A facile synthesis of various (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes 4a-e was described through heterocyclization of the precursor 2-arylazo-2-acetyl-thioacetanilides 3 with 5-bromo-2-(bromoacetyl)-thiophene. The effect of solvent polarity on absorption spectra was investigated, as was the relationship between dye structures and absorption in the UV–visible region. The absorption maxima of the tested arylazo-thiophene dyes ranged from 464 to 490 nm in ethanol, from 484 to 492 nm in DMF and from 494 to 496 nm in acetone.
El-Shafeai, H. M., . Ismail, M. A., & Abdel-Latif, E. (2019). Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes. Mansoura Journal of Chemistry, 46(4), 12-15. doi: 10.21608/mjcc.2019.413045
MLA
Heba M. El-Shafeai; Mohamed A . Ismail; Ehab Abdel-Latif. "Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes", Mansoura Journal of Chemistry, 46, 4, 2019, 12-15. doi: 10.21608/mjcc.2019.413045
HARVARD
El-Shafeai, H. M., . Ismail, M. A., Abdel-Latif, E. (2019). 'Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes', Mansoura Journal of Chemistry, 46(4), pp. 12-15. doi: 10.21608/mjcc.2019.413045
VANCOUVER
El-Shafeai, H. M., . Ismail, M. A., Abdel-Latif, E. Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes. Mansoura Journal of Chemistry, 2019; 46(4): 12-15. doi: 10.21608/mjcc.2019.413045
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