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A novel squarylium dye for monitoring oxidative processes in lipid membranes

Valeriya M Trusova1, Galyna P Gorbenko, Todor Deligeorgiev

  • 1Department of Biological and Medical Physics, V.N. Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine. valtrusova@yahoo.com

Journal of Fluorescence
|June 11, 2009
PubMed

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.