Moon Kwangyul, Kaifer Angel E
Center for Supramolecular Science and Department of Chemistry, University of Miami, Coral Gables, Florida 33124-0431, USA.
Org Lett. 2004 Jan 22;6(2):185-8. doi: 10.1021/ol035967x.
[structure: see text] Host-guest interactions between cucurbit[7]uril (CB7) and a series of dialkyl-4,4'-bipyridinium (viologen) dicationic guests were investigated by NMR spectroscopy. CB7 includes the aromatic nucleus of short chain viologens, but the mode of interaction is different with longer chain viologens due to the favorable hydrophobic interactions between the terminal alkyl substituents and the inner cavity of the host. A new pseudorotaxane was designed and synthesized on the basis of viologen-CB7 binding interactions.
[结构：见正文] 通过核磁共振光谱研究了葫芦[7]脲（CB7）与一系列二烷基-4,4'-联吡啶鎓（紫精）双阳离子客体之间的主客体相互作用。CB7包含短链紫精的芳香核，但由于末端烷基取代基与主体内腔之间有利的疏水相互作用，其与长链紫精的相互作用模式不同。基于紫精-CB7结合相互作用设计并合成了一种新的准轮烷。
