Studies of Co(II), Ni(II), Cu(II) and Cd(II) chelates with different phosphonic acids
作者:B. Venkateswara Rao
DOI:10.1007/s10973-009-0512-7
日期:2010.5
Co(II), Ni(II), Cu(II) and Cd(II) chelates with 1-aminoethylidenediphosphonic acid (AEDP, H4L1), α-amino benzylidene diphosphonic acid (ABDP, H4L2), 1-amino-2-carboxyethane-1,1-diphosphonic acid (ACEDP, H5L3), 1,3-diaminopropane-1,1,3,3-tetraphosphonicacid (DAPTP, H8L4), ethylenediamine-N,N′-bis(dimethylmethylene phosphonic)acid (EDBDMPO, H4L5), O-phenylenediamine-N,N′-bis(dimethyl methylene phosphonic)acid (PDBDMPO, H4L6), diethylene triamine-N,N,N′,N′,N″N″-penta(methylene phosphonic)acid (DETAPMPO, H10L7) and diethylene triamine-N,N″-bis(dimethyl methylene phosphonic)acid (DETBDMPO, H4L8) have been synthesised and were characterised by elemental and thermal analyses as well as by IR, UV–VIS, EPR and magnetic measurements. The first stage in the thermal decomposition process of these complexes shows the presence of water of hydration, the second denotes the removal of the coordinated water molecules. After the loss of water molecules, the organic part starts decomposing. The final decomposition product has been found to be the respective MO·P2O5. The data of the investigated complexes suggest octahedral geometry with respect to Co(II) and Ni(II) and tetragonally distorted octahedral geometry with respect to Cu(II). Antiferromagnetism has been inferred from magnetic moment data. Infrared spectral studies have been carried out to determine coordination sites.
Co(II)、Ni(II)、Cu(II) 和 Cd(II) 与 1-氨基亚乙基二膦酸 (AEDP, H4L1)、α-氨基亚苄基二膦酸 (ABDP, H4L2)、1-氨基-2-羧基乙烷-1、1-二磷酸(ACEDP,H5L3)、1,3-二氨基丙烷-1,1,3,3-四磷酸(DAPTP,H8L4)、乙二胺-N,N′-双(二甲基亚甲基膦酸)(EDBDMPO,H4L5)、邻苯二胺-N、N′-双(二甲基亚甲基膦酸)(PDBDMPO,H4L6)、二亚乙基三胺-N,N,N′,N′,N″-五(亚甲基膦酸)(DETAPMPO,H10L7)和二亚乙基三胺-N、N″-双(二甲基亚甲基膦酸)(DETBDMPO,H4L8)的合成,并通过元素分析、热分析以及红外光谱、紫外可见光谱、电致发光光谱和磁性测量进行了表征。这些复合物热分解过程的第一阶段显示了水合水的存在,第二阶段表示配位水分子的脱落。水分子消失后,有机部分开始分解。最终的分解产物是相应的 MO-P2O5。所研究复合物的数据表明,Co(II) 和 Ni(II) 具有八面体几何形状,Cu(II) 具有四方畸变八面体几何形状。根据磁矩数据推断出了反铁磁性。为确定配位位点,还进行了红外光谱研究。