Highly selective ensembles for d-fructose based on fluorescent method in aqueous solution

Three highly sensitive and selective switches for monosaccharides were composed by anionic polyelectrolyte PPPSO3Na and cationic viologen quencheres BBVs. The sensing processes of three ensembles (PPPSO3Na/o-BBV, PPPSO3Na/m-BBV and PPPSO3Na/p-BBV) to common seven monosaccharides have been determined by fluorescence spectra at pH 7.4 buffer solution. The results show that the three sensing ensembles all embody higher selectivity and sensitivity for d-fructose with reversible “on-off-on” fluorescence response. The research results can provide a new mode for developing highly selective probes.

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► In the study we establish three sensing ensembles for d-monosaccharides.
► These sensing ensembles are comprised of polyelectrolyte and BBVs quenchers.
► The ensembles all show high selectivity and sensitivity for d-fructose in seven monosaccharides.
► The research results can provide a new strategy for molecular recognition.