基于马来酰亚胺的树枝状大分子全彩发光材料的设计、合成及性能研究

Tunable emission color and high solid-state quantum efficiency are two important issues in the construction of emitting materials. In this project, a series of dendrimers with different configuration (two, three or four branch core), different composition (core, dendrons, perpheral groups), different generation numbers (one, two, three or four), different emission color (blue, green, yellow, orange or red) based on easily functionalized arylmaleimide derivatives with tunable emission color will be designed and synthesized by the strategy combining divergent and convergent methods, employing alkylation reaction of imides. The researches aim at realizing tunable emission color and high solid-state quantum efficiency simultaneously, through suppressing the effect of intermolecular interaction on solid-state quantum efficiency for regional isolation effect of dendrimes, and adjusting emission wavelength by changing electronic effect of groups in maleimide. These dendrimers will be employed as light-emitting materials to fabricate devices of monochromatic light and white light, employing solution-processed method. The effect of dendrimers' configuration, composition and generation number on electroluminescence of devices as well as internal energy transfer mechanism of dendrimers will also be investigated. The results of researches will provide the theory guidance for designing solid-state light-emitting materials, improving properties of their devices, and realizing full-color displays.

可调的发光颜色和高的固态量子效率是有机荧光材料研究中的两个重要主题。本项目利用芳基马来酰亚胺衍生物易于功能化和发光颜色可调的性能，通过简单的酰亚胺烷基化反应，采用先发散后收敛的方法，拟设计并合成一系列基于马来酰亚胺荧光团的具有不同构型（两、三或四个方向引发）、不同组成（核、树枝和外围基团）、不同代数（一、二、三或四代）和不同发光颜色（蓝、绿、黄、橙或红）的树枝状大分子。研究旨在利用树枝状大分子的区域隔离效应和高度有序的三维空间结构抑制分子间相互作用对固态荧光效率的影响，通过改变马来酰亚胺上取代基的电子效应来调控发光颜色，以同时实现大分子在可见光范围内发射波长可控和高效的固态发光。并将这些树枝状大分子作为发光材料采用溶液法制作单色光和白光器件，揭示大分子构型、组成和代数对电致发光性能的影响规律，阐明发光材料内部能量转移机制，为全彩固态发光材料的设计、提高其器件性能和实现全彩显示提供理论依据。