期刊
JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
卷 75, 期 8, 页码 1019-1032出版社
SERBIAN CHEMICAL SOC
DOI: 10.2298/JSC091009074A
关键词
arylazo pyridone dyes; absorption spectra; solvent effect; substituent effect; tautomeric equilibration
资金
- Ministry of Science and Technological Development of the Republic of Serbia [142063]
A series of some new pyridone arylazo dyes was synthesized from the corresponding diazonium salts and 3-cyano-4,6-diphenyl-2-pyridone using the classical reaction for the synthesis of the azo compounds. The structures of these dyes were confirmed by UV-Vis, FT-IR and H-1-NMR spectroscopic techniques. The solvatochromism of the dyes was evaluated with respect to visible absorption properties in various solvents. The effects of solvent dipolarity/polarizability and solvent/solute hydrogen bonding interactions were analyzed by means of the linear solvation energy relationship concept proposed by Kamlet and Taft. The 2-pyridone/2-hydroxypiridine tautomeric equilibration was found to depend on the substituents as well as on the solvents.
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