通过交叉偶联和氧化偶联反应合成了一系列烷基取代的聚噻吩并[3,2- b ]噻吩。通过紫外可见吸收和荧光光谱研究了它们的电子性质。与通过FeCl 3制备的区域无规聚合物相比,通过差速官能化单体的斯蒂勒偶联制备的聚(3-壬基噻吩并[3,2- b ]噻吩)表现出更长的吸收λmax和相应的更低的光学带隙。方法或通过熊田耦合。使用二烷基取代的单体生产聚(3,6-二壬基噻吩并[3,2- b[噻吩]导致吸收光谱和发射光谱都急剧转移到较短的波长。通过循环伏安法研究了这些聚合物的电化学,发现与二烷基取代的聚合物相比,单烷基取代的聚合物具有相对较低的氧化电位。为了研究聚合物主链中单体的构象,制备了这些聚合物的二聚亚基。紫外可见光谱和计算都表明,头对尾的连接引起相邻环单元的小畸变,而头对头的连接导致共轭的减小。
通过交叉偶联和氧化偶联反应合成了一系列烷基取代的聚噻吩并[3,2- b ]噻吩。通过紫外可见吸收和荧光光谱研究了它们的电子性质。与通过FeCl 3制备的区域无规聚合物相比,通过差速官能化单体的斯蒂勒偶联制备的聚(3-壬基噻吩并[3,2- b ]噻吩)表现出更长的吸收λmax和相应的更低的光学带隙。方法或通过熊田耦合。使用二烷基取代的单体生产聚(3,6-二壬基噻吩并[3,2- b[噻吩]导致吸收光谱和发射光谱都急剧转移到较短的波长。通过循环伏安法研究了这些聚合物的电化学,发现与二烷基取代的聚合物相比,单烷基取代的聚合物具有相对较低的氧化电位。为了研究聚合物主链中单体的构象,制备了这些聚合物的二聚亚基。紫外可见光谱和计算都表明,头对尾的连接引起相邻环单元的小畸变,而头对头的连接导致共轭的减小。
A series of new substituted triphenylamine (TPA) derivatives with alkyl thieno[3,2-b]thiophene and thiophene units were synthesized in a combinatorial manner. Suzuki coupling of a dioxaborolane TPA derivative and 2-bromo-3-nonylthieno[3,2-b]thiophene or Stille coupling of fresh stannyl thieno[3,2-b]thiophene was used. All compounds were characterized by H-1 and C-13 NMR, HRMS, UV-vis spectrometry and DSC measurements. It was demonstrated that the optical and thermal properties of these materials can be tuned by varying both the conjugation length and thienothiophene and thiophene combination on the TPA branches. Moreover, the measured molar extinction coefficients were increasing from 63,000 (lambda(max) = 354 nm) to 131,000 L mol(-1) cm(-1) (lambda(max) = 428 nm) for TPA-thienothiophenes and TPA-bithiophene thienothiophenes, respectively. Some of them showed molecular glass behavior. (C) 2010 Elsevier Ltd. All rights reserved.