Inclusion complexes of cyclodextrins with cinnamic acid derivatives: Dissolution and thermal behavior.
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Typical B<SUB>s</SUB> type phase solubility diagrams were obtained for α-and β-cyclodextrins (α-CyD and β-CyD) with methyl cinnamate, ethyl cinnamate, and cinnamaldehyde in water at 25°. Solid complexes for α-and β-CyDs with three guest molecules were obtained and their molar ratios were found to be 2 : 1 (α-CyD/guest molecule) and 1 : 1 (β-CyD/guest molecule), respectively. In sharp contrast, apparent stability constant (K<SUB>c</SUB>') and dissolution rate (k<SUB>c</SUB>') of α-CyD complexes were larger than those of β-CyD complexes. The thermal gravimetric analysis thermogram showed that the volatility of the guest molecule was lowered by the formation of CyD inclusion complex.
- 社団法人 日本薬学会の論文
社団法人 日本薬学会 | 論文
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