Synthesis and Application of Triphenylamine Dyes on Chrome and Vegetable Tanned Leather

Abraham Danladi Adams, Bukar P. H., Agho B. O., Enyeribe C., Obadahun J., Magaji I.

Abstract


P-phenylenediamine, H-acid, and 3-aminobenzoic acid were used to create a triphenylamine dye that was labeled AD1, AD2, and AD3. The intermediate, p-phenylenediamine, H-acid, and 3-aminobenzoic acid melting points of the synthesized dyes were found to be 250°C, 295°C, 342.6°C, and 155°C, respectively. The greatest absorption wavelength fell between 380 and 500 nm. The IR spectra of the synthesized dyes also revealed an absorption peak in the range of 1690–1590 cm-1 for the intermediate, 1650–1550 cm-1 for the NH bent in AD1, 1420–1370 cm-1 for organic sulphates in AD2, and 1680–1630 cm-1 for the C=O amide in AD3. Additionally, the GC-MS analysis of the dyes revealed molecular ion peaks for ADI, AD1, AD2, and AD3 at m/z of 273.1, 344.0, 563.0, and 340.5, respectively, which are consistent with the molecular formula of the dyes. The 1H NMR spectra of the synthesized dye displayed splitting patterns that indicate the existence of protons with aromatic, methanolic, methylene, sulfide, and phenolic functions. On leather that had been vegetable and chrome tanned, the synthetic dyes were used.  When applied to the leather, the dyes produced pink, dark red, brown, and dark brown hues with brighter and deeper tints, outstanding levelness, and tinctorial strength. Additionally, they provided good to excellent rub and light fastness on both chrome and vegetable tanned leather.  Based on the findings, it can be said that both chrome and vegetable-tanned leather can be dyed using AD1, AD2 and AD3 dye.


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