Using low generation dendrimers as monomers to construct dendronized hyperbranched polymers with high nonlinear optical performance
作者:Wenbo Wu、Zhen Xu、Zhen Li
DOI:10.1039/c4tc01396d
日期:——
By combining the structure of hyperbranched polymer and dendrimer, two second-order nonlinear optical (NLO) dendronized hyperbranched polymers, PG1 and PG2, were prepared with satisfactory yields through the Suzuki coupling reaction using low generation dendrimers as the monomers. Due to their highly branched structure, both of them have good solubility and processability. These two polymers inherited the advantages of hyperbranched polymers (good stability) and dendrimers (large NLO coefficient) simultaneously, especially for PG1. Its NLO coefficient d33 value and d33(∞) value were as high as 166 and 27 pm V−1, respectively, and no obvious decay was observed in its d33 value when its thin film was heated to 117 °C.
通过结合超支化聚合物和树状聚合物的结构,成功合成了两种二阶非线性光学(NLO)树状超支化聚合物PG1和PG2,产率令人满意,这一过程是通过铃木偶联反应,使用低代树状聚合物作为单体。由于其高度支化的结构,这两种聚合物都具有良好的溶解性和可加工性。这两种聚合物同时继承了超支化聚合物(良好的稳定性)和树状聚合物(大的NLO系数)的优点,尤其是PG1。其NLO系数d33值和d33(∞)值分别高达166和27 pm V−1,并且在其薄膜加热至117 °C时,d33值未观察到明显衰减。