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Synthesis and properties of bis(hetaryl)azo dyes

Mingxing Wang, Kazumasa Funabiki and Masaki Matsui*

*Department of Materials Science and Technology, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan, Email:

M. Wang, K. Funabiki, M. Matsui, Dyes and Pigments, 2003, 57, 77-86.

DOI: 10.1016/S0143-7208(03)00011-1


Unsymmetrical and symmetrical bis(hetaryl)azo dyes were prepared by diazotisation-coupling and oxidation reactions in moderate yields. Their absorption maxima were observed in the range of 427-631 nm, being more bathochromic than the corresponding non-hetarylazo derivatives.

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Key Words

Hetaryl azo compounds, UV-vis absorption spectrum, Solvatochromism, Thermostability, Photostability, Diazonium Salt, Diazotisation, Azo Coupling, Sodium Nitrite

ID: JXX-Y2003-170