Highly selective recognition of monosaccharide based on two-component system in aqueous solution

A highly selective switch for d-fructose was formed by water-soluble conjugated polymer PP-S-BINOL and tetraboronic acid functionalized benzyl viologen ToBV. The two-component system showed a high selectivity and sensitivity only for d-fructose in familiar d-monosaccharides. The high selectivity of the sensing system for d-fructose may be depended on stable pyranose ester form of d-fructose with ToBV. A desirable linear response of the sensing system to low concentrations of d-fructose (<10.0 mM) was observed with 0.9936 linear dependent coefficient at pH 7.4.