3,6-Di(furan-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione and bithiophene copolymer with rather disordered chain orientation showing high mobility in organic thin film transistors
The quinoxalineimide (QI) unit, containing the electron-withdrawing quinoxaline and imide groups, is an electron-deficient buildingblock for organicsemiconductor materials. In this study, three fluorinated or chlorinated QIs (QI-1F, QI-2F, and QI-2Cl), have been designed and developed. We report the impact of the fluorination or chlorination of the QI unit on the electronic structures and charge
喹喔啉酰亚胺 (QI) 单元包含吸电子喹喔啉和酰亚胺基团,是有机半导体材料的缺电子结构单元。在本研究中,设计和开发了三种氟化或氯化 QI(QI-1F、QI-2F和QI-2Cl )。我们报告了与具有相同n的未取代 QI ( QI-2H )相比,QI 单元的氟化或氯化对电子结构和电荷载流子传输特性的影响-己基侧链。随着氟或氯原子在 QI 的 π 框架上的结合,前沿分子轨道能级下降。单晶结构分析表明,所有基于 QI 的分子都具有完全平面的主链,并被包装成具有对角电子耦合的二维滑动堆叠,从而实现二维电荷载流子传输。值得注意的是,双氟化或氯化的QIs通过相对于未取代的QI( QI-2H)无限的分子间网络在单晶结构中形成紧密的分子堆积。基于场效应晶体管的 QI 分子表现出典型的 n 沟道传输特性。与未取代的 QI ( QI-2H),氯化的QI表现出改善的电子迁移率高达7.1 × 10 -3 cm 2 V
Thiadiazole-fused Quinoxalineimide as an Electron-deficient Building Block for N-type Organic Semiconductors
A strong electron-accepting planar π-conjugated framework, thiadiazole-fused quinoxalineimide (TQI), was designed and synthesized. Three TQI-based small molecules exhibit deep lowest-unoccupied molecular orbital (LUMO) levels, which require air stable n-channel conduction (∼−4.0 eV). Among these molecules, Hex-TQI-Br exhibits air-stable n-channel charge transport with a moderate mobility of 0.044 cm2
设计并合成了一个强电子接受平面π共轭骨架,噻二唑稠合的喹喔啉酰亚胺(TQI)。三个基于TQI的小分子表现出极低的最低空分子轨道(LUMO)水平,这需要空气稳定的n通道传导(〜-4.0 eV)。在这些分子中,Hex-TQI-Br表现出空气稳定的n沟道电荷迁移,迁移率为0.044 cm 2 V –1 s –1。
The imide-functionalized quinoxaline unit allows for the incorporation of an additional solubilizing group without disturbing the planar structure of the core unit.