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Oriented solids as a colloid suspension in nematic liquid crystal – New tool for IR-spectroscopic and structural elucidation of inorganic compounds and glasses |
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| Authors: | Ts Kolev BB Koleva B Schivachev |
| Institution: | a Plovdiv University, Department of Organic Chemistry, 24 Tzar Assen Street, Plovdiv 4000, Bulgaria b Institute of Organic Chemistry, Bulgarian Academy of Sciences, Academician G. Bonchev Street Building 9, 1113 Sofia, Bulgaria c Sofia University “St. Kl. Ohridsky”, Faculty of Chemistry, Department of Analytical Chemistry, 1164 Sofia, Bulgaria d Bulgarian Academy of Sciences, Central Laboratory of Mineralogy and Crystallography, Academician G. Bonchev Street Building 107, 1113 Sofia, Bulgaria |
| Abstract: | Possibilities of the linear-polarized infrared (IR-LD) spectroscopy of oriented colloid suspensions in nematic liquid crystals, for structural and local structural elucidation for first time are demonstrated of inorganic compounds and glasses. The advantages of the method for tellurite and borate glasses are shown. The IR-band assignment of the typical local structural units in the glasses are proposed by a comparison with the IR-characteristics of appropriate crystalline analogues as α-TeO2, V2O5, MoO3 · H2O and its high temperature form. The IR-spectroscopic characteristics of BO3, BO4 and boroxol ring are elucidated, using crystalline β-BaB2O4, SrB4O7, H3BO3 and B2O3 as model systems, where the structural moieties have been refined by single crystal X-ray diffraction. |
| Keywords: | IR-LD spectroscopy Colloid suspension Structural elucidation α -TeO2 V2O5 MoO3 · H2O β -BaB2O4 SrB4O7 H3BO3 and B2O3 Tellurite and borate glasses Solid state |
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