The IR reflectance spectra of the nu 3(SO4(2-)) and nu 4(SO4(2-)) band regions of some Tutton salts using polarized radiation: testing the model dielectric function

Vladimir Ivanovski; Vladimir M Petrusevski; Marta K Gunde

doi:10.1016/j.saa.2004.03.034

The IR reflectance spectra of the nu 3(SO4(2-)) and nu 4(SO4(2-)) band regions of some Tutton salts using polarized radiation: testing the model dielectric function

Spectrochim Acta A Mol Biomol Spectrosc. 2005 Jan 1;61(1-2):67-76. doi: 10.1016/j.saa.2004.03.034.

Authors

Vladimir Ivanovski¹, Vladimir M Petrusevski, Marta K Gunde

Affiliation

¹ Institute of Chemistry, Faculty of Science, Sts. Cyril and Methodius University, Arhimedova 5, P.O. Box 162, 1000 Skopje, Macedonia. vladimir@iunona.pmf.ukim.edu.mk

PMID: 15556423
DOI: 10.1016/j.saa.2004.03.034

Abstract

The investigation of the vibrational bands of the SO(4)(2-) ions (in the nu(3) and nu(4) frequency regions) of six different Tutton salts was performed with specular IR reflectance spectroscopy using polarized radiation, on single crystal samples. The reflectance function under oblique incidence using dielectric model function as parameter (originally derived for optically uniaxial crystals) appeared to be readily applicable for the investigated monoclinic crystals. The frequencies of the transversal and longitudinal phonons were obtained by fitting of spectra recorded from (0 1 0), (0 0 1) and (1 0 0) crystal planes. Further, the symmetry types of all experimentally detected phonons were identified. Some of the results were further confirmed from IR absorption spectra recorded at liquid nitrogen temperature (LNT) of isomorphously isolated SO(4)(2-) ions into the corresponding selenate matrices.

MeSH terms

Electrons
Ions / chemistry*
Models, Chemical
Quaternary Ammonium Compounds / chemistry
Salts / chemistry*
Spectrophotometry, Infrared
Sulfonic Acids / chemistry*

Substances

Ions
Quaternary Ammonium Compounds
Salts
Sulfonic Acids