Intersystem Crossing of 2-Methlypyrazine Studied by Femtosecond Photoelectron Imaging.
Molecules
; 27(19)2022 Sep 22.
Article
em En
| MEDLINE
| ID: mdl-36234780
ABSTRACT
2-methylpyrazine was excited to the high vibrational dynamics of the S1 state with 260 nm femtosecond laser light, and the evolution of the excited state was probed with 400 nm light. Because it was unstable, the S1 state decayed via intersystem crossing to the triplet state T1, and it may have decayed to the ground state S0 via internal conversion. S1-to-T1 intersystem crossing was observed by combining time-resolved mass spectrometry and time-resolved photoelectron spectroscopy. The crossover time scale was 23 ps. Rydberg states were identified, and the photoelectron spectral and angular distributions indicated accidental resonances of the S1 and T1 states with the 3s and 3p Rydberg states, respectively, during ionization.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Teoria Quântica
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Vibração
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article