某些镍（II）硫代氨基脲配合物的光谱、热学和电化学研究。
Spectroscopic, thermal and electrochemical studies on some nickel(II) thiosemicarbazone complexes.
作者信息
El-Shazly R M, Al-Hazmi G A A, Ghazy S E, El-Shahawi M S, El-Asmy A A
机构信息
Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2005 Jan 1;61(1-2):243-52. doi: 10.1016/j.saa.2004.02.035.
Several complexes of thiosemicarbazone derivatives with Ni(II) have been prepared. Structural investigation of the ligands and their complexes has been made based on elemental analysis, magnetic moment, spectral (UV-Vis, i.r., (1)H NMR, ms), and thermal studies. The i.r. spectra suggest the bidentate mononegative and tridentate (neutral, mono-, and binegative) behavior of the ligands. Different stereochemistries were suggested for the isolated complexes. The thermogravimetry (TG) and derivative thermogravimetry (DTG) have been used to study the thermal decomposition and kinetic parameters of some ligands and complexes using the Coats-Redfern and Horowitz-Metzger equations. The redox properties and stability of the complexes toward oxidation waves explored by cyclic voltammetry are related to the electron withdrawing or releasing ability of the substituent of thiosemicarbazone moiety. The samples displayed Ni(II)/Ni(I) couples irreversible waves associated with Ni(III)/Ni(II) process.
已制备了几种硫代半卡巴腙衍生物与镍（II）的配合物。基于元素分析、磁矩、光谱（紫外可见光谱、红外光谱、核磁共振氢谱、质谱）和热学研究，对配体及其配合物进行了结构研究。红外光谱表明配体具有双齿单负离子和三齿（中性、单负离子和双负离子）行为。对于分离出的配合物提出了不同的立体化学结构。热重分析（TG）和微商热重分析（DTG）已用于使用Coats-Redfern和Horowitz-Metzger方程研究一些配体和配合物的热分解及动力学参数。通过循环伏安法探索的配合物的氧化还原性质和对氧化波的稳定性与硫代半卡巴腙部分取代基的吸电子或供电子能力有关。样品显示出与Ni（III）/Ni（II）过程相关的Ni（II）/Ni（I）偶不可逆波。
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