作者:Kazuhiro Nakabayashi、Yuhei Takeuchi、Hideharu Mori
DOI:10.1246/bcsj.20160178
日期:2016.9.15
We developed a series of perylene bisimide (PBI)-based small molecules with donor–acceptor (D–A) architecture (PBI1, PBI2, and PBI3). By tuning the D–A architecture, intramolecular charge transfer (ICT) could be controlled; as a result, optical band gaps and HOMO levels of PBI1–3 were widely tunable from 1.83 to 1.44 eV and from −5.85 to −5.55 eV, respectively. Furthermore, extremely wide light absorption over 900 nm was observed in the thermal annealed PBI1–3 blend film. The grazing incidence wide angle X-ray scattering (GIWAXS) analysis demonstrated that the as-spun PBI2 thin film had the highest ordered nanostructure among PBI1–3, in which diffraction corresponding to π–π stacking was clearly observed in isotropic orientations.
Synthesis and Characterization of a New Poly(octathiophene) Based Copolymer for Organic Thin-Film Transistor
作者:Hui-Jun Yun、Jong-Man Park、Chan Woo Jeon、Sang Yong Nam、Sung-Chul Shin、Jaeyoung Hwang、Yun-Hi Kim
DOI:10.1166/jnn.2014.8806
日期:2014.8.1
A new poly(octathiophene) based copolymer was designed and synthesized by the palladium catalyzed Suzuki coupling reaction. The structure of the newly obtained copolymer was confirmed by 1H-NMR and IR. The number-average molecular weight (M(n)) of the polymer was 36,000 with a poly-dispersity index of 1.15. The polymer has good solubility in common solvents such as chloroform, toluene, chlorobenzene
通过钯催化的Suzuki偶联反应,设计合成了一种新型的聚(八噻吩)基共聚物。新获得的共聚物的结构通过1 H-NMR和IR确认。聚合物的数均分子量(M(n))为36,000,多分散指数为1.15。该聚合物在室温下对常见溶剂(如氯仿,甲苯,氯苯,二氯苯和四氢呋喃)具有良好的溶解性。分别通过紫外可见吸收,TGA和DSC以及循环伏安法表征了聚合物的光学,热和电化学性能。发现使用这种新聚合物作为有机半导体的薄膜晶体管表现出典型的p沟道FET特性,其空穴迁移率为5 x 10(-4)cm2 / Vs。
Synthesis and electronic properties of three swivel-cruciform oligothiophene dimers—bis(terthiophene) (BT3), bis(pentathiophene) (BT5) and bis(heptathiophene) (BT7)—with increased solubility in organic solvents are reported. We obtained a field-effect mobility of 3.7 × 10−5 cm2 V−1 s−1 and a current on/off ratio of >103 for a solution-processed OFET device with dimer BT5 as p-type semiconductor.
A systematic study of substituent electronic effects on a number of oligothiophene properties was performed using well‐defined oligothiophenes of various chain lengths that were monosubstituted with classical electron‐withdrawing or ‐donating groups. The main focus was to understand how the effect of a substituent on one thiophene ring was transmitted through the other thiophene rings in the oligomer
系统地研究了取代基电子对许多低聚噻吩性质的影响,使用了定义明确的,具有不同链长的低聚噻吩,它们被经典的吸电子或供电子基团单取代。主要焦点是了解低聚物中取代基对一个噻吩环的影响如何通过另一个噻吩环传递。通过光学吸收和发射光谱以及通过循环伏安法研究了物理和电化学性质。实验数据得到HOMOLUMO间隙,电荷分布,键长交替和13的理论计算的补充1 H NMR谱。我们表明,取代对取代的环具有重要的电子效应;但是,这种效果在共轭作用下会大大降低。首次使用Hammett方程对定义明确的长共轭体系中的取代基效应进行了半定量评估。