Novel Simple Cyanine, Carbocyanine, and Dicarbocyanine Dyes: Synthesis, Characterization and Application on Polyester Fabric

Abstract

Novel simple cyanine dyes, carbocyanine dyes and dicarbocyanine dyes derived from the nucleus 6-amino-3-methyl-1,2 diaza 4,13 dihydronaphthacene 5, 7, 12 trione (2) were prepared. The electronic visible absorption spectra of all the novel synthesized cyanine dyes were investigated in 95 % ethanol to evaluate their photosensitization characters and uses these dyes as photographic sensitizers in industry. The antimicrobial activity evaluation of mono, tri and pentamethine cyanine dyes against some bacterial and fungi strains( Escherichia coli, Staphylococcus aures, Aspergillus lavus and Candida albicans) was tested. The antimicrobial activity of the dyes usually increases when they give higher inhibition zone diameter against the tested bacterial and fungi strains. The dyeing process and fastness properities of the new synthesized cyanine dyes were examined on polyester fabric. Polyester is the hydrophobic fibres and usually dyed with cyanine dyes due to their high tinctorial strength and good fastness properties. The structural characterization of dyes carried out by elemental analysis, visible, mass spectroscopy, 1 H NMR and IR spectra.