Formation of the crystalline inclusion complex between γ-cyclodextrin and poly(N-acetylethylenimine)

Poly(N-acetylethylenimine) was found to form a crystalline inclusion complex with γ-cyclodextrin (CD). It did not form crystalline inclusion complexes with α-CD or β-CD. It is a hydrophilic, nitrogen atom-containing polymer that forms a crystalline inclusion complex with CD. FT-IR spectroscopy, thermogravimetry analysis, X-ray diffraction, 1H NMR spectra and 13C CP/MAS NMR spectra were used to characterize the structure and property of the crystalline inclusion complex.