New interlocked molecules generated from a podand containing urea units and imidazolium salts using an anion template
作者:Boosayarat Tomapatanaget、Thawatchai Tuntulani、James A. Wisner、Paul D. Beer
DOI:10.1016/j.tetlet.2003.11.064
日期:2004.1
A podand containing urea units (L) was found to form interlocked structures with 2,5-dihexylamide imidazolium salts (3·X), 2,5-dihexyl imidazolium salts (4·X), and 2,5-dihexyl benzoimidazolium salts (5·X), where X=Cl−, Br−, and PF6− using anions as templates. The binding ability of L and guest molecules was evaluated by 1H NMR titrations in CDCl3. It was found that L could form complexes with guest
发现含有尿素单元(L)的豆荚与2,5-二己酰胺咪唑盐(3 · X),2,5-二己咪唑盐(4 · X)和2,5-二己基苯并咪唑盐(3。5 · X),其中X = Cl - ,溴-和PF 6 -使用阴离子作为模板。通过在CDCl 3中的1 H NMR滴定评估L和客体分子的结合能力。发现L可以按以下顺序与客体分子形成络合物,3 ·X > 5 · X > 4 · X。配合物的稳定性也依赖于模板的阴离子的形状值:Cl - >溴- »PF 6 - 。氢键和π-π堆积相互作用在这些互锁分子的自组装中起着重要作用。