Bipolar charge transport in organic electron donor‐acceptor systems with stable organic radicals as electron‐withdrawing moieties
作者:Ares Bobet、Alba Cuadrado、Lluís Fajarí、Ignasi Sirés、Enric Brillas、Maria Pilar Almajano、Vygintas Jankauskas、Dolores Velasco、Luis Juliá
DOI:10.1002/poc.3974
日期:2019.9
Two very stable organic radical adducts 1 and 2 formed by an electron donor‐acceptor system with bipolar charge transport behavior have been investigated. Both present the same electron donor moiety, 3,6‐bis(N‐carbazolyl)carbazole, and are distinguished by the paramagnetic electron‐withdrawing moiety, tris(2,3,5,6‐tetrachlorophenyl)methyl radical (DTM) in 1 and tris(2,4,6‐trichlorophenyl)methyl radical
已经研究了由具有双极性电荷传输行为的电子给体-受体体系形成的两个非常稳定的有机自由基加合物1和2。两者都存在相同的电子给体部分,3,6-双(Ñ咔唑基)咔唑,并通过在所述顺磁性吸电子部分,三(2,3,5,6-四氯苯基)甲基基团(DTM)来区分1在和三(2,4,6-三氯苯基)甲基基团(TTM)2。它们显示出低带隙(HOMO和LUMO轨道之间的差异),1和2的1.54和1.81 eV分别吸收电磁光谱的可见光范围。两种自由基加合物均具有合适的电荷传输结果,其中DTM衍生物1表现出最佳性能。因此,具有较高结构拥塞的1显示出良好平衡的双极性行为以及最高的空穴和电子迁移率值。