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  • 标题:Study of Environment and pH Effects on the Spectral Behavior of Arylazobenzylidene Dyes
  • 本地全文:下载
  • 作者:Ghanadzadeh Gilani, A. ; Mohammadi, A. ; Riazi, M.
  • 期刊名称:Progress in Color, Colorants and Coatings
  • 印刷版ISSN:2008-2134
  • 电子版ISSN:2383-1790
  • 出版年度:2018
  • 卷号:11
  • 期号:2
  • 页码:69-78
  • 出版社:Institute for Color Science and Technology
  • 摘要:In this study, four arylazobenzylidene dyes (a-d) were synthesized with excellent yields in two steps using Knoevenagel condensation and azo-coupling reactions. Absorption spectra of these dyes with different substituents were investigated in organic solvents as a function of solvent polarity. The spectral features of synthesized arylazobenzylidene dyes were described according to azo-hydrazone tautomerism as well as the solvatochromic characteristic of the approved tautomer. The nature and degree of solute-solvent interactions were illustrated using Kamlet-Taft multi-parameter polarity scales. The effects of acid-base on the UV-visible absorption spectra of the dyes were reported. In addition, different absorption characteristics were observed for these dyes in pure diethanolamine.
  • 关键词:Arylazobenzylidene dye;Solvatochromism;Tautomerism;Substituent effect
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