BMOLogo
Publications

LMU München
Fakultät für Physik


Home

General
Research
Funding
Members
Publications
  All Publications
  PhD Theses
  Master Theses
  Search
  i Search
Lectures/Seminars
Conferences
Vacancies
Search

Internal




Impressum
(c) 2002 BMO

"Ultrafast proton transfer of 1-hydroxy-2-acetonaphthone: Reaction path from resonance Raman and transient absorption studies"
S. Lochbrunner, A. Szeghalmi, K. Stock, and M. Schmitt
J. Chem. Phys. 122, 244315 (2005)


Abstract:
The intramolecular degrees of freedom contributing to the ultrafast excited state intramolecu-lar proton transfer of 1-hydroxy-2-acetonaphthone are determined. Thereto resonance Raman studies are combined with transient absorption measurements with 30 fs time resolution. En-hanced Raman intensity is found in coordinates that are dominantly associated with deforma-tions and bond length changes in the naphthalene chromophore. This indicates that the primary changes after the optical excitation are a geometric relaxation of the chromophore. A ringing of the molecule after the ultrafast proton transfer is observed by the transient absorption measurements. It reveals the nuclear coordinates contributing to the reaction path beyond the Franck-Condon region. There, planar H-chelate ring deformations changing the donor acceptor distance are found to dominate. The difference in the observed vibrational signatures indicates a significant turn in the reaction path.

BMO authors (in alphabetic order):
Stefan Lochbrunner


mailto: webmaster
Letzte Änderung: 2016-09-14 13:34