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electrochemistry, thermalanalysis, and theoretical study of vanadyl schiff base complexes
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نویسنده
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kianfar a.h. ,mohamadi malek abadi h. ,hashemi fath r. ,roushani m.
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منبع
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inorganic chemistry research - 2016 - دوره : 1 - شماره : 1 - صفحه:9 -20
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چکیده
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The vo(iv) complexes of tridentate ono schiff base ligands derived from 2-aminobenzoicacid 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: meo < h < br < no2. the thermogravimetry (tg) and differential thermoanalysis (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 first-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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کلیدواژه
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vanadyl complexes ,tridentate schiff base ligands ,schiff base complexes ,thermogravimetry ,electrochemistry ,ab initio calculations
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آدرس
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isfahan university of technology, department of chemistry, iran, yasouj university, department of chemistry, iran, yasouj university, department of chemistry, iran, ilam university, department of chemistry, iran
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Authors
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