In this report, the interaction of monoamide/diamide and monoamide/diglycolamide mixtures with UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{2 + }$$\end{document} are investigated in pH = 1 methanolic nitric acid media. These monoamides include N,N-dimethylacetamide (DMAA), N,N-diethylacetamide (DEAA), N,N-dibutylacetamide (DBAA) and N,N-dibutylbutanamide (DBBA). N,N,N′N′-tetraethylmalonamide (TEMA) and N,N,N′,N′-tetraethyldiglycolamide (TEDGA), which were chosen as model diamides and diglycolamides, respectively. Complex stability constants for each ligand were modelled using the Stability Quotients Using Absorbance Data program using UV–visible data. Complex stoichiometry of ligand mixtures was determined using Job plots and UV–Vis spectrometry. Monoamides were confirmed to produce only disolvate complexes with UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{2 + }$$\end{document} in solution. The log10(K) values for monoamides were found to be independent of amine-side chain length, but were slightly dependent on the carbonyl-side chain length. TEDGA was found to produce multiple uranyl complexes in solution. Job plot data indicated that the uranyl cation strongly prefers to bond either only with the monoamide or diamide in ternary monoamide–diamide–UO2 systems. Monoamide–diglycolamide–UO2 systems were more complicated, with Job plot data indicating the potential for multiple ternary species being present is dependent on the monoamide structure.

中文翻译：

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三元双氧铀系统在废燃料后处理中替代磷酸三正丁酯 (TBP) 的分光光度分析

在本报告中，单酰胺/二酰胺和单酰胺/二甘醇酰胺混合物与 UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} 的相互作用\usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{2 + }$$\end{document}在 pH = 1 的甲醇硝酸介质中进行研究。这些单酰胺包括 N,N-二甲基乙酰胺 (DMAA)、N,N-二乙基乙酰胺 (DEAA)、N,N-二丁基乙酰胺 (DBAA) 和 N,N-二丁基丁酰胺 (DBBA)。N,N,N'N'-四乙基丙二酰胺（TEMA）和N,N,N',N'-四乙基二甘醇酰胺（TEDGA）分别被选为模型二酰胺和二甘醇酰胺。每个配体的复杂稳定性常数通过使用吸光度数据的稳定性商数程序使用紫外-可见数据进行建模。使用工作图和紫外-可见光谱法确定配体混合物的复杂化学计量。单酰胺被证实仅产生与 UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage {upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{2 + }$$\end{document} 在解决方案中。发现单酰胺的 log10(K) 值与胺侧链长度无关，但略微依赖于羰基侧链长度。发现 TEDGA 在溶液中产生多种铀酰配合物。工作图数据表明铀酰阳离子强烈倾向于仅与三元单酰胺-二酰胺-UO2 系统中的单酰胺或二酰胺键合。单酰胺-二甘醇酰胺-UO2 系统更复杂，工作图数据表明存在多种三元物质的可能性取决于单酰胺结构。