【摘要】 采用饱和溶解法制得了异丙基膦酸二-2-乙基己基酯与除钷以外的镧系金属硝酸盐的配合物。通过元素分析、红外光谱、核磁共振、差热分析和磁性质的研究,讨论了配合物的结构。对配合物的红外光谱特征频率与镧系元素原子序数之间的变化关系也做了探讨更多还原

【Abstract】 The preparation, characterization, spectroscopic studies and data on thermo-and magnetic measurments of coordination compounds of di（2-ethylhexyl） isopropylphosphonate（DIOPP）with nitrates of lantha- nide （except promethium） are described As shown by elemental analysis the composition of the coordination compounds prepared by saturation method can be represented as Ln（NO₃）₃·3DIOPP which is well coincided with the results of method of continuous variation.The IR spectra of the Ln（NO₃）₃·3DIOPP demonstrated that the characteristic frequency including v_p-o-M, V_p-o-c and V_{M-O（NO3¹）}) increased with the increase of the atomic number of lanthanide. It may be rationalized as the weakening effect of the coordination associated with lanthanide contraction. Far IR spectra of the coordination compounds showed very small variation of v_M-O from lanthanum to lutetium in the region of 214～219 cm^-1 only v_Y-O located at highest 251cm^-1.The ¹H NMR spectra indicated that the chemical shift of proton at the α-carbon atom of the alkoxy group of ligand in the complexes of light rare earths located at down field while for heavy rare earths, at up field. It may, however, be contributed to the different geometrical. configuration of the complexes investigated.The susceptibiity of complexes were determined in 2000～9000 G region and the effective magnetic moment of metal ions in the complexes were estimated. The result also shows that the coordination of lanthanide’s ion with DIOPP is very weak. It is interesting to note that the effective magnetic moment has not yet been studied in a systematic way as to lanthanide nitrate and teir complexes with neutral organophosphorus ligands.As shown by the TG and DTA diagram of the complexes there are two thermo-decomposition process in all cases. An explaination was given for the variation of weight loss between experimental and theoretical data for the proposed reaction scheme.更多还原