Stimuli-responsive azulene-based conjugated oligomers with polyaniline-like properties

Elizabeth Amir1, Roey J Amir, Luis M Campos

  • 1Materials Department, Materials Research Laboratory, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.

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Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

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.