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Structural dynamics...
Structural dynamics upon photoexcitation-induced charge transfer in a dicopper(i)-disulfide complex
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- Naumova, M. (författare)
- Padernborn University, Germany,Universität Hamburg,University of Hamburg,Deutsches Elektronen-Synchrotron (DESY),Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany;Hamburg Univ, Inst Nanaostruktur & Festkorperphys, D-20355 Hamburg, Germany
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- Khakhulin, Dmitry (författare)
- European XFEL GmbH,Universität Hamburg,University of Hamburg,Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany;European XFEL GmbH, D-22869 Schenefeld, Germany
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- Rebarz, Mateusz (författare)
- Czech Academy of Sciences,Acad Sci Czech Republ, ELI Beamlines, Inst Phys, Prague 18221, Czech Republic
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- Rohrmüller, Martin (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Phys, D-33098 Paderborn, Germany
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- Dicke, B. (författare)
- Universität Hamburg,University of Hamburg,Deutsches Elektronen-Synchrotron (DESY),Hamburg Univ, Inst Nanaostruktur & Festkorperphys, D-20355 Hamburg, Germany
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- Biednov, M. (författare)
- Deutsches Elektronen-Synchrotron (DESY),Universität Hamburg,University of Hamburg,Hamburg Univ, Inst Nanaostruktur & Festkorperphys, D-20355 Hamburg, Germany
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- Britz, Alexander (författare)
- European XFEL GmbH,Universität Hamburg,University of Hamburg,Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany;European XFEL GmbH, D-22869 Schenefeld, Germany
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- Espinoza, Shirly (författare)
- Czech Academy of Sciences,Acad Sci Czech Republ, ELI Beamlines, Inst Phys, Prague 18221, Czech Republic
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- Grimm-Lebsanft, B. (författare)
- Universität Hamburg,University of Hamburg,Deutsches Elektronen-Synchrotron (DESY),Hamburg Univ, Inst Nanaostruktur & Festkorperphys, D-20355 Hamburg, Germany
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- Kloz, Miroslav (författare)
- Czech Academy of Sciences,Acad Sci Czech Republ, ELI Beamlines, Inst Phys, Prague 18221, Czech Republic
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- Kretzschmar, Norman (författare)
- European Synchrotron Radiation Facility (ESRF),European Synchrotron Radiat Facil, F-38000 Grenoble, France
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- Neuba, Adam (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany
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- Ortmeyer, Jochen (författare)
- Padernborn University, Germany,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany
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- Schoch, Roland (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany
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- Andreasson, Jakob, 1975 (författare)
- Uppsala universitet,Molekylär biofysik,Acad Sci Czech Republ, ELI Beamlines, Inst Phys, Prague 18221, Czech Republic;Chalmers Univ Technol, Condensed Matter Phys, Dept Phys, Gothenburg, Sweden;DESY, Ctr Free Elect Laser Sci, D-22607 Hamburg, Germany
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- Bauer, Matthias (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany
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- Bressler, C. (författare)
- Universität Hamburg,University of Hamburg,European XFEL GmbH,Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany;European XFEL GmbH, D-22869 Schenefeld, Germany
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- Gero Schmidt, Wolf (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Phys, D-33098 Paderborn, Germany
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- Henkel, Gerald (författare)
- Padernborn University, Germany,Paderborn Univ, Dept Chem, D-33098 Paderborn, Germany
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- Rübhausen, M. (författare)
- Deutsches Elektronen-Synchrotron (DESY),Universität Hamburg,University of Hamburg,Hamburg Univ, Inst Nanaostruktur & Festkorperphys, D-20355 Hamburg, Germany
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(creator_code:org_t)
- 2018
- 2018
- Engelska.
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Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 20:9, s. 6274-6286
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Abstract
Ämnesord
Stäng
- The structural dynamics of charge-transfer states of nitrogen-ligated copper complexes has been extensively investigated in recent years following the development of pump-probe X-ray techniques. In this study we extend this approach towards copper complexes with sulfur coordination and investigate the influence of charge transfer states on the structure of a dicopper(i) complex with coordination by bridging disulfide ligands and additionally tetramethylguanidine units [Cu I 2 (NSSN) 2 ] 2+ . In order to directly observe and refine the photoinduced structural changes in the solvated complex we applied picosecond pump-probe X-ray absorption spectroscopy (XAS) and wide-angle X-ray scattering (WAXS). Additionally, the ultrafast evolution of the electronic excited states was monitored by femtosecond transient absorption spectroscopy in the UV-Vis probe range. DFT calculations were used to predict molecular geometries and electronic structures of the ground and metal-to-ligand charge transfer states with singlet and triplet spin multiplicities, i.e. S 0 , 1 MLCT and 3 MLCT, respectively. Combining these techniques we elucidate the electronic and structural dynamics of the solvated complex upon photoexcitation to the MLCT states. In particular, femtosecond optical transient spectroscopy reveals three distinct timescales of 650 fs, 10 ps and > 100 ps, which were assigned as internal conversion to the ground state (S n → S 0 ), intersystem crossing 1 MLCT → 3 MLCT, and subsequent relaxation of the triplet to the ground state, respectively. Experimental data collected using both X-ray techniques are in agreement with the DFT-predicted structure for the triplet state, where coordination bond lengths change and one of the S-S bridges is cleaved, causing the movement of two halves of the molecule relative to each other. Extended X-ray absorption fine structure spectroscopy resolves changes in Cu-ligand bond lengths with precision on the order of 0.01 Å, whereas WAXS is sensitive to changes in the global shape related to relative movement of parts of the molecule. The results presented herein widen the knowledge on the electronic and structural dynamics of photoexcited copper-sulfur complexes and demonstrate the potential of combining the pump-probe X-ray absorption and scattering for studies on photoinduced structural dynamics in copper-based coordination complexes.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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Naumova, M.
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Khakhulin, Dmitr ...
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Rebarz, Mateusz
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Rohrmüller, Mart ...
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Dicke, B.
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Biednov, M.
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visa fler...
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Britz, Alexander
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Espinoza, Shirly
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Grimm-Lebsanft, ...
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Kloz, Miroslav
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Kretzschmar, Nor ...
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Neuba, Adam
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Ortmeyer, Jochen
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Schoch, Roland
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Andreasson, Jako ...
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Bauer, Matthias
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Bressler, C.
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Gero Schmidt, Wo ...
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Henkel, Gerald
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Rübhausen, M.
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Atom och molekyl ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Teoretisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Fysikalisk kemi
- Artiklar i publikationen
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Physical Chemist ...
- Av lärosätet
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Chalmers tekniska högskola
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Uppsala universitet