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Title: Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation

Abstract

Time-resolved extreme ultraviolet (XUV) transient absorption spectroscopy of iodomethane and iodobenzene photodissociation at the iodine pre-N{sub 4,5} edge is presented, using femtosecond UV pump pulses and XUV probe pulses from high harmonic generation. For both molecules the molecular core-to-valence absorption lines fade immediately, within the pump-probe time-resolution. Absorption lines converging to the atomic iodine product emerge promptly in CH{sub 3}I but are time-delayed in C{sub 6}H{sub 5}I. We attribute this delay to the initial π → σ{sup *} excitation in iodobenzene, which is distant from the iodine reporter atom. We measure a continuous shift in energy of the emerging atomic absorption lines in CH{sub 3}I, attributed to relaxation of the excited valence shell. An independent particle model is used to rationalize the observed experimental findings.

Authors:
; ; ; ; ; ;
Publication Date:
OSTI Identifier:
22675983
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 145; Journal Issue: 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; DISSOCIATION; EXTREME ULTRAVIOLET RADIATION; HARMONIC GENERATION; IODINE; METHYL IODIDE; PHOTOLYSIS; TIME DELAY; TIME RESOLUTION; TRANSIENTS

Citation Formats

Drescher, L., Galbraith, M. C. E., Reitsma, G., Dura, J., Zhavoronkov, N., Patchkovskii, S., Vrakking, M. J. J., and Mikosch, J., E-mail: jochen.mikosch@mbi-berlin.de. Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation. United States: N. p., 2016. Web. doi:10.1063/1.4955212.
Drescher, L., Galbraith, M. C. E., Reitsma, G., Dura, J., Zhavoronkov, N., Patchkovskii, S., Vrakking, M. J. J., & Mikosch, J., E-mail: jochen.mikosch@mbi-berlin.de. Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation. United States. https://doi.org/10.1063/1.4955212
Drescher, L., Galbraith, M. C. E., Reitsma, G., Dura, J., Zhavoronkov, N., Patchkovskii, S., Vrakking, M. J. J., and Mikosch, J., E-mail: jochen.mikosch@mbi-berlin.de. Thu . "Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation". United States. https://doi.org/10.1063/1.4955212.
@article{osti_22675983,
title = {Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation},
author = {Drescher, L. and Galbraith, M. C. E. and Reitsma, G. and Dura, J. and Zhavoronkov, N. and Patchkovskii, S. and Vrakking, M. J. J. and Mikosch, J., E-mail: jochen.mikosch@mbi-berlin.de},
abstractNote = {Time-resolved extreme ultraviolet (XUV) transient absorption spectroscopy of iodomethane and iodobenzene photodissociation at the iodine pre-N{sub 4,5} edge is presented, using femtosecond UV pump pulses and XUV probe pulses from high harmonic generation. For both molecules the molecular core-to-valence absorption lines fade immediately, within the pump-probe time-resolution. Absorption lines converging to the atomic iodine product emerge promptly in CH{sub 3}I but are time-delayed in C{sub 6}H{sub 5}I. We attribute this delay to the initial π → σ{sup *} excitation in iodobenzene, which is distant from the iodine reporter atom. We measure a continuous shift in energy of the emerging atomic absorption lines in CH{sub 3}I, attributed to relaxation of the excited valence shell. An independent particle model is used to rationalize the observed experimental findings.},
doi = {10.1063/1.4955212},
url = {https://www.osti.gov/biblio/22675983}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 1,
volume = 145,
place = {United States},
year = {2016},
month = {7}
}