The synthesis and photophysical studies of pyridinyl-1,2,4-triazine derivatives and use as a fluorescent sensor for ferric salts

A simple method is described for the efficient synthesis of bisaryl-3-pyridinyl-1,2,4-triazine derivatives via condensation of cinnamils with pyridine carboxtrisamidrazone in methanol under both conventional heating and microwave irradiation in high yield (85–66%). Photophysical analysis revealed that the derivatives displayed good fluorescent properties and bisaryl-3-pyrazine-1,2,4-triazine derivatives selectively bound Fe(III) ions.