Sz. Yu et al., KINETIC-STUDIES OF THE THERMAL-DISSOCIATION OF BETA-CYCLODEXTRIN-CINNAMYL ALCOHOL INCLUSION COMPLEX, Journal of thermal analysis, 49(3), 1997, pp. 1517-1525
The stability of beta-cyclodextrin-cinnamyl alcohol inclusion complex
(beta-CD . C9H10. 8H(2)O) was investigated using TG and DSC. The mass
loss took place in three stages: the dehydration occurred between 50-1
20 degrees C; the dissociation of beta-CD . C9H10O occurred in the ran
ge of 210-260 degrees C; and the decomposition of beta-CD began at 280
degrees C. The dissociation of beta-CD . C9H10O was studied by means
of thermogravimetry, and the results showed: the dissociation of PCD C
D . C9H10O was dominated by a two-dimensional diffusion process (D-2).
The activation energy E was 161.2 kJ mol(-1), the pre-exponential fac
tor A was 4.5 x 10(13) min(-1). Cyclodextrin is able to form inclusion
complexes with a great variety of guest molecules, and the interestin
g of studies focussed on the energy binding cyclodextrin and the guest
molecule. In this paper, beta-cyclodextrin-cinnamyl alcohol inclusion
complex was studied by fluorescence spectrophotometry and infrared ab
sorption spectroscopy, and the results show: the stable energy of incl
usion complexes of beta-CD with weakly polar guest molecules consists
mainly of Van der Waals interaction.