Study of some novel hexamethine quinaldine asycyanine colorants

Abstract

The main objective in this paper to study new hexamethine asy-cyanine colorants were synthesized by the reaction of N,N-dimethylaminophenylbutadienylphenyl ketone, N,N-dimethyl-aminophenylbutadienyl-4’- bromophenyl ketone and N,N-dimethylamino-phenylbutadienyl-4’-methylphenyl ketone with 2-methyl-N-propyl quinolinium iodide and 6-substituted-2-methyl-N-propyl quinolinium iodides in ethanolic DMF with piperidine catalyst. These colorants were shown to have uniform bathochromic shifts (BS) when compared to analogues with no substituent at β-phenyl nucleus or analogues having dimethine or tetramethine asy-cyanine colorants.