了解反芳香族分子的结构-性能关系对于控制它们的电子特性和设计新的有机光电材料至关重要。在这里,我们报告了基于戊烯 (P) 抗芳香核的三种新型抗芳香分子 ( P n , n = 1-4)的设计、合成和表征,以研究给电子和受电子取代基如何影响P1-P4特性。正如预期的那样,光学、HOMO 和 LUMO 能级和电子结构受到核心替代的极大调制。与未取代的化合物 ( P1 ) 相比,P3和P4与具有强电子供体单元的P2相比,包含强吸电子单元的 P2 降低了抗芳香性,这通过独立于核的化学位移 (NICS) 计算进行评估,表明取代强烈地调整了局部抗芳香性。使用这些材料制造的有机场效应晶体管 (OFET) 表明P2的平均空穴迁移率约为 10 -4 cm 2 V -1 s -1而P3的平均电子迁移率高达 0.03 cm 2 V -1 s −1,与FET 无效P1. 因此,将强 π 扩展的吸电子或给电子取代基
The o‐carborane‐based π‐conjugated compound, benzocarborano‐ [2,1‐b:3,4‐b′]dithiophene was synthesized. Its crystal structure revealed high coplanarity for the two thiophene rings of the 2,2′‐bithiophene skeleton, which is fixed in the cisoid structure by the o‐carborane unit. Theoretical calculations indicated non‐aromaticity for its center C6 ring moiety as well as decreased HOMO and LUMO levels
所述Ô -carborane基于π共轭化合物,benzocarborano- [2,1- b:3,4- b ']二噻吩的合成。其晶体结构揭示高的共面的2,2'-联噻吩骨架,其被固定在所述的两个噻吩环cisoid由结构Ó -carborane单元。理论计算表明其中心C 6环部分具有非芳香性,并且HOMO和LUMO含量降低。所述Ô -carborane部分提供通过电感作用的吸电子性质的2,2'-联噻吩单元。
ORGANIC SEMICONDUCTING COMPOUNDS AND RELATED OPTOELECTRONIC DEVICES
申请人:Polyera Corporation
公开号:US20170104160A1
公开(公告)日:2017-04-13
The present teachings relate to new organic semiconducting compounds and their use as active materials in organic and hybrid optical, optoelectronic, and/or electronic devices such as photovoltaic cells, light emitting diodes, light emitting transistors, and field effect transistors. The present compounds can provide improved device performance, for example, as measured by power conversion efficiency, fill factor, open circuit voltage, field-effect mobility, on/off current ratios, and/or air stability when used in photovoltaic cells or transistors. The present compounds can have good solubility in common solvents enabling device fabrication via solution processes.
Enhancing sensing of nitroaromatic vapours by thiophene-based polymer films
作者:G. Nagarjuna、Abhishek Kumar、Akshay Kokil、Kedar G. Jadhav、Serkan Yurt、Jayant Kumar、D. Venkataraman
DOI:10.1039/c1jm12949j
日期:——
Optical sensing, via fluorescence quenching, of nitroaromatic vapours using polythiophenes has received limited attention due to their rather low sensory response. We hypothesized that a dipolar 1,2,3-triazole moiety can enhance the interaction of DNT and TNT with the polymer in thin films and bulky side chains can decrease the chain packing in thin films resulting in enhanced analyte diffusion. Herein we show that thin films of thiophene-based polymers containing 1,2,3-triazole with appropriate alkyl side chains show enhanced fluorescence quenching in the presence of nitroaromatic vapours.
Synthesis and characterization of dehydrothieno[18]annulenes
作者:Abhijit Sarkar、Michael M. Haley
DOI:10.1039/b004962j
日期:——
Use of a palladium/copper alkyne cross-coupling strategy provides access to three tris(thiophene-fused) dodecadehydro[18]annulenes, including examples of both highly symmetrical C3h and unsymmetrical Cs structures.
Dithieno[<i>a</i>,<i>e</i>]pentalene Based Conjugated Polymers: Synthesis and Characterization
作者:Chao Hu、Qing Zhang
DOI:10.1002/cjoc.201300516
日期:2013.11
introducing π‐conjugated but anti‐aromatic repeating units into conjugatedpolymers has been explored. The thermal stability, optical and electrochemical properties of dithieno[a,e]pentalenes (DTP) basedpolymers have been studied. The effect of introducing electron withdrawing repeating units into DTP basedpolymer on the physical properties of polymer has also been investigated. The new polymers showed
已经探索了将π-共轭但抗芳族重复单元引入共轭聚合物中的概念。已经研究了基于二噻吩并[ a ] ,[ e ]戊烯(DTP)的聚合物的热稳定性,光学和电化学性能。还研究了将吸电子重复单元引入基于DTP的聚合物中对聚合物物理性能的影响。新聚合物在可见光和近红外区域显示出广泛的吸收性。