Synthesis and crystal structures of two hetarylazo indole disperse dyes |
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Authors: | Zeynel Seferoğlu Nesrin Tokay Tuncer Hökelek Ertan Şahin |
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Institution: | (1) Department of Chemistry, Gazi University, 06500, Teknikokullar, Ankara, Turkey;(2) Department of Chemistry, Hacettepe University, 06800, Beytepe, Ankara, Turkey;(3) Department of Physics, Hacettepe University, 06800, Beytepe, Ankara, Turkey;(4) Department of Chemistry, Atatürk University, 22240 Erzurum, Turkey |
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Abstract: | Two new heterocyclic monoazo disperse dyes were prepared by diazotizing 2-amino-5-methylthiazole and ethyl-1-(2-aminothiazol-4-yl)acetate
and coupling with 1,2-dimethyl-indole. Characterization of the dyes was carried out by using UV–vis, FTIR, 1H-NMR and MS spectroscopic techniques. The structures of the dyes have been determined by single-crystal X-ray diffraction
method. The maximum absorption peaks (λmax) in the ultraviolet and visible (UV–vis) spectra of the hetarylazoindole dyes have been determined by using the density-functional
(DFT method) and time-dependent density-functional (TD-DFT method) theories. Excellent agreement was found between the calculated
and experimental λmax values. |
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Keywords: | Hetarylazo Disperse dyes Crystal structure Absorption spectrum |
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