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Vol. 31 No. 7 (2019): Vol 31 Issue 7

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Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques

https://doi.org/10.14233/ajchem.2019.21961
Rajesh Kumar Sharma
Department of Chemistry, Kanchi Mamunivar Centre for Post Graduate Studies, Pondicherry-605008, India
V. Ilamathi
Department of Chemistry, Kanchi Mamunivar Centre for Post Graduate Studies, Pondicherry-605008, India

Corresponding Author(s) : Rajesh Kumar Sharma

rksepr@gmail.com

Asian Journal of Chemistry, Vol. 31 No. 7 (2019): Vol 31 Issue 7

Abstract

Preparation of glasses of xV2O5-(100-x) B2O3 (21 ≤ x ≤ 41) system for x = 21, 31, 41 mol % have been performed using sol-gel process and studied by employing XRD, FT-IR, EPR and UV-visible techniques. The glassy phase was established by powder XRD patterns. Fourier transform infrared red studies of the amorphous samples revealed the appearance of triangular [BO3/2] and tetrahedral [BO4/2] and V = O units. X-band powder EPR studies exhibit partially resolved isotropic lines at 300 K and well resolved hyperfine structure having a 16 line features (8 parallel lines and 8 perpendicular lines) at 77 K. The assignment of EPR parameters, gxx = gyy = g⊥ > gzz = g|| and Azz = A|| > Axx = Ayy = A⊥ is consistent with ground state 2B2 which confirms that the tetravalent vanadium (3d1) exists in the glass matrix as vanadyl ion in tetragonally distorted compressed octahedral symmetry having C4v symmetry. UV-visible absorption spectra of glasses exhibit characteristic two ligand field d-d bands in the tetragonal fields of VO2+ ions. Using EPR parameters and UV-visible data, various molecular orbital bonding parameters were ascertained.

Keywords

Vanadium pentoxide Boric acid Glass matrix Bonding coefficients
Sharma, R. K., & Ilamathi, V. (2019). Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques. Asian Journal of Chemistry, 31(7), 1527–1531. https://doi.org/10.14233/ajchem.2019.21961
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