A new family of perpendicularly entangled perylene diimides and di(perylene diimide) dimers featuring double linkage was synthesized via copper-mediated Ullmann coupling. The highly twisting structures endow them remarkable electron transport characteristics with comparable mobility reaching 0.16 cm2 V−1 s−1 and an on/off current ratio up to 5.0 × 106 in air for PDI dimer based solution-processed OTFTs. While diPDI dimers with expanded conjugated core proved their competing electron mobilities as PDI dimers, especially for their low threshold voltage and good air stability.
通过
铜介导的乌尔曼偶联反应,合成了具有双键的新型垂直交缠
苝二
酰亚胺和二(
苝二
酰亚胺)二聚体。高度扭曲的结构赋予它们卓越的电子传输特性,在空气中,基于PDI二聚体的溶液加工OTFT的迁移率可达0.16 cm2 V−1 s−1,开/关电流比可达5.0 × 106。具有扩展共轭核心的二PDI二聚体证明了其与PDI二聚体具有相同的电子迁移率,特别是低阈值电压和良好的空气稳定性。