English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Fluorescence excitation of isolated, jet-cooled 3-hydroxyflavone: The rate of excited state intramolecular proton transfer from homogeneous linewidths.

MPS-Authors
/persons/resource/persons15043

Ernsting,  N. P.
Abteilung Laserphysik, MPI for biophysical chemistry, Max Planck Society;

/persons/resource/persons14982

Dick,  B.
Abteilung Laserphysik, MPI for biophysical chemistry, Max Planck Society;

External Resource
No external resources are shared
Fulltext (public)

2378152.pdf
(Publisher version), 537KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Ernsting, N. P., & Dick, B. (1989). Fluorescence excitation of isolated, jet-cooled 3-hydroxyflavone: The rate of excited state intramolecular proton transfer from homogeneous linewidths. Chemical Physics, 136(2), 181-186. doi:10.1016/0301-0104(89)80045-X.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-2E7C-F
Abstract
The laser-induced fluorescence excitation of 3-hydroxyflavone, cooled by seeding in a supersonic expansion of He, has been investigated in the wavenumber range 28000–28500 cm−1. The vibronic origin of the S0-S1 (ππ*) electronic transition of the unperturbed normal molecular form was found at 28080.3 cm−1 (3560.21 Å). The excitation spectrum is characterised by several progressions with vibrational spacing of 45 cm−1, and by severe spectral congestion at excess vibrational energy above 225 cm−1. The prominent vibronic bands are best represented by Lorentzian lineshapes. They are homogeneously broadened with widths (deconvoluted fwhm) varying from 4.1 to 2.6 cm−1. The corresponding vibronic lifetimes, in the range 1.3–2.0 ps, are short because of excited-state intramolecular proton transfer.