文章基本信息

标题：Study of Environment and pH Effects on the Spectral Behavior of Arylazobenzylidene Dyes
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作者：Ghanadzadeh Gilani, A. ; Mohammadi, A. ; Riazi, M. 等
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