Straightforward synthesis of diverse dipyrazolylmethane derivatives and their application for fluorescence sensing of Cu2+ ions was written by Kaliraj, Kaliappan;Xia, Likai;Edison, Thomas Nesakumar Jebakumar Immanuel;Lee, Yong Rok. And the article was included in RSC Advances in 2016.Reference of 628-13-7 This article mentions the following:
A variety of dipyrazolylmethane derivatives were synthesized from the reactions of readily available 灏?keto esters with arylhydrazine hydrochlorides and DMF in the presence of p-toluenesulfonic acid (p-TsOH). This methodol provides a concise and practical one-pot route for the construction of diverse dipyrazolylmethane derivatives in good yield. As an application, the synthesized nitro-substituted compound displayed an excellent turn-off fluorescence sensing property for the detection of Cu2+ ions. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Reference of 628-13-7).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Reference of 628-13-7