in o-xylene. The obtained oxadiazoles, except for 2-(2-hydroxyphenyl)-5-methyl-1,3,4-oxadiazole, luminesce with a high quantum yield in polar and nonpolar solvents (λflmax = 300-339 nm, ϕ = 0.11–0.63). 2-(2-Hydroxyphenyl)-5methyl-1,3,4-oxadiazole emits intensely only in highly polar aprotic DMSO (λflmax = 346 nm, φ = 0.15), whereas its chelate complex with ZnII luminesces in all solvents with a high
2-Aryl-5-methyl-1,3,4-oxadiazoles 通过等摩尔量的酰基酰
肼与
原乙酸三乙酯在
邻二甲苯中回流合成。除 2-(2-羟基苯基)-5-甲基-1,3,4-恶二唑外,所得恶二唑在极性和非极性溶剂中以高量子产率发光(λflmax = 300-339 nm,φ = 0.11-0.63 )。2-(2-Hydroxyphenyl)-5methyl-1,3,4-oxadiazole 仅在高极性非质子
DMSO (λflmax = 346 nm, φ = 0.15) 中强烈发射,而其与 ZnII 的螯合物在所有溶剂中均以高量子发光在可见光谱的较长波长范围内产生(λflmax = 413–419 nm,φ = 0.36–0.55)。