Solvent extraction and lanthanide complexation studies with new terdentate ligands containing two 1,3,5-triazine moieties
作者:Michael G. B. Drew、Clement Hill、Michael J. Hudson、Peter B. Iveson、Charles Madic、Tristan G. A. Youngs
DOI:10.1039/b312582c
日期:——
species crystal structures of L5 and the complex formed between Yb(III) with 2,6-bis(4,6-di-amino-1,3,5-triazin-2-yl)-pyridine (L4) were also determined. The structure of L5 shows 3 methanol solvent molecules all of which form 2 or 3 hydrogen bonds with triazine nitrogen atoms, amide nitrogen or oxygen atoms, or pyridine nitrogen atoms. However, L5 is relatively unstable in metal complexation reactions
萃取剂 2,6-双(4,6-二新戊酰氨基-1,3,5-三嗪-2-基)-吡啶(L 5)在正辛醇 被发现,与 2-溴莫多酸,当用于从0.02–0.12 M中提取金属离子时,D Am / D Eu分离因子(SFs)在2.4和3.7之间HNO 3。在没有协同剂的情况下,当配体用于从0.98 M中提取Am(III)和Eu(III)HNO 3。为了研究提取物L 5的晶体结构以及Yb(III)与Yb(III)之间形成的配合物的可能性质。2,6-双(4,6-二氨基-1,3,5-三嗪-2-基)-吡啶(L 4)也被确定。L 5的结构表示3甲醇 溶剂 全部与2或3个氢键形成分子的分子 三嗪 氮原子, 酰胺 氮 或氧原子,或 吡啶 氮原子。然而,L 5在金属络合反应中相对不稳定并且失去酰胺基以形成母体四胺L 4。Yb(L 4)(NO 3)3的晶体结构显示在9配位环境中键合到the的三个施主原子上配体 和三个双齿