Fluorescent trifluoromethylated imidazo[1,5-a]pyridines and their application in luminescent down-shifting conversion was written by Volpi, G.;Galliano, S.;Buscaino, R.;Viscardi, G.;Barolo, C.. And the article was included in Journal of Luminescence in 2022.COA of Formula: C12H9NO This article mentions the following:
In the last few years, imidazo[1,5-a]pyridine derivatives have attracted growing attention due to their unique optical behaviors. Herein, a series of trifluoromethylated substituted imidazo[1,5-a]pyridine derivatives were synthesized and their optical properties investigated. Depending on the position of the trifluoromethylated substituents on the imidazo[1,5-a]pyridine nucleus, we were able to tune the quantum yields (Φ) both in acetonitrile solution (from 13% to 39%) and in the polymeric matrix (10%-58%) with a remarkable large Stokes shift. The investigated fluorophores were dispersed in a transparent polyurethane resin, providing a possible luminescent low-cost material for down-shifting conversion. An anal. based on the chem. structures and spectroscopic data, both in solution and polymeric medium, is reported to address the best strategies to optimize the photophys. properties and prevent aggregation. Finally, optimized polyurethane-based films prepared with compounds 2 and 3 were tested as a luminescent coating on a com. photodiode, enabling their technol. application. In the experiment, the researchers used many compounds, for example, Phenyl(pyridin-2-yl)methanone (cas: 91-02-1COA of Formula: C12H9NO).
Phenyl(pyridin-2-yl)methanone (cas: 91-02-1) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.COA of Formula: C12H9NO