Dithienylbenzodipyrrolidone: New Acceptor for Donor–Acceptor Low Band Gap Polymers

An
analogue of DPP, dithienylbenzodipyrrolidone (DTBDPD), was successfully
synthesized. Several D–A copolymers, with different electron
donating capability donor unit (fluorene, difluorene, dithienosilole,
and dithienopyrrole) and DTBDPD acceptor, were prepared by means of
Suzuki and Stille coupling reaction. The optical and electrochemical
properties were demonstrated through UV–vis–NIR absorption
and cyclic voltammetry (CV). All polymers showed near-infrared or
even infrared absorption and deeper LUMO levels, as low as −3.80
eV.

一种DPP的类似物，即二噻吩基苯并二吡咯酮（DTBDPD），已被成功合成。通过Suzuki和Stille偶联反应，制备了多种D-A共聚物，这些共聚物具有不同的电子供体单元（如荧光基、二氟荧光基、二噻吩硅烯和二噻吩吡咯）以及DTBDPD受体。通过紫外-可见-近红外吸收光谱和循环伏安法（CV）展示了其光学和电化学性质。所有聚合物均表现出近红外甚至红外吸收，以及更深层次的LUMO能级，最低可达−3.80 eV。