《Optical detection of cyanide by palladium(II)-dithiazolopyridine probe at the parts per billion level》 was written by Ebadinia, Leila; Darabi, Hossein Reza; Ramazani, Ali. Quality Control of 2,6-Diaminopyridine And the article was included in Phosphorus, Sulfur and Silicon and the Related Elements in 2020. The article conveys some information:
The ensemble of 2,6-bis(2-chlorophenyl)dithiazolo[4,5-b:5′,4′-e]pyridine with Pd2+ ions (•Pd2+) was prepared for the detection of cyanide ions (CN-) in 50% aqueous methanol. Among the tested metal ions, only Pd2+ sensitively induced the red shift of the absorption bands and the complete decrease of fluorescence emission. The detection limit toward Pd2+ was 2 ppb. The ensemble •Pd2+ selectively and rapidly detected a low concentration of cyanide ions by a colorimetric change (40 ppb) as well as a “”turn-on”” fluorescent response (5 ppb). Job’s plot revealed the complex formation with 1:1 stoichiometry. The binding and replacement mode of •Pd2+ and CN- were also confirmed by 1H NMR titrations and IR anal. In general, a fast and selective recognition of CN- is reported. In the experiment, the researchers used 2,6-Diaminopyridine(cas: 141-86-6Quality Control of 2,6-Diaminopyridine)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Quality Control of 2,6-Diaminopyridine