piwik-script

Deutsch Intern
    Research group of Ingo Fischer

    Photoionization with Synchrotron Radiation

    We investigate the structure of cations in the VUV-spectral range using synchrotron radiation. We focus on reactive intermediates, like radicals, biradicals, carbenes and reactive boron compounds. We obtain ionisation and appearance energies, data that are relevant for astrochemistry, the chemistry of planetary ionospheres and for the investigation of chemical processes in flames.  Furthermore we study the reaction kinetics of radicals with oxygen and use synchrotron radiation as a tool to detect reactands and products. Recently we extended our work to the soft X-ray regime, where we record Auger-spectra of reactive molecules and study their fragmentation after excitation of core electrons. The experiments are carried out at the storage rings Soleil (St. Aubin/F) with Christian Alcaraz and Swiss Light Source  (SLS, Paul-Scherrer-Institut/CH) with Patrick Hemberger and Andras Boedi.  At both facilities beamlines designated for the VUV range are available. Members of our group typically travel for one week to one of the facilities and collect data.

    The project is financially supported by the "Deutsche Forschungsgemeinschaft".

    Coworker: Engelbert Reusch, Domenik Schleier

    Selected Publication:

    D. P. Mukhopadhyay, D. Schleier, I. Fischer, J.-C. Loison, C. Alcaraz and G. A. Garcia
    Photoelectron spectroscopy of boron-containing reactive intermediates using synchrotron radiation: BH2, BH, and BF
    Phys. Chem. Chem. Phys. 22, 1027 (2020)
    https://doi.org/10.1039/C9CP06010C

    D. Schleier, A. Humeniuk, E. Reusch, F. Holzmeier, D. Nunez-Reyes, C. Alcaraz, G. A. Garcia, J.-C. Loison, I. Fischer, R. Mitric
    Diborene: Generation and Photoelectron Spectroscopy of an Inorganic Biradical
    J. Phys. Chem. Lett. 9, 5921 (2018)
    https://doi.org/10.1021/acs.jpclett.8b02338

    F. Holzmeier, T. J. A. Wolf, C. Gienger, I. Wagner, J. Bozek, S. Nandi, C. Nicolas, I. Fischer, M. Gühr, and R. F. Fink
    Normal and resonant Auger spectroscopy of isocyanic acid, HNCO
    J. Chem. Phys. 149, 034308 (2018)
    https://doi.org/10.1063/1.5030621

    D. Schleier, P. Constantinidis, N. Fassheber, I. Fischer, G. Friedrichs, P. Hemberger, E. Reusch, B. Sztaray, and K. Voronova
    Kinetics of the a-C3H5 + O2 reaction, investigated by photoionization using synchrotron radiation
    Phys. Chem. Chem. Phys. 20, 10721 (2018)
    https://doi.org/10.1039/C7CP07893E

    E. Reusch, F. Holzmeier, P. Constantinidis, P. Hemberger, I. Fischer
    Isomer-Selective Generation and Spectroscopic Characterization of Picolyl Radicals
    Angew. Chemie Int. Ed. 56, 8000 (2017)
    https://doi.org/10.1002/anie.201703433

    F. Holzmeier, I. Fischer, B. Kiendl, A. Krueger, A. Bodi, Patrick Hemberger
    On the absolute photoionization cross section and dissociative photoionization of cyclopropenylidene
    Phys. Chem. Chem. Phys. 18, 9240 (2016)
    http://pubs.rsc.org/en/Content/ArticleLanding/2016/CP/c6cp01068g