A new fluoride ion colorimetric sensor based on azo–azomethine receptors
作者:Raziyeh Arabahmadi、Saeid Amani
DOI:10.1080/10610278.2013.833334
日期:2014.6.3
of differing polarity and their chromogenic behaviours towards various anions. The sensors showed a colour change upon addition of fluoride ion with a substantial bathochromicshift. No significant colour changes was observed upon addition of any other anions. The significant changes of absorption bands and colour show that chemosensor was selective towards fluoride ion over other anions such that Cl−
Synthesis and Identification of Some New 2,3-Disubstituted 1,3-Oxazepine-4,7-dione Derivatives Containing Azo Group and 1,3,4-Thiadiazole Moiety
作者:Zeid Hassan Abood、Murtadha Mohammed Hussein、Ihsan Mahdi Shaheed
DOI:10.14233/ajchem.2015.18879
日期:——
Azoaldehyde derivatives (1a-f) were prepared through coupling reactions between diazonium salts of six primary aromatic amines and alkaline solution of 2-hydroxy benzaldehyde. Compounds (1a-f) were then introduced in acid-catalyzed condensation reactions with 2-amino-5-mercapto-1,3,4-thiadiazole to obtain six new azoimines (2a-f). (2+5) Cycloaddition of (2a-f) with each maleic and phthalic anhydrides respectivily gave nine new oxazepines (3a-f) and (4b, 4d, 4e). The synthesized compounds might have some biological activity.