Complexation of Vanillin and Ethylvanillin with α-, β-, and γ-Cyclodextrin

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The fluorescence of vanillin and ethylvanillin in aqueous solution was investigated in the presence of α-, β-, and γ-cyclodextrin (CD). The fluorescence intensity of vanillin was enhanced with increasing CD concentration in the order of γ＜β＜α-CD. Benesi-Hildebrand (BH) plot based on these fluorescence data showed the linear relationship between 1/(I-I_0) and 1/[CD]_0, where I0 and I are the fluorescence intensities in the absence and presence of CD, respectively, and [CD]_0 is initial concentration of CD. The results indicated that 1:1 vanillin-CD inclusion complex was formed under the experimental condition. The binding constants of vanillin against CDs from the BH plot were in the order of α＜γ＜β-CD. The binding constant of vanillin to β-CD was estimated as 2.7×10^2×M^{-1}. The binding constants of ethylvanillin were 4-5 times smaller than those of vanillin. The binding ability of vanillin to β-CD became reduced with increasing the concentration of methanol.

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詳細情報 詳細情報について

  • CRID
    1390853649613825664
  • NII論文ID
    110006197804
  • NII書誌ID
    AA00247166
  • DOI
    10.5109/9287
  • HANDLE
    2324/9287
  • ISSN
    00236152
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • IRDB
    • Crossref
    • CiNii Articles

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