Journal of Colloid and Interface Science, Vol.497, 343-349, 2017
Stoppering/unstoppering of a rotaxane formed between an N-hetorycle ligand containing surfactant: beta-cyclodextrin pseudorotaxane and pentacyanoferrate(II) ions
The assembly of a surfactant-based rotaxane by adding the labile aquopentacyanoferrate(II) ion to the previously formed pseudorotaxane between the surfactant 11-(isonicotinoyloxy)-N,N,N-triethyl-1-unde canaminium bromide and beta-cyclodextrin was investigated by H-1 NMR and kinetic measurements. NMR spectroscopy has showed that the rotaxane can be formed through two different mechanisms. The rotaxane can be unstoppered by using the pyridine ligand substitution reaction by the high-field cyanide ligand. In this work a new method is developed for the preparation of several new surfactant-based rotaxanes by changing the hydrophilic and hydrophobic regions of the surfactants and the nature of the macrocycle. (C) 2017 Elsevier Inc. All rights reserved.