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Vol. 37 No. 5 (2025): Vol 37 Issue 5, 2025

Copyright (c) 2025 J SANTHAN KUMAR, Dr. N Rajya Lakshmi, Dr. K.Neeraja, Dr. T. Anjana Devi, Dr. D. TIRUPATHI SWAMY, Mr. SHAIK AZAD BASHA, Prof. Sandhya Cole

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Spectroscopic and Optical Studies of Molybdenum Ions in CdO-SrO-B2O3-SiO2 (CdSBSi) Glass System

https://doi.org/10.14233/ajchem.2025.33684
J. Santhan Kumar
Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur-522510, India
https://orcid.org/0000-0001-8188-145X
N. Rajya Lakshmi
Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur-522510, India; Department of General Section, Government Polytechnic College, Repalle-522265, India
https://orcid.org/0000-0002-6513-147X
K. Neeraja
Department of Physics, Narasaraopet Engineering College, Narasaraopeta-522601, India
https://orcid.org/0000-0002-8474-1249
T. Anjana Devi
Department of General Section, D.S.R. Government Polytechnic College, Ponnuru-522124, India
https://orcid.org/0009-0003-5305-4862
D. Tirupathi Swamy
Department of General Section, Government Polytechnic for Women, Guntur-522006, India
https://orcid.org/0000-0003-4007-3784
Shaik Azad Basha
Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur-522510, India
https://orcid.org/0000-0001-8132-8486
Sandhya Cole
Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur-522510, India
https://orcid.org/0000-0002-1827-2149

Corresponding Author(s) : J. Santhan Kumar

santhanj007@gmail.com

Asian Journal of Chemistry, Vol. 37 No. 5 (2025): Vol 37 Issue 5, 2025

Abstract

In this work, the electron paramagnetic resonance (EPR) and optical absorption investigations at room temperature have been conducted on MoO3-CdO-SrO-B2O3-SiO2 glasses by altering percentages of SrO and MoO3. The distinctive EPR spectra of Mo5+ appeared at centered around g ~ 2.00 and are attributed to the Mo5+ ion within an axially distorted octahedral coordination sphere. Red shift was observed near an absorption edge in the UV spectra. The fundamental UV edges of absorption of the glasses were used to evaluate the Urbach energies and optical band gaps for transitions which occur directly or indirectly. A theoretical evaluation of glasses’ optical basicity (Λth) has been conducted. The interaction between oxygen ligands and Mo5+ ions has been demonstrated to be improved. The covalent-to-ionic ratios of the glass can be classified using optical basicity, since a higher optical basicity indicates a lower degree of covalence.

Keywords

EPR Molybdenum ion Optical absorption FT-IR Borosilicate glass Powder XRD
(1)
Kumar, J. S.; Lakshmi, N. R.; Neeraja, K.; Devi, T. A.; Swamy, D. T.; Basha, S. A.; Cole, S. Spectroscopic and Optical Studies of Molybdenum Ions in CdO-SrO-B2O3-SiO2 (CdSBSi) Glass System. ajc 2025, 37, 1204-1210.
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