Unusual behavior in the first excited state lifetime of catechol
  We are presenting vibrationally selective pump-probe measurements of the first electronic excited-state (pp*) lifetime of jet-cooled neutral catechol (1,2-dihydroxybenzene). The lifetime of the 0-0 transition is very short (7 ps) as rationalized by the small pp*/psigma* gap calculated. However the lifetimes implying higher out-of-plane vibrational levels are longer (~11 ps). This emphasizes the role of the out-of-plane vibration in the pp*/psigma* coupling not only in its nature but also in the number of quanta 
Martin Weiler, Mitsuhiko Miyazaki, G\'eraldine F\'eraud (PIIM),   Shun-Ichi Ishiuchi, Claude Dedonder (PIIM), Christophe Jou...
physics.atm-clus physics.chem-ph