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  Photodissociation of aligned CH3I and C6H3F2I molecules probed with time-resolved Coulomb explosion imaging by site-selective extreme ultraviolet ionization.

Amini, K., Savelyev, E., Brausse, F., Berrah, N., Bomme, C., Brouard, M., et al. (2018). Photodissociation of aligned CH3I and C6H3F2I molecules probed with time-resolved Coulomb explosion imaging by site-selective extreme ultraviolet ionization. Structural Dynamics, 5(1): 014301. doi:10.1063/1.4998648.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-F4E4-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1E3B-B
Genre: Journal Article

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 Creators:
Amini, K., Author
Savelyev, E., Author
Brausse, F., Author
Berrah, N., Author
Bomme, C., Author
Brouard, M., Author
Burt, M., Author
Christensen, L., Author
Düsterer, S., Author
Erk, B., Author
Höppner, H., Author
Kierspel, T., Author
Krecinic, F., Author
Lauer, A., Author
Lee, J. W. L., Author
Müller, M., Author
Müller, E., Author
Mullins, T., Author
Redlin, H., Author
Schirmel, N., Author
Thogersen, J., AuthorTechert, S.1, Author              Toleikis, S., AuthorTreusch, R., AuthorTrippel, S., AuthorUlmer, A., AuthorVallance, C., AuthorWiese, J., AuthorJohnsson, P., AuthorKüpper, J., AuthorRudenko, A., AuthorRouzee, A., AuthorStapelfeldt, H., AuthorRolles, D., AuthorBoll, R.1, Author               more..
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for biophysical chemistry, Max Planck Society, ou_578564              

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 Abstract: We explore time-resolved Coulomb explosion induced by intense, extreme ultraviolet (XUV) femtosecond pulses from a free-electron laser as a method to image photo-induced molecular dynamics in two molecules, iodomethane and 2,6-difluoroiodobenzene. At an excitation wavelength of 267 nm, the dominant reaction pathway in both molecules is neutral dissociation via cleavage of the carbon-iodine bond. This allows investigating the influence of the molecular environment on the absorption of an intense, femtosecond XUV pulse and the subsequent Coulomb explosion process. We find that the XUV probe pulse induces local inner-shell ionization of atomic iodine in dissociating iodomethane, in contrast to non-selective ionization of all photofragments in difluoroiodobenzene. The results reveal evidence of electron transfer from methyl and phenyl moieties to a multiply charged iodine ion. In addition, indications for ultrafast charge rearrangement on the phenyl radical are found, suggesting that time-resolved Coulomb explosion imaging is sensitive to the localization of charge in extended molecules.

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Language(s): eng - English
 Dates: 2018-01-25
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.4998648
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Title: Structural Dynamics
Source Genre: Journal
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Pages: 14 Volume / Issue: 5 (1) Sequence Number: 014301 Start / End Page: - Identifier: -