Metal Cation Controlled Supramolecular Assembly of 1‐Butyl‐4,4′‐bipyridinium and Cucurbit[8]uril
作者:Xin Xiao、Jing‐Xin Liu、Kai Chen、Qian‐Jiang Zhu、Sai‐Feng Xue、Zhu Tao
DOI:10.1002/ejic.201000020
日期:2010.7
The crystal structures of these supramolecular assemblies show that Q[8] can selectively encapsulate either the bipyridinium or butyl moiety of the 1-butyl-4,4'-bipyridinium guest in its hydrophobic cavity to form ternary complexes through the influence of metal-ligand coordination. The main driving force of the selective formation of these supramolecular assemblies may be due to ion-dipole interactions
三个超分子组装体 [(C 14 H 17 N 2 ) 2 ⊂C 48 H 48 N 32 -O 16 ]Cl 2 ·23H 2 O (1), [C 14 H 17 N 2 Cu(H 2 O) 5 ] 2 ⊂C 48 H 48 N 32 O 16 }-[(C 14 H 17 N 2 ) 2 ⊂C 48 H 48 N 32 O 16 ]Cl 4 (NO 3 ) 4 ·32H 2 O (2),和[ C 14 H 17 N 2 Ni(H 2 O) 5 ] 2 ⊂C 48 H 48 N 32 O 16 }[(C 14 H 17 N 2 ) 2 ⊂C 48 H 48 -N 32 O 16 ]Cl 2 (NO 3 ) 6 ·22H 2 O (3) 在水溶液中合成并用X 射线衍射表征。这些超分子组装体的晶体结构表明,Q[8] 可以选择性地将 1-丁基-4,4'-联吡啶客体的联吡啶部分或丁基部分包裹在其