Abdel-latif, E., Mansour, A., Abdel-Galil, E. (2018). Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes. Journal of Textiles, Coloration and Polymer Science, 15(1), 1-13. doi: 10.21608/jtcps.2018.4327.1000
Ehab Abdel-latif; Asmaa Mansour; Ebrahim Abdel-Galil. "Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes". Journal of Textiles, Coloration and Polymer Science, 15, 1, 2018, 1-13. doi: 10.21608/jtcps.2018.4327.1000
Abdel-latif, E., Mansour, A., Abdel-Galil, E. (2018). 'Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes', Journal of Textiles, Coloration and Polymer Science, 15(1), pp. 1-13. doi: 10.21608/jtcps.2018.4327.1000
Abdel-latif, E., Mansour, A., Abdel-Galil, E. Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes. Journal of Textiles, Coloration and Polymer Science, 2018; 15(1): 1-13. doi: 10.21608/jtcps.2018.4327.1000
Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes
2Chemistry Department, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
Receive Date: 06 July 2018,
Revise Date: 21 July 2018,
Accept Date: 30 July 2018
Abstract
Facile synthesis of various thienylazo-thiazole and thienylazo-thiophene dyes were described. 2-Amino-5-(2-thienylazo)-thiazole dyes 5 and 6 have been constructed by coupling the diazotized 2-aminothiophenes 1a and/or 1b with 2-amino-4-phenylthiazole (3) and/or 2-(N-methylamino)-4-phenylthiazole (4). Coupling of 2-aminothiophene derivative 1a with 2-acetyl-3-oxo-N-phenylbutanethioamide (7) affected cleavage of one acetyl group to furnish the corresponding 2-acetyl-2-thienylazo-thioacetanilide dye 8 which has been utilized as a precursor for the construction of different 3-methyl-2-substituted-4-thienylazo-thiophenes 10-13 through its treatment with the appropriate alpha-chlorinated reagents (namely; MeCOCH2Cl, PhCOCH2Cl, ClCH2COOEt and ClCH2CN). The effect of solvent polarity on absorption spectra was investigated, as was the relationship between dye structures and absorption in the UV–visible region.
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