Azulene resonance Raman

A case study resonance Raman scattering and fluorescence from Azulene in a Naphthalene matrix... 

Figure 13. Absorption and resonance Raman profiles for azulene in CS2 at 300 K 44 The solid lines are theoretical curves computed using a seven-mode stochastic harmonic model without Dushinsky rotation (Table I). The absorption curve (upper panel) is co

Interference phenomena are also evident in the resonance Raman spectra of azulene (Liang et aU 1976,1978). The absorption spectrum of this molecule in solution is characterized by overlapping bands belonging to at least three totally symmetric progressions. As a result, the excitation profile of a given mode shows maxima due to other modes. No quantitative analysis is available to indicate whether vibronic coupling and normal coordinate rotation contribute substantially to the observed profiles whose main features reflect the Franck-Condon principle. 

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