Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (05): 459-465.doi: 10.3866/PKU.WHXB19970515

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Preparation of Inclusion Complex of Benzyl Acetate with β-Cyclodextrin and Studies on its Thermal Dissociation

Tian Sheng-Jun,Cheng Qing-Tang,Xi Guo-Xi,Lou Xiang-Dong,Li Jing-Hua   

  1. Department of Chemistry,Henan Normal University,Xinxiang 453002
  • Received:1996-09-10 Revised:1996-12-23 Published:1997-05-15
  • Contact: Tian Sheng-Jun

Abstract:

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.

Key words: β-Cyclodextrin, Benzyl acetate, Inclusion complex, Thermal dissociation