Publication: Synthesis and photostability of methoxycinnamic acid modified cyclodextrins
Issued Date
2010-04-30
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ISSN
10106030
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2-s2.0-77951666067
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Photochemistry and Photobiology A: Chemistry. Vol.212, No.1 (2010), 56-61
Suggested Citation
Thitinun Karpkird, Supason Wanichweacharungruang Synthesis and photostability of methoxycinnamic acid modified cyclodextrins. Journal of Photochemistry and Photobiology A: Chemistry. Vol.212, No.1 (2010), 56-61. doi:10.1016/j.jphotochem.2010.03.016 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/28898
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Title
Synthesis and photostability of methoxycinnamic acid modified cyclodextrins
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Abstract
Various cyclodextrins, alpha, beta and gamma, were esterified with 4-methoxy-, 2,4,5- and 2,4,6-trimethoxycinnamic acids. Upon esterification with β-cyclodextrin, the photostability of 2,4,5-trimethoxycinnamate increased while no improvement was observed for 4-methoxycinnamate and 2,4,6-trimethoxycinnamate. However, increase in the photostability of 4-methoxycinnamoyl moiety could be observed when esterified with α-CD and that of 2,4,6-trimethoxycinnamoyl moiety could be observed after being esterified with γ-CD. These photostability data together with the 2D NMR analyses indicated that the 4-methoxycinnamoyl, 2,4,5-trimethoxycinnamoyl and 2,4,6-trimethoxy cinnamoyl moieties could enter the α-CD, the β-CD, and the γ-CD cavities, respectively. © 2010 Elsevier B.V. All rights reserved.