Abstract

Under the conditions of a modified “one-pot” Zincke reaction, novel aza-merocyanines based on the dimer of malononitrile, pyridine, and α-iodonicotinonitrile derivatives were synthesized. It was demonstrated that in the presence of weak bases, the solutions of the obtained compounds exhibit fluorescence with λmaxem around 660 nm, accompanied by a color change from pale yellow to violet. Interaction of these aza-merocyanines with the potassium salt of the malononitrile dimer yielded a new glutaconaldehyde derivative, which can be used for the quantitative fluorimetric determination of Fe3+ ions at low concentrations.

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