Linear and nonlinear optical properties of linear and hyperbranched conjugated polymers

Anjun Qin; Zhen Li; Jacky Wing Yip Lam; Ben Zhong Tang

doi:10.1117/12.679423

14 September 2006 Linear and nonlinear optical properties of linear and hyperbranched conjugated polymers

Anjun Qin, Zhen Li, Jacky Wing Yip Lam, Ben Zhong Tang

Proceedings Volume 6331, Linear and Nonlinear Optics of Organic Materials VI; 633105 (2006) https://doi.org/10.1117/12.679423
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Azo-functionalized hyperbranched polymers 1 and 2, and linear polyacetylene 3 are synthesized by palladium-catalyzed coupling of triiodoarenes with a diethynylazobenzene, and post functionalization, respectively. These polymers are soluble, film-forming, and morphologically stable (T_g > 180 ^oC). The poled polymer films of 1 and 2 exhibit high second-harmonic generation 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 poled film of polymer 3 shows the trade-off of nonlinearity-transparency-orientation thermal stability. The poled films are all orientationally and thermally stable due to the facile cross-linking of the multiple acetylenic triple bonds in the hyperbranched polymer and the rigid backbone in the linear polyacetylene, respectively.

Citation Download Citation

Anjun Qin, Zhen Li, Jacky Wing Yip Lam, and Ben Zhong Tang "Linear and nonlinear optical properties of linear and hyperbranched conjugated polymers", Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 633105 (14 September 2006); https://doi.org/10.1117/12.679423

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