH pathway and the time scale of the (1)A(1) Fe(CO)(4) state ligation is governed by the solute-solvent collision frequency. Our study emphasizes the importance of understanding the interaction of molecular excited states with the surrounding environment to explain the relaxation pathways of photoexcited metal carbonyls in solution. (C) 2016 Author(s)."],["dc.identifier.doi","10.1063/1.4941602"],["dc.identifier.isi","000383880700006"],["dc.identifier.pmid","26958587"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13794"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40130"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.publisher.place","Melville"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area C | C02 In situ hochauflösende Untersuchung des aktiven Zustands bei der photo- und elektrochemischen Wasserspaltung"],["dc.relation.eventlocation","Berlin, GERMANY"],["dc.relation.issn","2329-7778"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.rights","CC BY 3.0"],["dc.title","Identification of the dominant photochemical pathways and mechanistic insights to the ultrafast ligand exchange of Fe(CO)(5) to Fe(CO)(4)EtOH"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]