Manifestation of Fermi resonance in Raman spectra of micellar aqueous solutions of sodium octanoateстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 16 сентября 2020 г.
Аннотация:The paper presents the results of an experimental study of the role of the Fermi resonance (FR) between theovertone of the bending and symmetric valence vibrations of the water molecule in micellar solutions of sodiumoctanoate in the mechanisms of formation of the water valence band. The analysis of broad spectral bands was carriedout using genetic algorithms and gradient methods. The frequency detuning between the components of the Fermidoublet for all the samples were obtained at room temperature. For aqueous solutions of sodium octanoate in the criticalconcentration of micelle formation (0.4 M) frequency detuning ceases to decrease with the growth of surfactantconcentration, which is explained by the strengthening of the network of hydrogen bonds in the solution in the process ofcombining monomers and dimers of surfactants in multimolecular aggregates - micelles. A significant contribution of theFermi resonance to the intensity of the valence band of water in sodium octanoate solutions was demonstrated. The FRinteraction constants were calculated