Abstract
The Knoevenagel condensation of 1,4-dimethylpyridinium and 1,4-dimethylquinolinium salts with 4-formylbenzeneboronic acid gave new stilbazolium dyes (2) and (3), respectively. The UV-VIS absorption behavior of the boronicacid-substituted stilbazolium dyes were studied in acetonitrile-aqueous buffered solutions (1:25 v/v), in the absence and in the presence of various sugars as guest species. The dyes form complexes with monosaccharides at neutral pH together with a bathochromic shift of the intramolecular charge transfer band.
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