The fluorescence spectrum of pyrnzine vapour and the Raman spectra of liquid pyrazine excited at various wavelengths were observed. The appearance of the ion\_: progression of the hydrogen bending vibration y5 (b, $ in the fluorescence spectrum and a remarkable prcrcsonancc: effect of the Raman lint
Isotope effects on vibronic coupling of pyrazine
โ Scribed by Keiji Kamogawa; Mitsuo Ito
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 815 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0022-2852
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๐ SIMILAR VOLUMES
Siie vibronic Ieve fb~orescence spectra of pyrazine4t~ and 44 are reported and the intensity distriiutions of tile Ione btg mode in these spectra are analyzed in terms of a vibronic coupling model.
The excitation wavelength dependences of theintensities of the Raman lines of pyrkne ha-de been measured The intensity enhancement of the non-totally symmetric Ramnn line nt 925 cm-' provided firm evidence of the dbronic coupling between the lowest lBju(n,sr\*) and second lowest 1B2u(fi,~\*) states.
The isotope effect on the vibronic spectrum of naphthalene has been investigated under conditions of h&h resolution, enabling the resolution of individual vibronic states Comparing the isotope effect for fixed vibronic states [cads to an U-Iexpected smoothing which is taken as evidence fdr a triplet