Raman scattering from the peroxide ion in Cs2O2

Authors

  • Tsachi Livneh,

    Corresponding author
    1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
    Current affiliation:
    1. Department of Physical Chemistry, Nuclear Research Center–Negev, P.O.B. 9001, Beer Sheva 84190, Israel.
    • Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
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  • Alisa Band,

    1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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  • Reshef Tenne

    1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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Abstract

The Raman spectrum of Cs2O2 excited at 632.8 nm shows a single O2−2 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 ωe = 759.5 ± 0.7 cm−1 and anharmonicity constant ωexe = 8.4 ± 0.3 cm−1 were calculated directly from the measurements. These results are compared with ωe = 1151.0 ± 1.5 cm−1 and ωexe = 9.6 ± 0.5 cm−1 recently found for O2 ion in CsO2 by others. The lower ωexe of O2−2 relative to that of O2 indicates a broader (smaller curvature) anharmonic oscillator potential well. Copyright © 2002 John Wiley & Sons, Ltd.

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