Spectral luminescent properties of 5-(2-hydroxyphenyl)-3-ethyl-1-(pyridin-2-yl)-1Н-1,2,4-triazole and its Be(II) complex

Abstract

The interaction of 4-oxo-1,3-benzoxazinium perchlorate with 2-pyridylhydrazine has given 5-(2-hydroxyphenyl)-3-ethyl-1-(pyridin-2-yl)-1Н-1,2,4-triazole (L). Boiling of the latter in methanol with 0.5 equiv of beryllium sulfate tetrahydrate has afforded the L₂Be metal complex. In contrast to the starting triazole, its beryllium complex exhibits strong violet luminescence (λ_max^fl = 431–434 nm, φ = 0.56–0.64).