Abstract
Various classes of compounds, including hydroquinone, urea, cyclodextrin and montmorillonite, can act as host compounds having several types of inclusion spaces, such as three-dimensional cages, parallel channels and layers1. Despite the variety of host compounds, however, little attention has been paid to the possible complexation of two or more of different kind host components: all inclusion compounds so far reported2 use a single component as the host structure. We have now prepared, for the first time, a host compound consisting of two components, one layered and one single channel-like, in which dimers of 1:1 complex of Cu(II) with mono-(6-β-aminoethylamino-6-deoxy)-β-cyclodextrin (CDen) are formed in a stable condition and are closely packed between the silicate layers of montmorillonite, with their opening faces parallel to the interlayer surface. This compound is unique because the cyclodextrin which it takes up as a guest component can also act as host for many substances. In view of the enzymatic function of cyclodextrins, this class of compounds seems promising for use as an immobilized artificial enzyme and in models of membrane enzymes.
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Kijima, T., Tanaka, J., Goto, M. et al. A complex of copper (II)-montmorillonite with a modified cyclodextrin. Nature 310, 45–47 (1984). https://doi.org/10.1038/310045a0
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DOI: https://doi.org/10.1038/310045a0
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