Synthesis, spectral properties, biological activity and application of new 4-(benzyloxy)phenol derived azo dyes for polyester fiber dyeing

摘要

A series of hetaryl-azophenol dyes were prepared by coupling 4-benzyloxyphenol with eight heterocyclic amines in nitrosyl sulphuric acid. The structure of the prepared azo dyes was characterized by UV-Vis, FT-IR and 1~H-NMR spectroscopic techniques, as well as elemental analysis (CHN). The solvatochromism of dyes was evaluated with respect to the wavelength of maximum absorption (λmax) in various solvents. The effects of temperature, concentration as well as acid and base on the visible absorption maxima are also reported. The newly synthesized dyes were screened for their potential antibacterial activities against four bacterial species and the results revealed significant activity against the test microorganisms in vitro. In addition, the dyes were applied to polyesters and afforded red-orange shades with excellent wash fastness properties.