Excited-State Dynamics during Primary C-I Homolysis in Acetyl Iodide Revealed by Ultrafast Core-Level Spectroscopy.

ABSTRACT: In typical carbonyl-containing molecules, bond dissociation events follow initial excitation to nπ_C═O^* states. However, in acetyl iodide, the iodine atom gives rise to electronic states with mixed nπ_C═O^* and nσ_C-I^* character, leading to complex excited-state dynamics, ultimately resulting in dissociation. Using ultrafast extreme ultraviolet (XUV) transient absorption spectroscopy and quantum chemical calculations, we present an investigation of the primary photodissociation dynamics of acetyl iodide via time-resolved spectroscopy of core-to-valence transitions of the I atom after 266 nm excitation. The probed I 4d-to-valence transitions show features that evolve on sub-100-fs time scales, reporting on ex

SUBMITTER: Troß J 

PROVIDER: S-EPMC10710897 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature