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Synthesis and tautomeric structures of some novel thiophene-based bis-heterocyclic monoazo dyes

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dc.contributor.author Karci, F.
dc.date.accessioned 2019-08-16T12:40:58Z
dc.date.available 2019-08-16T12:40:58Z
dc.date.issued 2012
dc.identifier.issn 00222860 (ISSN)
dc.identifier.uri http://acikerisim.pau.edu.tr:8080/xmlui/handle/11499/8471
dc.description.abstract In this study, ethyl 2-amino-5-methyl-4-(phenylcarbamoyl)thiophene-3- carboxylate (1) was prepared using Gewald's methodology. This 2-aminothiophene derivative was diazotised and coupled with, 3-methyl-1H-pyrazolin-5-one, 3-methyl-1-phenylpyrazolin-5-one, 3-amino-5-hydroxy-1H-pyrazole, 3-amino-5-hydroxy-1-phenylpyrazole, 3-cyano-6-hydroxy-4-methyl-2-pyridone, barbituric acid and 4-hydroxycoumarin, respectively (2-8). The newly synthesized bis-heterocyclic monoazo dyes based on thiophene ring were characterised by elemental analysis and spectral methods. The solvatochromic behaviour and tautomeric structures of these bis-heterocyclic monoazo dyes in various solvents was evaluated. Acid and base effects on the visible absorption maxima of the dyes are also reported. © 2012 Elsevier B.V. All rights reserved.
dc.language.iso English
dc.relation.isversionof 10.1016/j.molstruc.2012.05.021
dc.subject Absorption spectra
dc.subject Aminothiophene
dc.subject Azo dyes
dc.subject Gewald's methodology
dc.subject Tautomerism
dc.subject 4-Hydroxycoumarin
dc.subject Barbituric acid
dc.subject Base effect
dc.subject Monoazo dyes
dc.subject Solvatochromic
dc.subject Spectral methods
dc.subject Tautomeric structures
dc.subject Thiophene ring
dc.subject Visible absorption maxima
dc.subject Carboxylation
dc.subject Complexation
dc.subject Organic compounds
dc.subject Thiophene
dc.subject Synthesis (chemical)
dc.title Synthesis and tautomeric structures of some novel thiophene-based bis-heterocyclic monoazo dyes
dc.type Article
dc.relation.journal Journal of Molecular Structure
dc.identifier.volume 1024
dc.identifier.startpage 117
dc.identifier.endpage 122
dc.identifier.index Scopus


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