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Kinetic studies on the thermal dissociation of β-cyclodextrin-cinnamyl alcohol inclusion complex

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Abstract

The stability of β-cyclodextrin-cinnamyl alcohol inclusion complex (β-CD·C9H10·8H2O) was investigated using TG and DSC. The mass loss took place in three stages: the dehydration occurred between 50–120°C; the dissociation of β-CD·C9H10O occurred in the range of 210–260°C; and the decomposition of β-CD began at 280°C. The dissociation of β-CD·C9H10O was studied by means of thermogravimetry, and the results showed: the dissociation of β-CD·C9H10O was dominated by a two-dimensional diffusion process (D2). The activation energyE was 161.2 kJ mol−1, the pre-exponential factorA was 4.5×1013 min−1.

Cyclodextrin is able to form inclusion complexes with a great variety of guest molecules, and the interesting of studies focussed on the energy binding cyclodextrin and the guest molecule.

In this paper, β-cyclodextrin-cinnamyl alcohol inclusion complex was studied by fluorescence spectrophotometry and infrared absorption spectroscopy, and the results show: 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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Authors and Affiliations

  1. Department of Chemistry, Henan Normal University, 453002, Xinxiang, P. R. China

    Shou-Zhi Yu, Xiao-Tao Li, Jing-Hua Li, Jin-Yun Wang & Sheng-Jun Tian

  2. Department of Chemistry, University of Connecticut, 06268, Storrs, CT, USA

    Jin-Yun Wang

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  1. Shou-Zhi Yu
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  2. Xiao-Tao Li
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  3. Jing-Hua Li
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  4. Jin-Yun Wang
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  5. Sheng-Jun Tian
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Yu, SZ., Li, XT., Li, JH. et al. Kinetic studies on the thermal dissociation of β-cyclodextrin-cinnamyl alcohol inclusion complex. Journal of Thermal Analysis 49, 1517–1525 (1997). https://doi.org/10.1007/BF01983712

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