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New hyperbranched polytriazoles containing isolation chromophore moieties derived from AB4 monomers through click

Wenbo Wu1, Cheng Ye, Gui Yu

  • 1Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072, PR China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 25, 2012
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.