Reversing a Rotaxane Recognition Motif: Threading Oligoethylene Glycol Derivatives through a Dicationic Cyclophane
作者:Sheng-Hsien Chiu、J. Fraser Stoddart
DOI:10.1021/ja012654t
日期:2002.4.1
[2]pseudorotaxane to give a stable [2]rotaxane. The [2]pseudorotaxane is formed in nitromethane when a benzylic dibromide, obtained after reacting an excess of 1,4-bis(bromomethyl)benzene with hexaethylene glycol, is added to an equimolar amount of a dicationic cyclophane in which two -CH2OCH2- chains link a pair of dibenzylammonium ions through the para positions on their phenyl rings. When the [2]pseudorotaxane