Electrochemistry, Thermal analysis, and Theoretical Study of Vanadyl Schiff Base Complexes

Authors

  • Dr. Amisha Sinha   M.Sc., Ph.D. , Chemistry, B.R.A. Bihar University, Muzaffarpur, Bihar, India

Keywords:

Hemiparalysis, Molecular Geometry, Trigonal Bipyramidal, Thermogravimetry

Abstract

The VO(IV) complexes of tridentate ONO Schiff base ligands derived from 2- aminobenzoic acid and salicylaldehyde derivatives were synthesized and characterized by IR, UV–Vis and elemental analysis. Electrochemical properties of the vanadyl complexes were investigated by cyclic voltammetry. A good linear correlation was observed between the oxidation potentials and the electron-withdrawing character of the substituents on the Schiff bases, showed the following trend: Me O < H < Br < NO2. The thermogravimetry (TG) and differential hemiparalysis (DTA) of the synthesized complexes were carried out in the range of 20–700 °C. All of the complexes decomposed in three steps. The thermal decomposition pathways were closely related to the nature of the Schiff base ligands and preceded via ?rst-order kinetics. The structures of compounds were determined by ab initio calculations. The optimized molecular geometry was calculated at the B3LYP/6-31G(d) level. The results suggested that, in the complexes, V(IV) ion was in square-pyramid or TBP (trigonal bipyramidal) NO4 coordination geometry. Also, the bond lengths and angles were studied and compared.

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International Journal of Scientific Research in Chemistry

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Published

2020-02-27

Issue

Volume 5, Issue 1, January-February-2020

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
Dr. Amisha Sinha , " Electrochemistry, Thermal analysis, and Theoretical Study of Vanadyl Schiff Base Complexes, International Journal of Scientific Research in Chemistry(IJSRCH), ISSN : 2456-8457, Volume 5, Issue 1, pp.42-44, January-February-2020.