Synthesis of new D-A-D type fluorophers based on aryl(hetaryl)substituted pyrimidines
DOI:
https://doi.org/10.7242/2658-705X/2022.3.3Keywords:
pyrimidine, D-A-D chromophores, fluorescence spectroscopy, cyclic voltammetry, HOMO/LUMOAbstract
New aryl(hetaryl)substituted pyrimidines were synthesized from 1,3-disubstituted chalcone obtained by aldol-crotonic condensation of 4-N,N-dimethylaminoacetophenone and 4-(dimethylamino)benzaldehyde in an alcoholic-alkaline medium at room temperature. The use of two different nucleophiles in the reaction with chalcone made it possible to obtain two new 2,4,6-trisubstituted pyrimidines containing either a 4-(9H-carbazol-9-yl)phenyl substituent or a pyrrole fragment in the second carbon position of the diazine ring. The structures of the compounds were confirmed by NMR and IR spectroscopy and elemental analysis. The thermal, optical and electrochemical properties of the synthesized pyrimidines were studied in this work. It has been proven that the compounds are characterized by a high glass transition temperature, as well as blue fluorescence. In addition, the presented structures have a narrow band gap and a deep level of the highest occupied molecular orbital.