A conjugated hyperbranched polymer constructed from carbazole and tetraphenylethylene moieties: convenient synthesis through one-pot “A2 + B4” Suzuki polymerization, aggregation-induced enhanced emission, and application as explosive chemosensors and PLEDs
作者:Wenbo Wu、Shanghui Ye、Lijin Huang、Li Xiao、Yingjie Fu、Qi Huang、Gui Yu、Yunqi Liu、Jingui Qin、Qianqian Li、Zhen Li
DOI:10.1039/c2jm16514g
日期:——
In this paper, tetraphenylethylene (TPE) units, a well-known aggregation-induced emission (AIE) active group, are utilized to construct the hyperbranched polymer HP-TPE-Cz with carbazole moieties, a good hole-transporting and electroluminescent group, through an âA2 + B4â approach by using a one-pot Suzuki polycondensation reaction. For comparison, its analog linear polymer LP-TPE-Cz, also constructed from these two moieties, was prepared. These two polymers exhibit interesting aggregation-induced emission enhanced (AIEE) behavior and act as explosive chemosensors with high sensitivity both as nanoparticles and in solid state, due to the presence of TPE units. Also, the HP-TPE-Cz PLED device exhibited a remarkably enhanced current efficiency (2.13 cd Aâ1) and luminescence efficiency (5914 cd mâ2), compared with its analog linear polymer LP-TPE-Cz (1.04 cd Aâ1, 1654 cd mâ2).
在本文中,利用四苯乙烯(TPE)单元,这是一种众所周知的聚集诱导发光(AIE)活性基团,通过“一锅法”铃木聚缩合反应,构建了具有良好孔导电性和电致光发射特性的胺基喹啉(HP-TPE-Cz)超支化聚合物。作为对比,其类似的线性聚合物LP-TPE-Cz也由这两种基团构建而成。这两种聚合物表现出有趣的聚集诱导发光增强(AIEE)行为,并由于TPE单元的存在,作为纳米颗粒和固态均具有高灵敏度的爆炸性化学传感器。此外,HP-TPE-Cz PLED器件展现出显著提高的电流效率(2.13 cd A⁻¹)和发光效率(5914 cd m⁻²),相比于其类似线性聚合物LP-TPE-Cz(1.04 cd A⁻¹, 1654 cd m⁻²)。