用三苯基4-乙烯基苄基氯化季膦盐和三种芳醛的Wittig反应合成了具有二苯乙烯类侧链的三种苯乙烯衍生物:4-乙烯基二苯乙烯(VS),4’-N,N-二甲氨1基-4-乙烯基二苯乙烯(DMAVS)和4-(2-(9-蒽基))-乙烯基苯乙烯(AVS)。这三种物质都具有良好的光致发光性能,随取代基的不同,光致发光光谱的最大发射位置从375到530nm,强度也随着共轭程度的加大和推电子基团的引入而大幅度增强。
A series of styrene derivatives with stilbene-like pendant were synthesized through heterogeneous Wittig reaction of triphenyl-(4-vinyl)-benzylphosphornium chloride with aromatic aldehydes. The substituted styrenic monomer, 4-(2-aryl)-vinyl-styrene, was strongly photoluminescent in solution and in solid state. Introduced electron-pushing substituents and lengthened conjugation both enhanced the emission intensity and led to a red shift of emission bands, with the maximum emission wavelength shifted from 378 to 494 nm. The fluorescece quantum efficiencies were determined by employing quinine sulfate as reference; and 4-(2-anthryl)-vinyl-styrene (AVS) possessed the highest quantum efficiency(λ=494 nm, Фf=0.635).