Synthesis, size-dependent optoelectronic and charge transport properties of thieno(bis)imide end-substituted molecular semiconductors
作者:Margherita Durso、Cristian Bettini、Alberto Zanelli、Massimo Gazzano、M. Grazia Lobello、Filippo De Angelis、Viviana Biondo、Denis Gentili、Raffaella Capelli、Massimiliano Cavallini、Stefano Toffanin、Michele Muccini、Manuela Melucci
DOI:10.1016/j.orgel.2013.07.019
日期:2013.11
calculations, optical and electrochemical characterization allowed us to assess the role of the π-conjugation extent, i.e., of the oligomer size on the optoelectronic properties of these materials. In both TBI ended compounds, due to the strong localization of the LUMO orbital on the TBI unit, the LUMO energy is almost insensitive to the oligomer size, this being crucial for the fine-tailoring of the energy and
据报道,合成了两种新型的噻吩并双(酰亚胺)(TBI,N)末端官能化的低聚噻吩半导体。特别地,已经合成并表征了三聚体(NT3N)和五聚体(NT5N)。测试并比较了两种不同的合成方法,即常规的Stille交叉偶联和通过C–H活化的直接芳基化反应。理论计算,光学和电化学表征使我们能够评估π共轭程度的作用,即低聚物尺寸对这些材料的光电性能的作用。在两个TBI末端化合物中,由于LUMO轨道在TBI单元上的强烈定位,LUMO能量几乎对低聚物的大小不敏感,这对于能量的精细定制和前沿轨道的分布至关重要。出奇,μ Ñ = 10 -4 厘米2 V -1 小号-1,同时增加了低聚物尺寸NT5N促进与移动性高达双极行为和电致发光特性μ Ñ = 0.14厘米2 V -1 小号-1和μ P = 10 -5 cm 2 V -1 s -1。