Citation: Tian Sheng-Jun, Cheng Qing-Tang, Xi Guo-Xi, Lou Xiang-Dong, Li Jing-Hua. Preparation of Inclusion Complex of Benzyl Acetate with β-Cyclodextrin and Studies on its Thermal Dissociation[J]. Acta Physico-Chimica Sinica, 1997, 13(05): 459-465. doi: 10.3866/PKU.WHXB19970515
English
Preparation of Inclusion Complex of Benzyl Acetate with β-Cyclodextrin and Studies on its Thermal Dissociation
The inclusion complex of benzyl acetate (BA) with β-cyclodextrin (β-CD) was prepared and was confirmed by thermal analysis and X-ray diffraction (XRD). The composition of the complex was identified by thermogravimetry (TG) and elemental analysis as β-CD•C9H10O2•6H2O•TG and DSC studies showed that the thermal dissociation of β-CD•C9H10O2•6H2O took place in three stages: the dehydration occurred at 80-120 ℃; the dissociation of β-CD•C9H10O2 occurred at 245-270℃; and the decomposition of β-CD began at 285℃. The kinetics of dissociation of β-CD•C9H10O2 was studied by means of TG. The results showed that the dissociation ofβ-CD•C9H10O2 was controlled by a two-dimensional random nucleation and subsequent growth process (A3), the activation energy E is 172.85kJ•mol-1, and the pre-exponential factor A is1.1392×1016.min- 1.
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Key words:
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β-Cyclodextrin
- / Benzyl acetate
- / Inclusion complex
- / Thermal dissociation
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