Abstract
Inclusion complexes of polyisobutylene (PIB) with cyclodextrins (CDs) have been synthesized via molecular recognition. Our results show that the PIB structure and the CD cavity size are key factors in the formation of inclusion complexes. For example, mono- and diarm PIBs behave differently towards the formation of inclusion complexes with gamma-cyclodextrin (γCD). The design of a molecular inclusion complex of γCD with a low-molecular-weight diarm PIB is described. Solid-state nuclear magnetic resonance (NMR) spectroscopy indicated the formation of such complexes and powder X-ray diffraction data showed that the crystalline packing arrangements of the complexes are quite different from the host γCD.
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