Preparation and characterization of polyrotaxanes containing many threaded .alpha.-cyclodextrins

摘要: Polyrotaxanes in which many α-cyclodertrins (α-CD) are threaded on a poly(ethylene glycol) chin were prepared by the reaction of complexes between α-CDs and bisamines with 2,4-dinitrofluorobensene is bulky enough to prevent dethreading. The products characterised gel permeation chromatography (GPC), UV-vis, X-ray diffraction (powder), 1 H NMR, 13 C CP/MAS 2D NOESY NMR spectra. GPC, spectra show that product consists α-CDs, glycol), 2,4-dinitrophenyl groups