Dendronized Polyfluorenes with High Azo-Chromophore Loading Density: Convenient Synthesis and Enhanced Second-Order Nonlinear Optical Effects

doi:10.1021/ma901108r

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	Dendronized Polyfluorenes with High Azo-Chromophore Loading Density: Convenient Synthesis and Enhanced Second-Order Nonlinear Optical Effects
	Li, Zhong'an 1; Yu, Gui 2; Liu, Yunqi 2; Ye, Cheng 2; Qin, Jingui 1; Li, Zhen 1
刊名	MACROMOLECULES
	2009-09-08
卷号	42 期号:17 页码:6463-6472
ISSN号	0024-9297
DOI	10.1021/ma901108r
英文摘要	Two new dendronized nonlinear optical (NLO) polyfluorenes were synthesized with high azochromophore loading density by the introduction of high generation chromophore dendrons on the side chains. Thanks to the advantages of Sharpless' click chemistry reaction, the dendrons were conveniently bonded to the backbone of polyfluorene with the conversion of 100%, although they were really very bulky. The new-formed triazole rings in the dendrons acted as suitable isolation groups to minimize the strong dipole-dipole interactions among the polar chromophore moieties to improve NLO effects, according to the results obtained from UV-vis spectra and order parameters. All the polymers were well characterized and exhibited good solubility, high thermal ability, wide optical window, and large NLO, effects (up to 106.0 pm/V). In addition, the tested NLO results of these dendronzied polymers demonstrated a deviation from the dipolar frustration that typically limits the NLO effect in conventional chromophore/polymer composite materials, indicating that the frequently observed asymptotic dependence of electro-optic activity on chromophore density may be overcome through rational design.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000269635900018
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/66989]
专题	中国科学院化学研究所
通讯作者	Li, Zhen
作者单位	1.Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Inst Chem, Organ Solids Labs, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhong'an,Yu, Gui,Liu, Yunqi,et al. Dendronized Polyfluorenes with High Azo-Chromophore Loading Density: Convenient Synthesis and Enhanced Second-Order Nonlinear Optical Effects[J]. MACROMOLECULES,2009,42(17):6463-6472.
APA	Li, Zhong'an,Yu, Gui,Liu, Yunqi,Ye, Cheng,Qin, Jingui,&Li, Zhen.(2009).Dendronized Polyfluorenes with High Azo-Chromophore Loading Density: Convenient Synthesis and Enhanced Second-Order Nonlinear Optical Effects.MACROMOLECULES,42(17),6463-6472.
MLA	Li, Zhong'an,et al."Dendronized Polyfluorenes with High Azo-Chromophore Loading Density: Convenient Synthesis and Enhanced Second-Order Nonlinear Optical Effects".MACROMOLECULES 42.17(2009):6463-6472.