Abstract: A diboronic acid saccharide (covalent) receptor site and a crown metal ion (electrostatic) receptor site are succesfully coupled in an allosteric system. The binding of monosaccharides with 2b as intramolecular 1: 1 complexes was monitored bv circular dichroism (CD). Added calcium perchlorate reduces the binding of the 1: l saccharide complexes as follbwed by a decrease in the'CD activity. the Na+/D-glucose cotransport ...
