Synthesis, characterization, and polyester dyeing performance of azo barbituric and thiobarbituric acid disperse dyes.

ABSTRACT: This study explores the synthesis, characterization, and application of 23 azo disperse dyes synthesized based on barbituric and thiobarbituric acid derivatives for polyester coloration. The dyes were synthesized via the coupling of diazotized aniline derivatives with barbituric and thiobarbituric acid derivatives. The structures of these synthesized dyes are assigned using FT-IR and¹H NMR spectroscopy. UV-Vis spectroscopy revealed absorption maxima ranging from 360 to 440 nm, with good correlation between experimental and theoretical values calculated using TD-DFT. The dyes exhibited significant pH-dependent spectral shifts, demonstrating potential as pH indicators. Application to polyester fabrics showed excellent wash fastness (rating 5) for all dyes, with varying results for

SUBMITTER: El-Rahman MA 

PROVIDER: S-EPMC12008282 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature