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Energy-dependent ti...
Energy-dependent timescales in the dissociation of diiodothiophene dication
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- Kukk, E. (författare)
- Department of Physics and Astronomy, University of Turku, Finland; CNRS, Laboratoire de Chimie Physique, France,Centre d'Ecologie Fonctionnelle et Evolutive (CEFE)
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- Pihlava, L. (författare)
- Department of Physics and Astronomy, University of Turku, Finland
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- Kooser, K. (författare)
- Department of Physics and Astronomy, University of Turku, Finland; Institute of Physics, University of Tartu,Estonia
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- Stråhlman, Christian, Filosofie doktor, 1987- (författare)
- Malmö University,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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- Maclot, Sylvain, 1986 (författare)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Department of Physics, Gothenburg University
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- Kivimäki, Antti (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 25:7, s. 5795-5807
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Abstract
Ämnesord
Stäng
- Photodissociation molecular dynamics of gas-phase 2,5-diiodothiophene molecules was studied in an electron-energy-resolved electron-multi-ion coincidence experiment performed at the FinEstBeAMS beamline of MAX IV synchrotron. Following the photoionization of the iodine 4d subshell and the Auger decay, the dissociation landscape of the molecular dication was investigated as a function of the Auger electron energy. Concentrating on an major dissociation pathway, C4H2I2S2+ -> C4H2S+ + I+ + I, and accessing the timescales of the process via ion momentum correlation analysis, it was revealed how this three-body process changes depending on the available internal energy. Using a generalized secondary dissociation model, the process was shown to evolve from secondary dissociation regime towards concerted dissociation as the available energy increased, with the secondary dissociation time constant changing from 1.5 ps to 129 fs. The experimental results were compared with simulations using a stochastic charge-hopping molecular mechanics model. It represented the observed trend and also gave a fair quantitative agreement with the experiment.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- internal-conversion
- ultrafast dynamics
- molecular-dynamics
- thiophene
- spectroscopy
- charge
- ring
- Chemistry
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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