Solid-state NMR characterization of cyclomaltoheptaose (?-cyclodextrin) polymers using high-resolution magic angle spinning with gradients

Abstract

Solid-state nuclear magnetic resonance (NMR) techniques were used to characterize cyclomaltoheptaose (β-cyclodextrin, β-CD) polymers. These insoluble materials have been investigated by cross-polarization magic angle spinning with dipolar decoupling (CP/MAS), magic angle spinning without dipolar decoupling (MAS), and high-resolution magic angle spinning with gradients (HRMAS). These NMR spectra allow the assignment of the principal 1H and 13C signals. The presence of two distinct components (cross-linked β-CD and polymerized epichlorohydrin) in the materials was clearly demonstrated. These polymers were used as sorbents and the resulting NMR spectra are presented and discussed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1288–1295, 2000