Observing the Structural Evolution in the Photodissociation of Diiodomethane with Femtosecond Solution X-Ray Scattering.
Journal
Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141
Informations de publication
Date de publication:
27 Nov 2020
27 Nov 2020
Historique:
received:
19
08
2020
revised:
25
09
2020
accepted:
19
10
2020
entrez:
14
12
2020
pubmed:
15
12
2020
medline:
15
12
2020
Statut:
ppublish
Résumé
Resolving the structural dynamics of the initial steps of chemical reactions is challenging. We report the femtosecond time-resolved wide-angle x-ray scattering of the photodissociation of diiodomethane in cyclohexane. The data reveal with structural detail how the molecule dissociates into radicals, how the radicals collide with the solvent, and how they form the photoisomer. We extract how translational and rotational kinetic energy is dispersed into the solvent. We also find that 85% of the primary radical pairs are confined to their original solvent cage and discuss how this influences the downstream recombination reactions.
Identifiants
pubmed: 33315438
doi: 10.1103/PhysRevLett.125.226001
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM