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Coulomb explosion imaging of CH3I and CH2CII photodissociation dynamics
Univ Oxford, Chem Res Lab, Dept Chem, Oxford OX1 3TA, England.
Univ Oxford, Chem Res Lab, Dept Chem, Oxford OX1 3TA, England.ORCID iD: 0000-0002-7317-8649
Univ Oxford, Chem Res Lab, Dept Chem, Oxford OX1 3TA, England.
Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany.
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2018 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 149, no 20, article id 204313Article in journal (Refereed) Published
Abstract [en]

The photodissociation dynamics of CH3I and CH2CII at 272 nm were investigated by time-resolved Coulomb explosion imaging, with an intense non-resonant 815nmprobe pulse. Fragment ion momenta over a widem/z range were recorded simultaneously by coupling a velocity map imaging spectrometer with a pixel imaging mass spectrometry camera. For both molecules, delay-dependent pump-probe features were assigned to ultraviolet-induced carbon-iodine bond cleavage followed by Coulomb explosion. Multi-mass imaging also allowed the sequential cleavage of both carbon-halogen bonds in CH2ClI to be investigated. Furthermore, delay-dependent relative fragment momenta of a pair of ions were directly determined using recoil-frame covariance analysis. These results are complementary to conventional velocity map imaging experiments and demonstrate the application of time-resolved Coulomb explosion imaging to photoinduced real-time molecular motion.

Place, publisher, year, edition, pages
2018. Vol. 149, no 20, article id 204313
National Category
Physical Chemistry Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-372710DOI: 10.1063/1.5041381ISI: 000451745000028PubMedID: 30501230OAI: oai:DiVA.org:uu-372710DiVA, id: diva2:1277008
Funder
EU, FP7, Seventh Framework Programme, 238671EU, FP7, Seventh Framework Programme, FP7/2007-2013EU, FP7, Seventh Framework Programme, ERC-Kupper-614507EU, Horizon 2020, 641789German Research Foundation (DFG), RO 4577/1-1Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-09Bibliographically approved

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Piancastelli, Maria Novella

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