High complexation ability of thiacalixarene with transition metal ions. The effects of replacing methylene bridges of tetra(p-t-butyl)calix[4]arenetetrol by epithio groups
High complexation ability of thiacalixarene with transition metal ions. The effects of replacing methylene bridges of tetra(p-t-butyl)calix[4]arenetetrol by epithio groups
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DOI：
10.1246/bcsj.71.1597
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发表时间：
1998-07-01
影响因子：
4
通讯作者：
Miyano, S
中科院分区：
文献类型：
--
作者：
Iki, N;Morohashi, N;Miyano, S
通过溶剂萃取研究，研究了四（对叔丁基）四噻卡利[4]芳四醇（TCA，H4L）（一种桥接四个环硫基团的对（叔丁基）苯酚环状四聚体）结合金属离子的能力。尽管四(对叔丁基)杯[4]芳四醇 (CA) 对过渡金属离子 (M2+) 的亲和力非常差，但 TCA 是这些金属离子的优异萃取剂。通过斜率分析发现提取的TCA金属配合物的化学式为中性1:1配合物[MH2L]。讨论了 TCA 对过渡金属离子的高亲和力的起源，其中表明环硫基的连接很重要，[ZnH2L] 络合物的 NMR 研究证明了这一点。
The ability of tetra(p-t-butyl)tetrathiacalix [4]arenetetrol (TCA, H4L), a cyclic tetramer of p-(t-butyl)phenol bridged with four epithio groups, to bind metal ions was investigated via a solvent extraction study. Although tetra(p-t-butyl)calix[4]arenetetrol (CA) has very poor affinity for transition metal ions (M2+), TCA is an excellent extractant of these metal ions. The chemical formulae of the extracted TCA metal complexes were found by slope analysis to be neutral 1:1 complexes [MH2L]. The origin of the high affinity of TCA for transition metal ions is discussed, in which it is suggested that Ligation of the epithio group is important as evidenced by an NMR study of the [ZnH2L] complex.