Synthesis and dyeing performance of some amphiphilic naphthalimide azo disperse dyes on polyester fabrics

Umar Salami Ameuru, Mohammed Kabir Yakubu, Kasali Ademola Bello, Peter Obinna Nkeonye, Azim Ziyaei Halimehjani


A series of monoazo disperse dyes were synthesized by coupling diazotized 4-amino-N-dodecyl-1, 8-naphthalimide with N,N-dialkyl anilines and naphthol derivatives. The synthesized intermediates and the dyes were characterized by the use of FT-IR, 1H-NMR, 13C-NMR, mass spectroscopy and elemental analysis (CHN). Visible absorption spectra of the dyes were examined in solvents of different polarities. The electronic absorption spectra cover a wavelength (λmax) range of 515-535 nm in DMF at uniformly absorption intensity between 1.59 - 3.00×104 l mol-1 cm-1. The dyes gave deep and bright intense hues of light violet, maroon, pink and neon red on polyester fabrics. The dyes generally showed good washing and perspiration rating but poor to moderate light fastness properties on polyester woven fabric and can be recommended for commercial outlets.


1,8-naphthalimide derivatives; Azo dyes; solvatochromic effects; naphthols; fastness properties

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