作者:Alison M. Funston、Eric E. Silverman、John R. Miller、Kirk S. Schanze
DOI:10.1021/jp0364396
日期:2004.2.1
Two poly(arylene ethynylene)s (PAEs) that are end-capped with α-terthiophene (T3) groups were prepared and structurally characterized by proton NMR, GPC, and optical spectroscopy. One of the polymers (T3PPE13) features a backbone structure that alternates phenylene ethynylene and bis(alkoxy)phenylene ethynylene repeat units. The second T3 end-capped polymer (T3PBpE12) features an alternating structure
制备了两种用 α-三噻吩 (T3) 基团封端的聚 (亚芳基乙炔基) (PAE),并通过质子 NMR、GPC 和光学光谱对其结构进行了表征。其中一种聚合物 (T3PPE13) 具有交替亚苯基亚乙炔基和双(烷氧基)亚苯基亚乙炔基重复单元的主链结构。第二种 T3 封端聚合物 (T3PBpE12) 具有交替结构,具有亚联苯乙炔基和双(烷氧基)亚苯基亚乙炔基重复序列。T3 封端聚合物的吸收光谱与缺少 T3 端基的相应“母体聚合物”(分别为 PPE164 和 PBpE21)的吸收光谱几乎相同。相比之下,虽然母体聚合物的荧光光谱主要是蓝色荧光,λmax = 425 nm,封端聚合物的发射光谱包含显着的绿色荧光贡献(λ = 500-550 nm)。这表明单线态激子被 T3 端基有效捕获。脉冲放射分解研究...