首页> 美国卫生研究院文献>Chemical Science >Janus second-order nonlinear optical dendrimers: their controllable molecular topology and corresponding largely enhanced performance
【2h】

Janus second-order nonlinear optical dendrimers: their controllable molecular topology and corresponding largely enhanced performance

机译:Janus二阶非线性光学树枝状聚合物:其可控的分子拓扑结构和相应的大幅增强的性能

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

A new type of Janus dendrimers, consisting of two different side dendrons with the dipole orientation of the second-order nonlinear optical (NLO) chromophore moieties partially in a non-centrosymmetric direction, was intelligently designed and synthesized in order to enhance the macroscopic NLO performance and break through the limitation of NLO efficiency in the current molecular topological structure of azo chromophore-based polymers. This kind of Janus dendritic structure was constructed by the combination of convergent and divergent methods, with the utilization of a powerful “click chemistry reaction”. The obtained three dendrimers, >D-13N, >D-17N and >D-21N, show very high NLO performance, especially the dramatically enhanced NLO coefficient of 299 pm V–1 for >D-13N, which is the highest value ever reported for polymers containing a simple azo chromophore. The new dendrimers provide a clear structure–properties relationship between high NLO efficiency and the controllable molecular topology with the non-centrosymmetrical alignment of dipole orientation, thus opening up a new avenue for the further development of NLO dendrimers with high performance and more importantly providing some clues for the rational design of functional dendrimers with controllable molecular topology.
机译:智能设计并合成了一种新型的Janus树状大分子,该树状大分子由两个不同的侧树枝状分子组成,这些树枝状分子的二阶非线性光学(NLO)生色团部分的偶极取向部分地位于非中心对称方向,以增强宏观NLO性能并突破了基于偶氮发色团的聚合物当前分子拓扑结构中NLO效率的局限性。这种Janus树突状结构是通过收敛和发散方法的结合,并利用强大的“点击化学反应”来构建的。所获得的三种树状大分子> D-13N ,> D-17N 和> D-21N 表现出非常高的NLO性能,特别是NLO系数显着提高> D-13N 的299 pm V –1 值,这是有报道的含简单偶氮发色团的聚合物的最高值。新的树枝状聚合物通过偶极子取向的非中心对称排列,在高NLO效率和可控制的分子拓扑结构之间提供了清晰的结构-性质关系,从而为进一步开发高性能的NLO树枝状聚合物开辟了一条新途径,更重要的是提供了一些新的途径合理设计具有可控分子拓扑的功能树状聚合物的线索。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号