The novel lipophilic metal extractants of the class dialkyldiaza-tetraalkyloctanediamide (DADA) useful to selectively separate trivalent americium (sup. 241 Am) from trivalent lanthanides are represented by the formula 1:
Wherein R is a C
1
to C
5
normal alkyl and R′ is a C
4
to C
8
normal and branched alkyl group. The compounds are synthesized at high yield and purity by the reaction of corresponding N,N′-dialkylethylenediamine and N,N-dialkyl-2-chloroacetamide. The separation is achieved by utilizing the soft-soft interaction between the trivalent actinides and ‘N’ atoms of the extractant. Both soft donor “n” and hard donor ‘O’ sites are incorporated in the molecule for better extraction of trivalent actinides over trivalent lanthanides. Thus, this molecule can be used as selective extractant to separate trivalent actinides from trivalent lanthanides.
这段文字描述了一类新型亲脂性
金属萃取剂——二烷基二氮四烷二酰胺(D
ADA),可用于从三价
镧系元素中选择性分离三价
镅(241Am)。该类化合物的通式为1:其中R是C1到C5的正链烷基,R'是C4到C8的正支链烷基。这些化合物通过相应的N,N'-二烷基
乙二胺和N,N-二烷基-2-
氯乙酰胺的反应高产高纯度合成。分离过程利用三价
锕系元素与萃取剂中的“N”原子之间的软软相互作用来实现。分子中同时包含软给体“n”和硬给体“O”位点,以更好地萃取三价
锕系元素而不是三价
镧系元素。因此,该分子可用作选择性萃取剂,用于从三价
镧系元素中分离三价
锕系元素。