合成了一种新的供体分子3,8-二甲氧基-[1]苯并噻吩并[3,2- b ] [1]苯并噻吩(DMeO-BTBT),并与氟化的7,7,8,8-四氰基喹二甲烷(准备F n -TCNQ;n = 0、2和4)。所有配合物(DMeO-BTBT)(F n -TCNQ)具有混合的堆栈结构,即使在保存一年后,薄膜和单晶有机晶体管在真空和空气中也表现出n沟道晶体管的性能。尽管根据F n -TCNQ的受体能力提高了薄膜晶体管的性能和稳定性,但所有单晶晶体管都表现出相似的性能和出色的空气稳定性,其中(DMeO-BTBT)(F 2-TCNQ)晶体管具有0.097 cm 2 V -1 s -1的最高迁移率。
stitching reaction and post-functionalization, and their optical and electronic properties could be tuned by changing the terminal substituents. The present stitching reaction also allowed for facile synthesis of dibenzofulvalenes having C, Si, Ge, S, and P as the bridging elements.
Rapid Access to Dibenzohelicenes and their Functionalized Derivatives
作者:Andrej Jančařík、Jiří Rybáček、Kevin Cocq、Jana Vacek Chocholoušová、Jaroslav Vacek、Radek Pohl、Lucie Bednárová、Pavel Fiedler、Ivana Císařová、Irena G. Stará、Ivo Starý
DOI:10.1002/anie.201301739
日期:2013.9.16
Spiraling up: Easy access to dibenzo[5]‐, dibenzo[6]‐, and dibenzo[7]helicenes (see picture) as well as their functionalizedderivatives includes Sonogashira and Suzuki–Miyaura couplings, desilylation, and [2+2+2] alkyne cycloisomerization. The simplicity of this non‐photochemical approach combined with the potential for helicity control favors dibenzohelicenes over the parent helicenes for practical
reduction dominantly occurs over the acetylene reduction. The produced bis(radicalanion) intermediate undergoes a synchronous double-radical 5-endo-dig cyclization. This simple reduction procedure produces two intriguing classes of ladder π-conjugated skeletons, i.e., emissive methylene-bridged stilbenes and dibenzo[a,e]pentalenes regarded as a cyclic 1,4-diphenylbutadiene.
Ruthenium-catalysed cyclisation reactions of 1,11-dien-6-ynes leading to biindenes
作者:Takanori Matsuda、Naoto Yonekubo
DOI:10.1039/d0ob00179a
日期:——
using the Hoveyda-Grubbs 2nd generation catalyst led to the formation of 2,2'-unsubstituted biindenes. Various symmetrical and unsymmetrical bicyclic dienes were prepared by these ruthenium-based cyclisation methods.
bis-silicon-bridged stilbene unit and other types of monomer units, such as bithiophene and diethynylbenzene, have been synthesized by cross-coupling methodologies. While all the homopolymers of the bis-silicon-bridged stilbene skeleton exhibit an intense blue to greenish-blue emission, the copolymers with the bithiophene and diethynylbenzene units show green and orange emissions, respectively, suggesting easy tuning
合成了在主链上含有双硅桥联的(5,10-二氢-5,10-二硅萘并[2,1- a ]茚)骨架的π共轭聚合物。我们的合成使用双硅桥联苯乙烯的3,8-二甲氧基衍生物(2)和3,8-二氟衍生物(3)作为关键前体。因此,它们与适当的碱(对于2和Li t的仲丁基锂)进行区域选择性的正金属化反应3)的Bu 2 ZnTMP,然后用亲电试剂淬灭,得到各种2,7-双官能化的双硅桥连的对苯二甲酸酯。通过使用2,7-双官能化衍生物作为原料,一系列π共轭聚合物,包括双硅桥联苯乙烯骨架的均聚物以及双硅桥联苯乙烯单元与其他类型单体单元之间的共聚物,如联噻吩和二乙炔基苯,已经通过交叉偶联方法合成。尽管双硅桥联二苯乙烯骨架的所有均聚物均显示出强烈的蓝色至绿蓝色发射光,但具有联噻吩和二乙炔基苯单元的共聚物分别显示出绿色和橙色发射光,这表明很容易在宽范围内调节发射颜色。