β-Cyclodextrin Complexes of Benzaldehyde, Vanillin and Cinnamaldehyde: A Raman Spectroscopic Study1
作者:
Aida M.Moreira da Silva,
AnaM. Amado,
P.J.A. Ribeiro-Claro,
José Empis,
J.J.C. Teixeira-Dias,
期刊:
Journal of Carbohydrate Chemistry
(Taylor Available online 1995)
卷期:
Volume 14,
issue 4-5
页码: 677-684
ISSN:0732-8303
年代: 1995
DOI:10.1080/07328309508005369
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Raman spectra of benzaldehyde, vanillin andtrans-cinnamaldehyde, and of their complexes in β-cyclodextrin are presented and discussed. The guest molecules provide both an aromatic ring for privileged interaction with the cyclodextrin cavity, and characteristic vibrations (e.g., vC=O, vC=C, vCCϕ (ϕ=phenyl), vC-Hϕ) with group frequencies in spectral regions free from cyclodextrin bands which are useful for probing the guest perturbed by complex formation with β-cyclodextrin. In particular, the C=O bond is shown to be a good vibrational spectroscopic probe to monitor the effects of both the medium, through its dielectric constant, and of specific interactions, namely of the hydrogen bonding type. The first of these effects is evaluated theoretically and a Kirkwood-Bauer-Magat plot for benzaldehyde is used to estimate the effective dielectric constant for the guest in the benzaldehyde-β-cyclodextrin complex. The above mentioned Raman spectroscopic results are interpreted and discussed.
点击下载:
PDF (342KB)
返 回