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

Universite Bourgogne Franche-Comte

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 134307

Ämneskategorier

Fysikalisk kemi

Atom- och molekylfysik och optik

Organisk kemi

DOI

10.1063/1.5005595

PubMed

29626862