Photostability of Monoazo Disperse Dyes in Different Solvents

Narumol Ittarat; Potjanart Suwanruji; Thitinun Karpkird; Jantip Setthayanond

doi:10.4028/www.scientific.net/AMR.834-836.472

Paper Titles

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Effects of Catalyst on the Transmittance and Stability of SiO₂ Antireflective Film Prepared by Sol-Gel Method
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Morphology and Electrochemical Performance of Amorphous Nickel Hydroxide Added Anion
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Photostability of Monoazo Disperse Dyes in Different Solvents
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Methanol Conversion to Propylene over Mo-HZSM-5 Zeolite
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Application of Dividing Wall Column in High Purity Cyclohexene Oxide Distillation
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Crystal Structure of Biammonium Hexamolybdonickelate (II) Hydrate, (NH₄)₂(NiMo₆O₂₄)(H₃O)₆
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Study on a Structure of 2,6-Pyridine-Dicarboxylic Acid Europium Quarthydrate
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Photostability of Monoazo Disperse Dyes in Different Solvents

Abstract:

Twelve monoazo disperse dyes were synthesized and then characterized by melting point (m.p.) measurement, elemental analysis and ¹H-NMR. The photostability of monoazo disperse dyes in solvents with different polarities was evaluated thereafter the dyes in each solvent were irradiated with visible light for 8 hours. The percentage of photostability of the dye decreased from the initial value in the range of 5-10%. The photostability was affected by the substituted group of the dyes regardless of the solvent used. Different R₁ group on the diazo component increased the photostability in order of H˃CN˃Cl. The photostability of the dye was also higher when R₂ group on the coupling component was a methyl group.