Crystallographic study of two monoazo disperse dyes with a D-π-A system

2015 ◽  
Vol 131 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Min Li ◽  
Kai Zhang ◽  
Aiqin Hou
Keyword(s):  
Disperse Dyes ◽  
Crystallographic Study ◽  
Monoazo Disperse Dyes

Photofading of monoazo disperse dyes on polyester and polyamide substrates

2000 ◽  
Vol 45 (2) ◽  
pp. 109-123 ◽  
Author(s):  
Kiyoshi Himeno ◽  
Yasuyo Okada ◽  
Zenzo Morita
Keyword(s):  
Disperse Dyes ◽  
Monoazo Disperse Dyes

Photostability of Monoazo Disperse Dyes in Different Solvents

2013 ◽  
Vol 834-836 ◽  
pp. 472-475
Author(s):  
Narumol Ittarat ◽  
Potjanart Suwanruji ◽  
Thitinun Karpkird ◽  
Jantip Setthayanond
Keyword(s):  
Melting Point ◽  
Visible Light ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Initial Value ◽  
Methyl Group ◽  
H Nmr ◽  
Monoazo Disperse Dyes

Twelve monoazo disperse dyes were synthesized and then characterized by melting point (m.p.) measurement, elemental analysis and1H-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 R1group on the diazo component increased the photostability in order of H˃CN˃Cl. The photostability of the dye was also higher when R2group on the coupling component was a methyl group.

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