摘要
测定了二（２，４，４－三甲基戊基）二硫代膦酸（ＨＢＴＭＰＤＴＰ）萃取Ｎｄ３＋的表观平衡常数为１０－１１．８。ＨＢＴＭＰＤＴＰ与Ｎｄ３＋形成的萃合物随皂化度的增大，萃合物颜色、组成均发生变化。萃合物中含有Ｈ２Ｏ，皂化度较高时有ＯＨ－进入萃合物取代ＢＴＰＭＰＤＴＰ－，与水合离子相比较，Ｎｄ３＋与ＨＢＴＭＰＤＴＰ的萃合物的紫外吸收峰的位置发生红移，ｆ－ｆ跃迁超灵敏吸收强度增大，说明萃合物中Ｓ－金属离子之间存在较大程度的共价性。
The study on the extraction of micro amount of Nd with bis(2,4,4 trimethylpentyl) dithiophosphinic acid (HBTMPDTP) indicates that the apparent extraction constant is 10 -11.8 . The complex of HBTMPDTP and Nd 3+ is very complicated. Both the color and the component of complex change with the increase in the saponification degree of extactant. The complex contains water molecule and OH - at a high saponification degree with high Nd/HA ratio. Compared with the hydrated Nd 3+ ion, red shift and high intensity of f f transition supersentitive absorption spectra of Nd 3+ is observed in HBTMPDTP Nd 3+ complex. It demonstrates the higher covelency of S Nd 3+ bond.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第4期1-4,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
萃取
钕
HBTMPDTP
Nd
bis(2,4,4 trimethylpentyl) dithiophosph inic acid (HBTMPDTP)
extraction
