SYNTHESIS, SPECTROSCOPIC STUDIES AND FASTNESS PROPERTIES OF MONOAZO DYES DERIVED FROM SUBSTITUTED ARYLAMINES

  • J.C. Obi Department of Pure and Industrial Chemistry, Faculty of Physical Sciences, Chukwuemeka Odumegwu Ojukwu University Uli, Anambra State,
  • I.V. Emmanuel Department of Pure and Industrial Chemistry, Faculty of Physical Sciences, Chukwuemeka Odumegwu Ojukwu University Uli, Anambra State,
  • L.N. Okoro Department of Chemistry, Alex Ekwueme Federal University, Ndufu-Alike Ikwo, Ebonyi State,
  • A.O. Bolade Department of Petroleum Chemistry, American University of Nigeria, Yola, Adamawa State,
  • E.F. Onuh Department of Chemistry/ Biochemistry, Abia State Polytechnic, Aba, Abia State,
  • J.C. Ndulaka Department of Chemistry/ Biochemistry, Abia State Polytechnic, Aba, Abia State,

Abstract

Six monoazo dyes derived from arylamines substituted with bromine, chlorine and nitro groups were synthesized via diazo-coupling method and studied. Their functional groups were confirmed by an infra-red spectroscopy. Using solvents of different dielectric constants, the absorption spectra of these dyes showed positive solvatochromism with increasing solvent polarity. They also showed positive halochromism. The molar extinction coefficient of these dyes showed that they were all suitable for textile applications. More so, fastness tests revealed that all the dyes synthesized had better fastness properties on cotton fabric than on nyon 6,6.

Published
2022-03-30
Section
ARTICLES