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Novel Hemicyanine and Aza-Hemicyanine Dyes: Synthesis, Spectral Investigation and Antimicrobial Evaluation
Authors: H. A. Shindy, A. K. Khalafalla, M. M. Goma, A. H. Eed
Number of views: 425
Novel hemicyanine dyes and aza-hemicyanine dyes having the nucleus of furo[(3,2-d)pyrazolium; ( )imidazol] iodide salt were prepared. The electronic visible absorption spectra of all the synthesized hemicyanine dyes and aza-hemicyanine dyes were investigated and in 95 % ethanol solution to evaluate their spectral characterization. The antimicrobial effects of some selected dyes were tested against various bacterial and fungal strains (Escherichia coli, Staphylococcus aureus, Aspergillus flavus and Candida albicans) to assess their antimicrobial (bactericidal and fungicidal) properties. The results discussed in this study revealed that both the spectral characterization and the antimicrobial properties of the examined dyes is highly effected by the type of the X substituted in the phenyl ring system for the hemicyanine dyes and by the type of the phenyl and/or the naphthyl ring system for the aza-hemicyanine dyes. Structural confirmations were identified by elemental analysis, visible spectra, IR and 1H NMR spectroscopic data.