TY - JOUR
T1 - Fluorescence excitation spectra of indole, 3-methyl indole, and 3-indole acetic acid in supersonic jets
AU - Bersohn, Richard
AU - Even, Uzi
AU - Jortner, Joshua
PY - 1983
Y1 - 1983
N2 - In this paper we report on the laser-induced fluorescence spectra of indole, 3-methyl indole, and 3-indole acetic acid in pulsed supersonic expansions of He. The electronic origin of the first excited (1L b) state is 35 233 cm-1 for indole, 34 887 cm-1 for 3-methyl indole, and 34 044 cm-1 for 3-indole acetic acid. On the basis of the energetics and fluorescence lifetimes, the spectral features at excess vibrational energies Eν=0-2200 cm-1 for indole and Eν=0-1600 cm-1 for 3-methyl indole were assigned to the vibrational level structure within a single electronic manifold. The second electronically excited (1La) state is not located in the above energy ranges. The energetics of selective solvation of 3-methyl indole was inferred from the spectra of the van der Waals complexes with Ar, H 2O, and D2O, which provide information on microscopic solvent shifts of the electronic origin and of some prominent vibrational excitations of the 1Lb states.
AB - In this paper we report on the laser-induced fluorescence spectra of indole, 3-methyl indole, and 3-indole acetic acid in pulsed supersonic expansions of He. The electronic origin of the first excited (1L b) state is 35 233 cm-1 for indole, 34 887 cm-1 for 3-methyl indole, and 34 044 cm-1 for 3-indole acetic acid. On the basis of the energetics and fluorescence lifetimes, the spectral features at excess vibrational energies Eν=0-2200 cm-1 for indole and Eν=0-1600 cm-1 for 3-methyl indole were assigned to the vibrational level structure within a single electronic manifold. The second electronically excited (1La) state is not located in the above energy ranges. The energetics of selective solvation of 3-methyl indole was inferred from the spectra of the van der Waals complexes with Ar, H 2O, and D2O, which provide information on microscopic solvent shifts of the electronic origin and of some prominent vibrational excitations of the 1Lb states.
UR - http://www.scopus.com/inward/record.url?scp=36549097611&partnerID=8YFLogxK
U2 - 10.1063/1.446832
DO - 10.1063/1.446832
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AN - SCOPUS:36549097611
SN - 0021-9606
VL - 80
SP - 1050
EP - 1058
JO - The Journal of Chemical Physics
JF - The Journal of Chemical Physics
IS - 3
ER -