Abstract
Fully hydrated as well as dried benzaldehyde complexes of α- and β-cyclodextrins were studied by using CP/MAS13C NMR techniques. Variable temperature studies have shown that below ∼ 200 K the guest is rigidly held in the complex, whereas at 328 K, only the aromatic ring performs rapid two-fold flips about the C1−C4 axis. In the β-Cd complex the benzaldehyde performs more general reorientation. Removal of water causes marked changes in both guest and host spectra, generally consistent with a loss of short-range order and increase in guest motional rate.
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NRCC No. 27826.
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Ripmeester, J.A. Variable temperature CP/MAS13C NMR study of cyclodextrin complexes of benzaldehyde. Journal of Inclusion Phenomena 6, 31–40 (1988). https://doi.org/10.1007/BF00659366
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DOI: https://doi.org/10.1007/BF00659366