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Thermoanalytical Study of the Dehydration of Cyclodextrin Inclusion Complexes of Clofibric Acid (1999)

Caira, M. R. ; Bourne, S. A. ; Mvula, E.

Springer

Journal of thermal analysis and calorimetry 56 (1999), S. 1329-1334

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ISSN: 1572-8943

Keywords: cyclodextrin complexes ; dehydration ; kinetics ; TG-DSC

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Hydrated inclusion complexes of the hosts β-CD (CD=cyclodextrin), γ-CD and permethylated β-CD with the guest clofibric acid were analysed by TG and DSC methods to characterise their dehydration behaviours. Activation energies for dehydration of the β- and γ-CD clofibric acid complexes, determined by isothermal thermogravimetry, are significantly lower (∼20-25%) than those for the corresponding uncomplexed hydrated CDs. These data can be reconciled with X-ray structural data which show that H2O molecules in the complexes occupy different crystal sites from those occupied in the parent CDs.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1010154406451

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