67940-27-6

Basic information

• Product Name: 5-(4-carboxyphenyldiazenyl)-8-hydroxyquinoline
• Synonyms: 5-(4-carboxyphenyldiazenyl)-8-hydroxyquinoline
• CAS NO: 67940-27-6
• Molecular Weight: 293.282
• Mol File: 67940-27-6.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 5-(4-carboxyphenyldiazenyl)-8-hydroxyquinoline(CAS DataBase Reference)
• NIST Chemistry Reference: 5-(4-carboxyphenyldiazenyl)-8-hydroxyquinoline(67940-27-6)
• EPA Substance Registry System: 5-(4-carboxyphenyldiazenyl)-8-hydroxyquinoline(67940-27-6)

Safety Data

• Hazardous Substances Data: 67940-27-6(Hazardous Substances Data)

Upstream product

• 148-24-3 8-quinolinol 
• 17405-00-4 4-carboxybenzenediazonium chloride 
• 150-13-0 4-amino-benzoic acid 

Relevant articles and documents

Fluorescence chemosensors based on functionalized SBA-15 for detection of Pb2+ in aqueous media

A highly ordered mesoporous silica material (SBA-15) functionalized with 5-(4-carboxy-phenylazo)-8-hydroxyquinoline (CPA-8-HQL) for use as a fluorescence chemosensor for Pb2+ detection has been reported in this study. XRD, TEM, FT-IR, UV-vis diffuse reflectance spectra and TGA were used to characterize the grafting process. The results proved that CPA-8-HQL was successfully anchored into the channel of SBA-15 and that the primary ordered mesoporous structure of SBA-15 was well preserved. A fluorescence spectrophotometer was utilized to investigate the sensing properties, and a highly fluorescent enhancement at 429 nm was observed in the presence of Pb2+. Measurements of the sensitivity parameters demonstrated that the obtained organic/inorganic hybrid possessed excellent sensitivity and selectivity to Pb2+ in aqueous media. The lowest limit of detection was 4.90 × 10-7 mol L-1 for Pb2+.

Azo-8-hydroxyquinoline dyes: The synthesis, characterizations and determination of tautomeric properties of some new phenyl- and heteroarylazo-8-hydroxyquinolines

Two series of new heterocyclic and carbocyclic disperse azo dyes based on 8-hydroxyquinoline were prepared and characterized by FT-IR, 1H NMR, mass spectroscopic techniques and elemental analysis. Their solvatochromic properties in different solvents were investigated and their absorption spectra were strongly solvent dependent. The acid and base effects on this equilibrium were also examined. In addition, the colors of dyes were discussed with respect to the nature of the carbocyclic and heterocyclic rings and substituent therein. To determine the tautomeric forms of the prepared dyes in solid state, X-ray data for 5-(5-methylthiazol-2-yldiazenyl)-8-hydroxyquinoline were recorded. The X-ray results showed that the dye exists as an azo tautomer in the solid state.