A Series of DendronizedHyperbranched Polymers with Dendritic ChromophoreMoities in the Periphery: Convenient Synthesis and Large Nonlinear Optical Effects
Over the past decade, organic/polymeric second-order nonlinear optical (NLO) materials have attracted considerable attention, due to their promising performance for applications in varied fields including data storage, optical sensors, telecommunications and electro-optic modulators, etc.1It is one of the most efficient way to improve the comprehensive performance of NLO polymers that introduing dendritic structure to NLO chrmophores, due to the three-dimensional spatial separation of dendritic structures endows the polymers with favorable siteisolation effect, which could minimize the strong intermolecularelectrostatic interactions among chromophore moietieswith high dipole moment, thus enhance the macroscopic optical nonlinearities.2In this contribution, by utilizing low generation NLO dendrimer, in which one sulfonyl-based chromophore was used as isolation chromophore of two nitro-based chromophores, as initiator, a new type of dendronized hyperbranched polymers (DHPs) P1-P3 were prepared convenientlythrough one-pot atom transfer radical polymerization (ATRP) with satisfactory yields.Differernt from the previous NLO DHPs, of which the dendritic NLO chromophores were usually linked in the interior architecture, the NLO chromophores were introduced in the periphery of P1-P3.Thanks to this special structure, all of them demonstrated large NLO effects.For P1, its NLO coefficient d33 value was tested as 179.6 pm/V, which, to the best of our knowledge, is the highest value so far for polymeric materials except high generation dendrimers.In adittion, the optical transparency of P1-P3 could be further improved, due to the introduction of isolation chromophores.Coupled with its high NLO coefficient and convenient synthesis, P1 could serve as a good candidate for real optical application.
Haitao Yang Runli Tang Wenbo Wu Shengang Xu Zhen Li Shaokui Cao
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China Department of Chemistry, Wuhan University, Wuhan 430072, China
国际会议
9th International Symposium on High-Tech Polymer Materials(第9届国际高技术高分子材料学术会议)(HTPM-9)
郑州
英文
68-68
2016-07-11（万方平台首次上网日期，不代表论文的发表时间）