Ultrafast Mapping of Electronic and Nuclear Structure in the Photo Dissociation of Nitrogen Dioxide.

ABSTRACT: We investigate the photoinduced dissociation reaction of NO₂ → NO + O upon electronic excitation of the X̃²A₁ (D₀) to the òB₂ (D₁) state by femtosecond X-ray absorption spectroscopy at the nitrogen K-edge. We obtain key insight into the chemical bond breaking event and its associated electronic structural dynamics. Calculations of the photoinduced reaction allow to assign the transient absorption features at time scales of 10-50 fs to wave packet motions in the excited D₁ and ground D₀ states, followed by the formation of the NO photoproduct with a 255 ± 23 fs time constant. Our analysis shows that there is no direct correlation between the 1s core levels and the electronic ground and excite

SUBMITTER: Zhang ZY 

PROVIDER: S-EPMC11626503 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature