Dendronized tricyanopyrroline‐based chromophores in nonlinear optical active host polymer |
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Authors: | Mai Ha Hoang Myung Hee Kim Min Ju Cho Kyung Hwan Kim Kyu Nam Kim Jung‐Il Jin Dong Hoon Choi |
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Institution: | Department of Chemistry, Advanced Materials Chemistry Research Center, Korea University, Seoul 136‐701, South Korea |
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Abstract: | We synthesized new nonlinear optical (NLO) chromophores containing a 3,5‐bis(3,5‐bisbenzyloxy‐benzyloxy)‐benzoate dendron. Tricyanopyrroline (TCP)‐based chromophores were designed and prepared by virtue of its strong electron withdrawing property. A soluble polyimide containing 6‐({4‐2‐(1‐allyl‐4‐cyano‐5‐dicyanomethylene‐2‐oxo‐2,5‐dihydro‐1H‐pyrrol‐3‐yl)‐vinyl]‐phenyl}‐butyl‐amino)‐hexanoyl group in the side chain was also prepared as an NLO active host polymer. A benzoate dendron was tethered at two different binding positions of the chromophore to yield two different guest molecules. Thin‐film composites of these dendronized chromophores dissolved in the NLO active polyimide host were employed to fabricate the electro‐optic (EO) samples. The EO properties of new NLO polyimides containing dendronized chromophores were compared with those of the sample with nondendronized plain chromophores. The effect of a bulky dendron on the EO properties was investigated using an in situ reflection technique. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5064–5076, 2008 |
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Keywords: | dendronized chromophore host‐guest‐systems NLO polyimides tricyanopyrroline |
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