M. Delzoppo et al., A RELATIONSHIP BETWEEN RAMAN AND INFRARED-SPECTRA - THE CASE OF PUSH-PULL MOLECULES, Chemical physics letters, 287(1-2), 1998, pp. 100-108
Vibrational spectra of push-pull polyenes show a peculiar feature name
ly, in infrared and Raman spectra strong, coincident bands appear, ari
sing from vibrations localised on the polyene bridge. A simple model,
based on the introduction of an effective internal field due to the ch
arge transfer between end groups allows the infrared and Raman intensi
ties of these bands to be related. (C) 1998 Elsevier Science B.V. All
rights reserved.