The uptake of α-, β-, γ-, hexakis-2,6-di-O-methyl-α-(DM-α-), heptakis-2,6-di-O-methyl-β-(DM-β-) and heptakis-2,3,6-tri-O-methyl-β- (TM-β-) cyclodextrins (CD's) by Na-, Ca-, and Cu-montmorillonites has been studied at 25°C. Each of α-, DM-α-, DM-β-, and TM-β-CD's forms a complex with all of these montmorillonites in which the guest molecules are arranged as a monolayer with their open faces parallel to the silicate sheet of montmorillonite. On the other hand, γ-CD is intercalated only by the Na form and β-CD cannot be taken up by any of the clays used. The interlayer spacing of the α-CD complex varies from 18.0 to 21.5 Å with replacement of the interlayer cation, but those of the methylated α-and β-CD complexes remain unchanged, beingca. 21 and 18 Å, respectively. The different behaviour of the parent and methylated CD's is explained in terms of the structural and physicochemical characteristics of the individual CD's and interlayer cations.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
T. Kijima, J. Tanaka, M. Goto, and Y. Matsui:Nature 130, 45 (1984).
T. Kijima, M. Kobayashi, and Y. Matsui:J. Incl. Phenom. 2, 807 (1984).
D. J. Greenland:J. Soil Sci. 7, 319 (1956);7, 325 (1956).
B. K. G. Theng:The Chemistry of Clay-Organic Reactions, Adam Hilger, London (1974), Ch. 1.
K. Uekama:Pharmacy International 61 (1985).
D. J. Greenland, R. H. Laby, and J. P. Quirk:Trans. Faraday Soc. 58, 829 (1962).
K. Norrish:Nature 173, 256 (1954).
H. van Olphen:An Introduction to Clay Colloid Chemistry, John Wiley, New York (1977), Ch. 10.
About this article
Cite this article
Kijima, T. Complexation of Na-, Ca-, and Cu-montmorillonites with some parent and methylated cyclodextrins. Journal of Inclusion Phenomena 4, 333–338 (1986). https://doi.org/10.1007/BF00656160