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   electrochemistry, thermalanalysis, and theoretical study of vanadyl schiff base complexes  
   
نویسنده kianfar a.h. ,mohamadi malek abadi h. ,hashemi fath r. ,roushani m.
منبع inorganic chemistry research - 2016 - دوره : 1 - شماره : 1 - صفحه:9 -20
چکیده    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.
کلیدواژه vanadyl complexes ,tridentate schiff base ligands ,schiff base complexes ,thermogravimetry ,electrochemistry ,ab initio calculations
آدرس 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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