A new strongly electron-deficient acceptor unit, (3E, 7E)-3,7-bis(6-bromo-7-aza-2-oxoindolin-3-ylidene)-5,7-dihydropyrrolo [2,3-f] indole-2,6(1H,3H)-dione (BADDP, Fig. 1), was designed and synthesized for the first time. Two donor−acceptor (D−A) conjugated polymers, namely P1 and P2, were also synthesized using the new strongly electron-withdrawing unit as the acceptor and thieno [3,2-b]thiophene (TT) and (E)-2-(2-(thiophen-2-yl)vinyl)thiophene (TVT) as the donor units. Their thermal, photophysical, microstructural, and field-effect properties were systematically investigated. Both the polymers with deep lowest unoccupied molecular orbital (LUMO) energy levels (approximately −3.9 eV) for marching with electron transport showed n-type charge transport characteristics with an electron mobility of 0.18 cm² V⁻¹ s⁻¹ under vacuum conditions. Moreover, ambipolar behavior was also obtained with a hole mobility of up to 0.20 cm² V⁻¹ s⁻¹ and an electron mobility of up to 5.8 × 10⁻² cm² V⁻¹ s⁻¹ when exposed to air.

一种新的强电子亏缺受体单元，（3E，7E）-3,7-双（6-溴-7-氮杂-2-氧代吲哚-3-亚基）-5,7-二氢吡咯并[2,3- f ]首次设计并合成了吲哚-2,6（1 H，3 H）-二酮（BADDP，图1）。两个供体-受体（d-A）的共轭聚合物，即P1和P2，使用新的强吸电子单元作为受体和噻吩并[3,2-b]噻吩（TT）和（还合成ë）-2-（2-（噻吩-2-基）乙烯基）噻吩（TVT）作为供体单元。系统地研究了它们的热，光物理，微结构和场效应性质。用于通过电子传输前进的具有最低的最低未占据分子轨道（LUMO）能级（约-3.9 eV）的两种聚合物均显示n型电荷传输特性，在真空条件下的电子迁移率为0.18 cm ²  V ^-1  s ^-1。此外，还获得了双极性行为，空穴迁移率高达0.20 cm ²  V ^-1  s ^-1，电子迁移率高达5.8×10 ^-2  cm ²  V ^-1  s^-1当暴露于空气中时。