Diphenylamino End-Capped Oligofluorenes with Enhanced Functional Properties for Blue Light Emission: Synthesis and Structure-Property Relationships
作者:Zhong Hui Li、Man Shing Wong、Ye Tao、Jianping Lu
DOI:10.1002/chem.200401152
日期:2005.5.20
symmetrically substituted diphenylamino end-capped oligofluorenes, OF(2)-NPhR, R = H or An (An = 9-anthryl) and OF(n)-NPh, n = 2-4, has been synthesized by a convergent approach using palladium-catalyzed Suzuki cross-coupling. End-capping of oligofluorenes with diphenylamino group(s) has been shown to offer advantages in terms of lowering their first ionization potentials, enhancing thermal stability, and
已经开发了一系列新颖的单分散不对称和对称取代的二苯基氨基端基封端的芴,OF(2)-NPhR,R = H或An(An = 9-蒽)和OF(n)-NPh,n = 2-4,通过使用钯催化的铃木交叉偶联的收敛方法合成。已显示具有二苯氨基的低聚芴的封端在降低其第一电离电势,增强热稳定性和诱导良好的非晶态形态稳定性方面具有优势。通过调节二苯基氨基端基的数目和链长,已经确定了光学和发光性质的最佳共轭长度。在迄今为止报道的所有能够用作非掺杂蓝色发射体的寡芴中,OF(3)-NPh具有最佳的共轭长度,具有某些最佳的空穴传输和发蓝光性能。已经实现了7500 cd m(-2)的最大亮度和高达1.8 cd A(-1)的亮度效率。