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A novel sensitive turn-on fluorescent Zn2+ chemosensor based on an easy to prepare C3-symmetric Schiff-base

Ying Zhou1, Zhan-Xian Li, Shuang-Quan Zang

  • 1The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China.

Organic Letters
|February 21, 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.