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Novel mono- and bis-azo dyes containing the azulen-1-yl moiety: Synthesis, characterization, electronic spectra and basicity

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Alexandru C. Razus, Liviu Birzan, Mihaela Cristea, Victorita Tecuceanu, Liliana Blanariu and Cristian Enache

Editorial: Elsevier-UK, Dyes Pigm., 80(3), p.337-342, 2009.

Rezumat:

3- and 4-[(Azulen-1-yl)-azo]-azo-benzenes were obtained in good yields using the buffered coupling reaction between several alkyl-substituted azulenes and diazotized phenylazo-phenylamines in dichloroacetic acid. The coupling products were characterized and the recorded electronic spectra are discussed. The isosbestic points obtained by protonation enabled the determination of their pKa values.

Cuvinte cheie: Azulene; Azo; Diazene; Electronic spectra; Basicity