Department of Chemistry, Yasouj University, Yasouj, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Nov;82(1):44-8. doi: 10.1016/j.saa.2011.06.058. Epub 2011 Jul 12.
The VO(IV) complexes of tridentate ONO Schiff ligands were synthesised and characterized by IR, UV-vis and elemental analysis. The electrochemical properties of the vanadyl complexes were investigated by cyclic voltammetry. A good correlation was observed between the oxidation potentials and the electron withdrawing character of the substituents on the Schiff base ligands, showing the following trend: MeO<H<Br<NO(2) and H<Cl. The thermogravimetry (TG) and differential thermoanalysis (DTA) of the VO(IV) complexes were carried out in the range of 20-700°C. The VOL(1)(OH(2)) decomposed in two steps whereas the remaining six complexes decomposed in three steps. The thermal decomposition of these complexes is closely related to the nature of the Schiff base ligands and proceeds via first order kinetics.
三齿 ONO 希夫配体的 VO(IV) 配合物通过红外光谱、紫外可见光谱和元素分析进行了合成和表征。通过循环伏安法研究了钒氧配合物的电化学性质。观察到氧化电位与席夫碱配体上取代基的吸电子性质之间存在良好的相关性，呈现出以下趋势：MeO<H<Br<NO(2)<Cl。VO(IV) 配合物的热重 (TG) 和差示热分析 (DTA) 在 20-700°C 范围内进行。VOL(1)(OH(2)) 分两步分解，而其余六个配合物分三步分解。这些配合物的热分解与席夫碱配体的性质密切相关，并且通过一级动力学进行。
