Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 54: Issue 3
Kinetic Studies on the Thermal Dissociation of β-Cyclodextrin·Ethyl Benzoate Inclusion Complexes
Authors:
G. Zhang Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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X. Li Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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S. Tian Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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J. Li Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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J. Wang University of Connecticut Storrs Department of Chemistry CT 06268 USA CT 06268 USA

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X. Lou Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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Q. Cheng Henan Normal University Department of Chemistry Xinxiang, Henan 453002 (People‘s Republic of China) Xinxiang, Henan 453002 (People‘s Republic of China)

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Pages:
947–956
Online Publication Date:
03 Nov 2004
Publication Date:
01 Dec 1998
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010129028436
Keywords:
β-cyclodextrin; ethyl benzoate; inclusion complex; kinetics; thermal decomposition
Restricted access

Abstract  

The stability of β-cyclodextrinethyl benzoate6H2O(β-CDC6H5COOC2H56H2O) was investigated by TG and DSC. The mass loss takes place in three stages: the dehydration occurs at 50-120C; the dissociation of β-CDC6H5COOC2H5occurs at 200-260C; the decomposition of β-CD begins at 280C. The kinetics of the dissociation of β-CDC6H5COOC2H5in a dry nitrogen flow was studied by means of thermogravimetry both at constant temperature and linearly increasing temperature. The results show that the dissociation of β-CDC6H5COOC2H5is dominated by a three-dimensional diffusion process (D3). The activation energy E is 116.19 kJ mol-1and the pre-exponential factor A 6.5358109min-1. Cyclodextrin is able to form inclusion complexes with a great variety of guest molecules, and the studies focus on the energy of binding between cyclodextrin and the guest molecule. In this paper, the β-cyclodextrinethyl benzoate inclusion complex was studied by fluorescence spectrophotometry and infrared absorption spectroscopy, and the results show that the stable energy of inclusion complexes of β-CD with weakly polar guest molecules consists mainly of van der Waals interaction.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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