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Isotope effects on vibronic coupling of pyrazine

โœ 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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๐Ÿ“œ SIMILAR VOLUMES


Vibronic coupling and Raman intensities
โœ M. Ito; I. Suzuka; Y. Udagawa; N. Mikami; K. Kaya ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 233 KB

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

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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.

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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.

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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