IR Spectra and dipole moment function of the H2S molecule in the gas and liquid phases

Sh Sh Nabiev, L. A. Palkina, V. I. Starikov

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The IR spectra of H2S molecules in the gas and liquid phases and in solutions of liquefied noble gases are experimentally studied over a wide range of frequencies, including the regions of second- and third-order transitions. Based on experimental data on the parameters of the effective dipole moment, the first, second, and third derivatives of the dipole moment of the H2S molecule with respect to the normal coordinates are recovered. The values of the first derivatives with respect to the coordinates associated with the stretching vibration are abnormally small in comparison with the higher-order derivatives. The change in the dipole moment of the molecule H2S under the influence of the intermolecular forces on gas-liquid transition is examined. The observed anomalously large (more than 200-fold) increase in the absolute intensity of the fundamental stretching vibration band νstr cannot be accounted for by abnormally strong intermolecular interaction forces. The increase in the absolute intensity of the νstr band is associated with abnormally small first derivatives of the dipole moment of the gas-phase molecule. The effect of the intermolecular forces on the dipole moment is compared to that for the H2O molecule.

    Original languageEnglish
    Pages (from-to)721-733
    Number of pages13
    JournalRussian Journal of Physical Chemistry B
    Volume7
    Issue number6
    DOIs
    Publication statusPublished - Nov 2013

    Keywords

    • absorption coefficients
    • aerosol-gas anomalies
    • cryosolution
    • dipole moment derivatives
    • hydrogen sulfide
    • IR spectrum
    • remote monitoring
    • vibrational anharmonicity

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry

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