Application of ultra-high magnetic field for saccharide molecules: 1H NMR spectra of 6-O-α-d-glucopyranosyl-cyclomaltoheptaose and -cyclomaltohexaose

Abstract 1 H NMR spectra of G1-α-CD and G1-β-CD were recorded using a spectrometer equipped with a 21.6 T magnet. An ultra-high magnetic field was effective for detecting 1 H NMR signals with a small difference in chemical shifts. Introducing a glucosyl group onto CDs as a branch caused deformation of equilibrated 1 H signals of cyclodextrin. Particularly, 1 H signals in branched glucose were shifted greatly.