During the past two decades there has been considerable interest in reactions which can be carried out at interfaces. One aspect of this work has involved the catalysis or inhibition of solution reactions by submicroscopic entities such as polyelectrolytes, cyclodextrins, or micelles. (Work in these areas is discussed in Ref. 1, which provides a comprehensive summary of micellar catalysis and inhibition up to 1974.) These reactions often occur at the interface between the solvent, which is usually water or an aqueous organic mixture, and the submicroscopic particle or aggregate. There has been the hope that these interfacial systems would mimic enzymic catalysts, and at the least give some evidence on the factors which govern this catalysis, and many of the reactions studied, e.g., de-acylation and dephosphorylatum, are of biological interest [2-6].
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