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Variable temperature CP/MAS13C NMR study of cyclodextrin complexes of benzaldehyde (1988)

Ripmeester, John A.

Springer

Journal of inclusion phenomena and macrocyclic chemistry 6 (1988), S. 31-40

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ISSN: 1573-1111

Keywords: Cyclodextrin ; CP MAS13C NMR ; benzaldehyde ; molecular motion

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: 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.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00659366

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