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Raman scattering from the peroxide ion in Cs 2 O 2
Author(s) -
Livneh Tsachi,
Band Alisa,
Tenne Reshef
Publication year - 2002
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.900
Subject(s) - anharmonicity , wavenumber , raman spectroscopy , raman scattering , ion , excited state , chemistry , analytical chemistry (journal) , peroxide , curvature , atomic physics , physics , optics , condensed matter physics , geometry , mathematics , organic chemistry , chromatography
The Raman spectrum of Cs 2 O 2 excited at 632.8 nm shows a single O 2 −2 fundamental band at wavenumber of 742.5 cm −1 and second and third overtones at 1468.5 and 2176.8 cm −1 , respectively. The harmonic wavenumber ω e = 759.5 ± 0.7 cm −1 and anharmonicity constant ω e x e = 8.4 ± 0.3 cm −1 were calculated directly from the measurements. These results are compared with ω e = 1151.0 ± 1.5 cm −1 and ω e x e = 9.6 ± 0.5 cm −1 recently found for O 2 − ion in CsO 2 by others. The lower ω e x e of O 2 −2 relative to that of O 2 − indicates a broader (smaller curvature) anharmonic oscillator potential well. Copyright © 2002 John Wiley & Sons, Ltd.