Aza crown ether calix[4]arenes containing cation and anion binding sites: effects of metal ions towards anion binding ability

被引：51
|
作者：
Tuntulani, T [1 ]
Poompradub, S
Thavornyutikarn, P
Jaiboon, N
Ruangpornvisuti, V
Chaichit, N
Asfari, Z
Vicens, J
机构：
[1] Chulalongkorn Univ, Fac Sci, Dept Chem, Bangkok 10330, Thailand
[2] Thammasat Univ Rangsit, Fac Sci, Dept Phys, Pathum Thani 12121, Thailand
[3] CNRS, Grp Chim Interact Mol Specif, ECPM, F-67087 Strasbourg 2, France
来源：
TETRAHEDRON LETTERS | 2001年 / 42卷 / 32期
关键词：
aza crown; calix[4]arene; anion binding; proton NMR titration;
D O I：
10.1016/S0040-4039(01)01029-2
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
Tripodal aza crown ether calix[4]arenes containing both cation and anion binding sites (5a and 5b) have been synthesized. The X-ray analysis shows that 5a forms a self-threaded rotaxane-like structure in the solid state. H-1 NMR titrations of the two ligands with various halide anions indicate that 5a and 5b can form complexes with Br- and I- but not F-. However, both compounds form more stable complexes with I- than with Br- in the presence of BU4N+. The presence of K+ enhances the binding ability of 5a towards Br-. (C) 2001 Elsevier Science Ltd. All rights reserved.
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收藏
页码：5541 / 5544
页数：4
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