Journal of Physical Chemistry A, Vol.112, No.51, 13463-13469, 2008
Vibrational Signature of the Conformers in Tyramine Studied by IR Dip and Dispersed Fluorescence Spectroscopies
Dispersed fluorescence and IR dip spectra of seven conformers of tyramine were measured in a supersonic jet. Observed vibrational bands are assigned based on quantum chemical calculations. The vibrational frequency of out-of-plane CH bending in the benzene ring shows characteristic shifts according to the conformation of C-beta-C-alpha, while that of CH stretching in the methylene chain reflects the conformation of N-C-beta. From these vibrational frequencies, assignments of the conformers observed in the S-1-S-0 laser induced fluorescence spectrum are discussed.