New hyperbranched polymers containing second-order nonlinear optical chromophores: Synthesis and nonlinear optical characterization

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• 作者：Zhichao Zhu ; Zhong'an Li ; Yong Tan ; Zhen Li ; Qianqian Li ; Qi Zeng ; Cheng Ye and Jingui Qin
• 关键词：Hyperbranched polymers ; Synthesis ; Nonlinear optics
• 刊名：Polymer
• 出版年：2006
• 出版时间：30 October 2006
• 年：2006
• 卷：47
• 期：23
• 页码：7881-7888
• 全文大小：271 K

文摘

Three hyperbranched polymers (P1–P3) containing second-order nonlinear optical chromophores were synthesized by copolymerization of aromatic dialdehydes (carbazole, triphenylamine or benzene moieties) with sulfonyl-based chromophores attached with three active methylene groups, from “A₂ + B₃” approach based on simple Knoevenagel reaction. For comparison, their corresponding linear analogue polymers (P4–P6) were prepared. All the polymers are soluble in common organic solvents, and exhibit good thermal stability. The tested NLO properties of the hyperbranched polymers are better than their corresponding linear polymers, due to the three-dimensional spatial separation of the chromophores in the obtained hyperbranched polymeric structures.