%0 Journal Article
%A Colaizzi, Lorenzo
%A Riabchuk, Sergei
%A Maansson, Erik
%A Saraswathula, Krishna
%A Wanie, Vincent
%A Trabattoni, Andrea
%A Gonzalez Vazquez, Jesus
%A Martin, Fernando
%A Calegari, Francesca
%T Few-femtosecond time-resolved study of the UV-induced dissociative dynamics of iodomethane
%J Nature Communications
%V 15
%N 1
%@ 2041-1723
%C [London]
%I Nature Publishing Group UK
%M PUBDB-2024-00541
%P 9196
%D 2024
%Z PIF-2021-03
%X We present a combined experimental and theoretical investigation of the dissociative dynamics of iodomethane following ultraviolet (UV) photoexcitation. Wedo so by using a UV pump – near-infrared (NIR) probe scheme with an unprecedented time resolution. The short duration of the UV pulse (4.2 fs) allows the ultrafast dynamics to be investigated in the absence of any external field, from well before any significant vibrational displacement occurs until dissociation has taken place. The experimental results are used to benchmark semi-classical wave packet trajectory calculations. In agreement with the experiment, the model accurately identifies the main dissociation channels and further reveals a clear signature of the conical intersection in the time-dependent yield of the iodine ion. Further, we demonstrate that the UV-induced breakage of the C-I bond can be prevented when the molecule is ionized by the probe pulse within 5 fs after UV light excitation, showcasing an ultrafast stabilization scheme against dissociation.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:39455555
%U <Go to ISI:>//WOS:001342240600025
%R 10.1038/s41467-024-53183-8
%U https://bib-pubdb1.desy.de/record/602233