| | 1 | Author
| G. Brolo, DonaldE. Irish | Requires cookie* | | | Title
| Alexandre  | | | | Abstract
| Dedicated to Prof. Hitoshi Ohtaki on the occasion of his 60th birthday Raman spectra of aqueous pyrazine have been investigated in acidic media: HCl from pH = 4 up to 11 M; HC104 from 0.1 M to 12 M; H2S04 form 0.1 M to 18 M. From observation of the shifts of the bands from neutral solutions, it has been possible to identify bands uniquely characteristic of unprotonated pyrazine and its two protonated forms. The diprotonated form was only observed for high concentrations of HC104 and H2S04. From bandfitting of the spectral contours it has been possible to construct the species distribution diagram and estimate the pK values. Raman bands of the three species have been identified and assigned. The results are used to explain an unassigned band at 1235 cm-1, reported by several authors, in SERS from pyrazine on silver and gold elec trodes. R a m a n S p e c tr a l S tu d ie s o f A q u e o u s A c id ic P y r a z in e S o lu tio n s | | | |
Reference
| Z. Naturforsch. 50a, 274—282 (1995); received October 31 1994 | | | |
Published
| 1995 | | | |
Keywords
| Pyrazine, Pyrazinium, SERS, Raman spectroscopy | | | |
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