1254961-52-8Relevant articles and documents
Reversible formation and destruction of micelles of amphiphilic compounds in aqueous media. competition with pseudorotaxane formation
Suzaki, Yuji,Taira, Toshiaki,Osakada, Kohtaro
experimental part, p. 378 - 384 (2010/07/09)
N-Alkyl-4,4′-bipyridiniums [4,4′-bpy-N-(CH2) nOAr]+(Cl-) (n = 6 and 10, Ar = C 6H3-3,5-t-Bu2, C6H 3-3,5-(OMe)2, and C6H2-2,4,6-Me 3), having the cationic bipyridinium group and a long hydrophobic alkyl chain, were prepared from the reaction of 4,4′-bipyridine with the corresponding alkyl chlorides. The amphiphilic compounds in water form micelles which encapsulate added pyrene in the hydrophobic core. Addition of α-cyclodextrin to the micellar solution converts a part of the aggregated amphiphilic molecules to their pseudorotaxane with α-cyclodextrin. Formation of the pseudorotaxanes is favored at lower temperature, as is observed by temperature dependent change of the absorption spectra.