Synthesis of novel photoluminescent pyridinium-betaine-type molecules was written by Hassoun, Ammar;Benchohra, Amina;Khaled, Omar;Seghouane, Dalila;Moussa, Jamal. And the article was included in Monatshefte fuer Chemie in 2020.Safety of Pyridin-4-ol This article mentions the following:
A series of pyridinium-betaine-like mols. has been reported; one family of mols. is built with a benzimidazole core and a second one with a pyrimidine moiety. The title compounds were prepared by mixing 2-chlorobenzimidazole or 2-bromopyrimidine with the corresponding pyridines (pyridine, 4-tert-butylpyridine, 4-hydroxypyridine, potassium pyridine-4-trifluoroborate, 4-dimethylaminopyridine) in acetonitrile or DMSO at high temperatures The novel compounds were characterized by spectroscopic methods. The UV-Vis and fluorescence features are reported as well. Preliminary photoluminescence results showed broadband emissions as common feature ascribed to the compounds containing benzimidazole ring. Some of the spectra nearly span over the whole visible spectral range, which pave the way to real opportunities to design single-component panchromatic emitters. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Safety of Pyridin-4-ol).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Safety of Pyridin-4-ol