diffraction analyses revealed that the nitrogen atoms of cyclen ring combined two protons to form a cation with two positive charges. The protonated DOTAM-n-butyl had strong extraction ability and good selectivity for ReO4−. It was extracted by means of the substitution of one ReO4− for one NO3− in the 1:2 complex of DOTAM-n-butyl with HNO3. The solvent extraction and X-ray crystallography demonstrated an
摘要 两个 DOTA-四酰胺
配体,DOTAM-正丁基(1,4,7,10-四[(正丁基;
氨基甲酰基)甲基]-1,4,7,10-四
氮杂环十二烷)和 DOTAM-苄基(1 ,4,7,10-四[(N-苄基
氨基甲酰基)甲基]-1,4,7,10-四
氮杂环十二烷)被合成并通过MS、NMR和FTIR光谱表征。在酸性溶液中,DOTAM-n-丁基易被质子化。FTIR、1H NMR、ESI-MS 光谱和 X 射线衍射分析表明,cyclen 环的氮原子结合了两个质子,形成了一个带有两个正电荷的阳离子。质子化的 DOTAM-n-丁基对 ReO4− 具有很强的萃取能力和良好的选择性。它是通过用
HNO3 在 DOTAM-正丁基的 1:2 络合物中用一个 ReO4- 取代一个
NO3- 来提取的。溶剂萃取和 X 射线晶体学证明了阴离子交换萃取模型。同时,