Journal of Applied Chemical Science International

SYNTHESIS AND CHARACTERISTICS OF AZO PYRIDONE PIGMENTS, COMPLEXED WITH SOME TRANSITION METALS; CU(II), NI(II) AND CR(III)

MOHAMMED ABDULLAHI BABA *

Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria

MOHAMMED KABIR YAKUBU

Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria

KASALI ADEMOLA BELLO

Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria

HALIMA IDRIS UMARU

Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria

*Author to whom correspondence should be addressed.

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Abstract

Series of 3-(p-substituted phenyl)azo-6-pyridone dyes were synthesized, complexed using Copper, Nickel and Chromium metals into pigments, resulted into low solubility and increased in melting points. The dyes and their corresponding pigments have been characterized by, FTIR, GCMS and UV visible spectra. The electronic absorption of the complexes covers the λ_max range of 460 – 490 nm in acetone. The extinction coefficient of the dyes confirmed to be moderate ranging from 5.84 × 10⁴ – 7.54 × 10⁴ Lmol^-1cm^-1.

Keywords: Azopyridone dyes, pigment, elemental analysis, metal complex

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