“…1,2,4-Triazine-based compounds and their fused congeners have anticancer, antimicrobial, antifungal, anti-inflammatory, antimalarial, and antiviral properties [ 1 , 2 , 3 , 4 ]. Since 1,2,4-triazines fused with five-membered heterocycles are considered bio-isosteres with a purine core, these derivatives are the focus of drug design [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. However, 1,2,4-triazines possessing specific photophysical properties have seldom been used in optoelectrical research.…”