Synthesis, spectral and thermal properties of some transition metal(II) complexes with a novel ligand derived from thiobarbituric acid
作者:Xiaoyi Li、Yiqun Wu、Donghong Gu、Fuxi Gan
DOI:10.1007/s10973-009-0290-2
日期:2009.11
absorption bands of the metal(II) complexes was researched. The thermal properties of the metal(II) complexes were investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC). Furthermore, the thermodynamic parameters, such as activation energy (E*), enthalpy (∆H*), entropy (∆S*) and free energy of the decomposition (∆G*) are calculated from the TG curves applying Coats–Redfern
四种新型金属(II)配合物Ni(L)2,Co(L)2,Cu(L)2和Zn(L)2(L = 5-(2-(1,5-二甲基-3-氧代) -2-苯基-2,3-二氢-1H-吡唑-4-基)azo] -1,3-二乙基-2-硫代-二氢嘧啶-4,6(1H,5H)-二酮)重氮化,偶合和金属化的过程。通过元素分析,1 H NMR,ESI-MS和FT-IR光谱鉴定其结构。研究了不同中心金属离子对金属配合物吸收带的影响。通过热重分析(TG)和差示扫描量热法(DSC)研究了金属(II)配合物的热性能。此外,热力学参数,例如活化能(E*),焓(∆ H *),熵(∆ S *)和分解的自由能(∆ G *)是根据Coats–Redfern方法从TG曲线计算得出的。结果表明,金属(II)配合物具有合适的电子吸收光谱,在约350-450 nm处具有蓝紫色光吸收,具有高的热稳定性和敏锐的热分解阈值。