Stability control of the electrooptic effect with new maleimide copolymers containing photoreactive tricyanopyrrolidene‐based chromophores |
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| Authors: | Sang Kyu Lee Min Ju Cho Jung‐Il Jin Dong Hoon Choi |
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| Institution: | 1. Department of Chemistry, Center for Electro‐ and Photo‐Responsive Molecules, Korea University, Seoul 136‐701, South Korea;2. Department of Chemistry, Center for Electro‐ and Photo‐Responsive Molecules, Korea University, Seoul 136‐701, South KoreaDepartment of Chemistry, Center for Electro‐ and Photo‐Responsive Molecules, Korea University, Seoul 136‐701, South Korea |
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| Abstract: | New photocrosslinkable maleimide copolymers have been synthesized by the attachment of a tricyanopyrrolidene‐based chromophore. The 2‐(3‐cyano‐4‐(2‐{4‐hexyl‐(6‐hydroxy‐hexyl)‐amino]‐phenyl}‐vinyl)‐5‐oxo‐1‐{4‐4‐(3‐oxo‐3‐phenyl‐propenyl)‐ phenoxy]‐butyl}‐1,5‐dihydro‐pyrrol‐2‐ylidene)‐malononitrile chromophore exhibits nonlinear optical activity and contains a chalcone moiety that is sensitive to UV light (λ = 330–360 nm) for crosslink formation. The maleimide monomers have also been functionalized with chalcone moieties. The resultant copolymers exhibit great processability, and one of them shows a maximum electrooptic coefficient of 90 pm/V at 1300 nm. We could control the thermal stability of the electrooptic coefficient with the newly synthesized photoreactive copolymers successfully. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 531–542, 2007 |
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| Keywords: | chalcone crosslinking cycloaddition electrooptic effect NLO optics photocrosslinkable chromophores synthesis thermal stability tricyanopyrrolidene chromophores |
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