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High pressure raman study of isotropic lineshapes of aqueous sodium nitrate solutions

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Abstract

The isotropic lineshape of the v1 (A1) stretching mode of the nitrate ion in solutions of sodium nitrate has been studied at 25°C as a function of NaNO3 concentration ranging from 0.1 to 6M. The pressure dependence has been determined for 1 and 6M solutions at pressures ranging from 1 bar to 3 kbar. The isotropic band becomes more asymmetric with increasing concentration, and its v1 peak frequency undergoes a blue shift both with increased concentration and increased pressure. At low concentration the vibrational correlation function is well described by the Kubo formula, whereas at higher concentration it becomes more Gaussian. The experimental data indicate that the v1 vibrational lineshape in aqueous solutions of NaNO3 is dominated by strong intermolecular interactions which produce inhomogeneous broadening at higher concentration.

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Author notes

  1. K. Baker

    Present address: Sharon Woods Technical Center, The Proctor and Gamble Company, 11530 Reed Hartman Highway, 45241, Cincinnati, OH

Authors and Affiliations

  1. Department of Chemistry, School of Chemical Sciences, University of Illinois, 61801, Urbana, Illinois

    K. Baker & J. Jonas

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Baker, K., Jonas, J. High pressure raman study of isotropic lineshapes of aqueous sodium nitrate solutions. J Solution Chem 16, 55–69 (1987). https://doi.org/10.1007/BF00647015

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  • DOI: https://doi.org/10.1007/BF00647015

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