title: Synthesis, structure and solvatochromic properties of some novel 5-arylazo-6-hydroxy-4-phenyl-3-cyano-2-pyridone dyes.
abstract: BACKGROUND
  A series of some novel arylazo pyridone dyes was synthesized from the corresponding diazonium salt and 6-hydroxy-4-phenyl-3-cyano-2-pyridone using a classical reaction for the synthesis of the azo compounds.
  
  
  RESULTS
  The structure of the dyes was confirmed by UV-vis, FT-IR, 1H NMR and 13C NMR spectroscopic techniques and elemental analysis. The solvatochromic behavior of the dyes was evaluated with respect to their visible absorption properties in various solvents.
  
  
  CONCLUSIONS
  The azo-hydrazone tautomeric equilibration was found to depend on the substituents as well as on the solvent. The geometry data of the investigated dyes were obtained using DFT quantum-chemical calculations. The obtained calculational results are in very good agreement with the experimental data.
authors: Department of Organic Chemistry, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P,O, Box 3503, 11120, Belgrade, Serbia. kavur@tmf.bg.ac.rs.
authors: Adel
authors: A
authors: Alimmari
authors: Dušan
authors: D
authors: Mijin
authors: Radovan
authors: R
authors: Vukićević
authors: Bojan
authors: B
authors: Božić
authors: Nataša
authors: N
authors: Valentić
authors: Vesna
authors: V
authors: Vitnik
authors: Zeljko
authors: Z
authors: Vitnik
authors: Gordana
authors: G
authors: Ušćumlić