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.
(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
. "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
(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
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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