一系列基于萘二噻吩二酰亚胺(NDTI)的半导体聚合物,具有各种共聚单体单元,即噻吩亚乙烯基(TV),萘[1,2- b:5,6- b ']二噻吩(NDT),亚乙烯基(V),苯并[ c ] [1,2,5]噻二唑(BTz)和萘并[1,2- c:5,6- c分别使用2,7-二溴-NDTI或2,7-双(三甲基锡烷基)-NDTI通过Stille偶联或碘化铜辅助Stille偶联合成了′] bis [1,2,5]噻二唑(NTz)。通过循环伏安法和光电子能谱估计了它们的HOMO和LUMO能级。基于NDTI的聚合物的HOMO能级受到共聚单体单元电子性质的强烈影响。相反,它们的LUMO能级几乎相同,这可能是由于其在NDTI部分上的局部LUMO所致。由于低位的LUMO(〜-4.0 eV),双极性(PNDTI-TV,-NDT,〜0.082 cm 2 V –1),所有聚合物在场效应晶体管(FET)中均显示出空气稳定的电子传输。š
Naphthodithiophenediimide (NDTI): Synthesis, Structure, and Applications
摘要:
A straightforward synthesis of alpha,beta-unsubstituted and alpha-halogenated naphtho[2,3-b:6,7-b']-dithiophenediimides (NDTIs) is described. Electrochemical and optical studies of N,N-dioctyl-NDTI demonstrate that the compound has a low-lying LUMO energy level (4.0 eV below the vacuum level) and a small HOMO-LUMO gap (similar to 2.1 eV). With its interesting electronic and optical properties, in addition to its planar structure, NDTI is a promising building block for the development of novel pi-functional materials. In fact, it afforded n-channel, p-channel, and ambipolar materials, depending on the molecular modification.