Novel polymethine dyes derived from aminals and aminal-acetals of conjugated ω-dimethylaminoaldehydes
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A series of tetracyanopolymethines has been synthesized by condensation of aminals and aminal-acetals of conjugated ω-dimethylaminoaldehydes with malonodinitrile.
These tetracyanopolymethines can be used as the anionic components in cation-anion cyanine dyes.
The electronic absorption spectra of these newly synthesized dyes were studied in both polar and nonpolar solvents. Specific cation-anion interaction and complex formation has been shown to occur in several of these cation-anion dyes in nonpolar solvents.
KeywordsAbsorption Spectrum Complex Formation Electronic Absorption Electronic Absorption Spectrum Cyanine
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