Facile synthesis, large optical nonlinearity, and excellent thermal stability of hyperbranched poly(aryleneethynylene)s containing azobenzene chromophores

Zhen Li; Anjun Qin; Jacky W.Y. Lam; Yuping Dong; Yongqiang Dong; Cheng Ye; Ian D. Williams; Ben Zhong Tang

doi:10.1021/ma051924f

Facile synthesis, large optical nonlinearity, and excellent thermal stability of hyperbranched poly(aryleneethynylene)s containing azobenzene chromophores

Zhen Li, Anjun Qin, Jacky W.Y. Lam, Yuping Dong, Yongqiang Dong, Cheng Ye, Ian D. Williams, Ben Zhong Tang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

118 Citations (Scopus)

Abstract

Azo-functionalized hyperbranched poly(aryleneethynylene)s (hb-PAEs) (4 and 5) are synthesized by palladium-catalyzed coupling of triiodoarenes (1 and 2) with a diethynylazobenzene (3). The hb-PAEs are soluble, film-forming, and morphologically stable (T_g > 180°C). Their poled films exhibit nigh second-harmonicgeneration coefficients (d₃₃ up to 177 pm/V) thanks to the chromophore-separation and site-isolation effects of hyperbranched architectural structure of the polymers in the three-dimensional space. The optical nonlinearities of the poled films are thermally stable (no drop in d₃₃ when heated to 152°C) due to the facile cross-linking of the multiple acetylenic triple bonds in the hb-PAEs at moderate temperatures (down to 88°C).

Original language	English
Pages (from-to)	1436-1442
Number of pages	7
Journal	Macromolecules
Volume	39
Issue number	4
DOIs	https://doi.org/10.1021/ma051924f
Publication status	Published - 21 Feb 2006
Externally published	Yes

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title = "Facile synthesis, large optical nonlinearity, and excellent thermal stability of hyperbranched poly(aryleneethynylene)s containing azobenzene chromophores",

abstract = "Azo-functionalized hyperbranched poly(aryleneethynylene)s (hb-PAEs) (4 and 5) are synthesized by palladium-catalyzed coupling of triiodoarenes (1 and 2) with a diethynylazobenzene (3). The hb-PAEs are soluble, film-forming, and morphologically stable (Tg > 180°C). Their poled films exhibit nigh second-harmonicgeneration coefficients (d33 up to 177 pm/V) thanks to the chromophore-separation and site-isolation effects of hyperbranched architectural structure of the polymers in the three-dimensional space. The optical nonlinearities of the poled films are thermally stable (no drop in d33 when heated to 152°C) due to the facile cross-linking of the multiple acetylenic triple bonds in the hb-PAEs at moderate temperatures (down to 88°C).",

author = "Zhen Li and Anjun Qin and Lam, {Jacky W.Y.} and Yuping Dong and Yongqiang Dong and Cheng Ye and Williams, {Ian D.} and Tang, {Ben Zhong}",

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TY - JOUR

T1 - Facile synthesis, large optical nonlinearity, and excellent thermal stability of hyperbranched poly(aryleneethynylene)s containing azobenzene chromophores

AU - Li, Zhen

AU - Qin, Anjun

AU - Lam, Jacky W.Y.

AU - Dong, Yuping

AU - Dong, Yongqiang

AU - Ye, Cheng

AU - Williams, Ian D.

AU - Tang, Ben Zhong

PY - 2006/2/21

Y1 - 2006/2/21

N2 - Azo-functionalized hyperbranched poly(aryleneethynylene)s (hb-PAEs) (4 and 5) are synthesized by palladium-catalyzed coupling of triiodoarenes (1 and 2) with a diethynylazobenzene (3). The hb-PAEs are soluble, film-forming, and morphologically stable (Tg > 180°C). Their poled films exhibit nigh second-harmonicgeneration coefficients (d33 up to 177 pm/V) thanks to the chromophore-separation and site-isolation effects of hyperbranched architectural structure of the polymers in the three-dimensional space. The optical nonlinearities of the poled films are thermally stable (no drop in d33 when heated to 152°C) due to the facile cross-linking of the multiple acetylenic triple bonds in the hb-PAEs at moderate temperatures (down to 88°C).

AB - Azo-functionalized hyperbranched poly(aryleneethynylene)s (hb-PAEs) (4 and 5) are synthesized by palladium-catalyzed coupling of triiodoarenes (1 and 2) with a diethynylazobenzene (3). The hb-PAEs are soluble, film-forming, and morphologically stable (Tg > 180°C). Their poled films exhibit nigh second-harmonicgeneration coefficients (d33 up to 177 pm/V) thanks to the chromophore-separation and site-isolation effects of hyperbranched architectural structure of the polymers in the three-dimensional space. The optical nonlinearities of the poled films are thermally stable (no drop in d33 when heated to 152°C) due to the facile cross-linking of the multiple acetylenic triple bonds in the hb-PAEs at moderate temperatures (down to 88°C).

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U2 - 10.1021/ma051924f

DO - 10.1021/ma051924f

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VL - 39

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JO - Macromolecules

JF - Macromolecules

IS - 4

ER -

Facile synthesis, large optical nonlinearity, and excellent thermal stability of hyperbranched poly(aryleneethynylene)s containing azobenzene chromophores

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