Transient isomers in the photodissociation of bromoiodomethane
Artikel i vetenskaplig tidskrift, 2018
The photochemistry of halomethanes is fascinating for the complex cascade reactions toward either the parent or newly synthesized molecules. Here, we address the structural rearrangement of photodissociated CH2IBr in methanol and cyclohexane, probed by time-resolved X-ray scattering in liquid solution. Upon selective laser cleavage of the C-I bond, we follow the reaction cascade of the two geminate geometrical isomers, CH2I-Br and CH2Br-I. Both meta-stable isomers decay on different time scales, mediated by solvent interaction, toward the original parent molecule. We observe the internal rearrangement of CH2Br-I to CH2I-Br in cyclohexane by extending the time window up to 3 mu s. We track the photoproduct kinetics of CH2Br-I in methanol solution where only one isomer is observed. The effect of the polarity of solvent on the geminate recombination pathways is discussed. Published by AIP Publishing.
Författare
Moreno Marcellini
Uppsala universitet
Université Bourgogne Franche-Comté
Centre national de la recherche scientifique (CNRS)
Alexandr Nasedkin
Chalmers, Fysik, Biologisk fysik
Burkhard Zietz
Uppsala universitet
Jonas Petersson
Uppsala universitet
Jonathan Vincent
Uppsala universitet
Federico Palazzetti
Universita degli Studi di Perugia
Erik Malmerberg
Göteborgs universitet
Qingyu Kong
European Synchrotron Radiation Facility (ESRF)
Argonne National Laboratory
Michael Wulff
European Synchrotron Radiation Facility (ESRF)
David van der Spoel
Uppsala universitet
Richard Neutze
Göteborgs universitet
Jan Davidsson
Uppsala universitet
Journal of Chemical Physics
0021-9606 (ISSN) 1089-7690 (eISSN)
Vol. 148 13 134307Ämneskategorier
Fysikalisk kemi
Atom- och molekylfysik och optik
Organisk kemi
DOI
10.1063/1.5005595
PubMed
29626862