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- W1977627974 abstract "Purpose – The purpose of this paper is to synthesise, characterise and find out properties of some new arylazopyridone disperse dyes, bearing different substituents on coupling component of the dyes.Design/methodology/approach – The dyes are synthesised by diazotisation, coupling and cyclization reactions, starting from various aryldiazonium salts and different β‐diketoesters followed by condensation with cyanoacetamide. The structures of these dyes are characterised and confirmed by melting point, elemental analysis, infrared, ultraviolet‐visible spectroscopy (UV/VIS) and nuclear magnetic resonance (1H‐NMR) data. Their absorption properties in different solvents are also investigated.Findings – The wavelength of maximum absorptions, molar extinction coefficients are strongly dependent on the electron donating ability of the substituents on the coupling moiety. The absorption bands of these dyes move towards longer wavelength as the polarity of the solvents and electron density of substituents on the coup..." @default.
- W1977627974 created "2016-06-24" @default.
- W1977627974 creator A5034030340 @default.
- W1977627974 date "2009-09-11" @default.
- W1977627974 modified "2023-09-25" @default.
- W1977627974 title "Synthesis and characterisation of some new arylazopyridone dyes" @default.
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- W1977627974 doi "https://doi.org/10.1108/03699420910988778" @default.
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