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首页> 外文期刊>Chemistry: A European journal >Diphenylamino end-capped oligofluorenes with enhanced functional properties for blue light emission: Synthesis and structure-property relationships
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Diphenylamino end-capped oligofluorenes with enhanced functional properties for blue light emission: Synthesis and structure-property relationships

机译：具有增强的蓝光发射功能特性的二苯氨基端基低聚芴：合成与结构-性质关系

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摘要

A novel series of monodisperse asymmetrically and symmetrically substituted diphenylamino endcapped 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 inducing good amorphous morphological stability. By tuning the number of diphenylamino end-caps and the chain length, the optimal conjugated length for optical and luminescence properties has been determined. Of all the hitherto reported oligofluorenes capable of serving as non-doped blue emitters, OF(3)-NPh, with an optimal conjugated length, exhibits some of the best hole-transport and blue-emitting properties. A maximum luminance of 7500 cd m(-2) and a luminance efficiency up to 1.8 cd A(-1) have been achieved.
机译：一系列新的单分散不对称和对称取代的二苯基氨基封端的低聚芴。 OF（2）-NPhR，R = H或An（9-蒽基）和OF（n）-NPh，n = 2-4，已通过收敛方法使用钯催化的Suzuki交叉偶联法合成。已显示具有二苯氨基的低聚芴的封端在降低它们的第一电离电势，增强热稳定性和诱导良好的非晶形态稳定性方面具有优势。通过调节二苯氨基端基的数量和链长，可以确定光学和发光性质的最佳共轭长度。在迄今报道的所有能够用作非掺杂蓝色发射体的低聚芴中，OF（3）-NPh具有最佳的共轭长度，显示出一些最佳的空穴传输和蓝色发射性能。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。

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