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用两个新型Ｎ－二乙酸基取代四氮杂大环配体（Ｈ２Ｌ３和Ｈ２Ｌ４）与硝酸铀酰和硝酸钍反应制得固体配合物，经红外光谱分析（ＩＲ）和元素分析确定配合物的组成分别为Ｔｈ（Ｈ２Ｌ３）·４ＮＯ３·Ｈ２Ｏ，Ｔｈ（Ｈ２Ｌ４）·４ＮＯ３·７Ｈ２Ｏ和ＵＯ２（Ｈ２Ｌ４）·２ＮＯ３·１２Ｈ２Ｏ。通过ｐＨ电位滴定和计算机数据拟合获得在（２５．０±０．１）℃时，０．５ｍｏｌ／ＬＫＮＯ３水溶液中Ｈ２Ｌ４的分步离解常数及与Ｔｈ４＋和ＵＯ２＋２形成１∶１型配合物的稳定常数。
Two new N-diacetoxyl substituted tetraazamacrocyclic ligands (H2L3 and H2L4) were reacted with uranyl nitrate and thorium nitrate to prepare solid complexes. IR spectra and elemental analyzes of the complexes The compositions are Th (H2L3) · 4NO3 · H2O, Th (H2L4) · 4NO3 · 7H2O and UO2 (H2L4) · 2NO3 · 12H2O, respectively. The stepwise dissociation constant of H2L4 in 0.5 mol / L KNO3 aqueous solution and the stability of the 1: 1 complex with Th4 + and UO2 + 2 were obtained at (25.0 ± 0.1) ℃ by pH potentiometric titration and computer data fitting. constant.