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 PLED
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 PLED
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DOI：
10.1039/c2jm16514g
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发表时间：
2012-03
影响因子：
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通讯作者：
Wenbo Wu;Shanghui Ye;Lijin Huang;Li Xiao;Yingjie Fu;Qi Huang;G. Yu;Yunqi Liu;J. Qin;
中科院分区：
文献类型：
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作者：
Wenbo Wu;Shanghui Ye;Lijin Huang;Li Xiao;Yingjie Fu;Qi Huang;G. Yu;Yunqi Liu;J. Qin;
本文利用众所周知的聚集诱导发射（AIE）活性基团四苯基乙烯（TPE）单元，通过“A2 + B4”方法，采用一锅Suzuki缩聚反应，构建了具有咔唑基团的超支化聚合物HP-TPE-Cz，咔唑基团是一个良好的空穴传递和电致发光基团。为了进行比较，制备了类似的线性聚合物LP-TPE-Cz，同样由这两个基团构成。由于TPE单元的存在，这两种聚合物表现出有趣的聚集诱导发射增强（AIEE）行为，并且作为纳米颗粒和固态具有高灵敏度的爆炸化学传感器。与线性聚合物LP-TPE-Cz （1.04 cd a−1,1654 cd m−2）相比，HP-TPE-Cz器件的电流效率（2.13 cd a−1）和发光效率（5914 cd m−2）显著提高。
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 “A2 + B4” 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 A−1) and luminescence efficiency (5914 cd m−2), compared with its analog linear polymer LP-TPE-Cz (1.04 cd A−1, 1654 cd m−2).