A novel mesogen-jacketed liquid crystalline electroluminescent polymer with both thiophene and oxadiazole in conjugated side chain
作者:Qian Yang、Yiding Xu、Hao Jin、Zhihao Shen、Xiaofang Chen、Dechun Zou、Xinghe Fan、Qifeng Zhou
DOI:10.1002/pola.23908
日期:2010.4.1
Mesogen‐jacketed liquid crystalline polymers (MJLCPs) with both electron‐transport oxadiazole and hole‐transport thiophene in the side chain were reported for their promising electroluminescent property. Monomers of 2,5‐bis5‐[(4‐alkoxyphenyl)‐1,3,4‐oxadiazole]thiophen‐2‐yl}styrene (M‐Cm, m is the number of the carbons in the alkoxy groups, m = 8,10) were synthesized and confirmed by 1H‐NMR, mass spectrometry
据报道,在侧链上同时带有电子传输的恶二唑和空穴传输的噻吩的介晶夹层液晶聚合物(MJLCPs)具有良好的电致发光性能。2,5-双5-[(4-烷氧基苯基)-1,3,4-恶二唑]噻吩-2-基}苯乙烯的单体(MC- m,m是烷氧基中的碳原子数,m = 8,10)合成并通过1确认H-NMR,质谱和元素分析。成功获得了相应的聚合物,并通过热分析,光谱学,循环伏安法,电致发光分析,偏光显微镜(PLM)和广角X射线衍射(WAXD)对其进行了表征。聚合物表现出高达382°C的高分解温度和高T g达到184°C。吸收光谱表明,单体和聚合物在薄膜中的聚集都比溶液中的少,并且与单体相比,聚合物的吸收光谱显示出明显的蓝移。单体和聚合物均发出蓝绿色光,薄膜中聚合物的光致发光光谱表明形成了受激准分子或激基复合物。与以前报道的含恶二唑单元的MJLCP相比,该聚合物显示出较低的HOMO能级和LUMO能级。使用ITO / PEDOT