Abstract
We synthesized four electro-optic (EO) chromophores, which contained an aniline donor and an acceptor of 4-cyano-5-dicyanomethylene-2-oxo-3-pyrroline (CDCOP) with alkyl groups and/or oxyethylene chains terminated by an acrylate group as the three substituents. Photopolymerization of the mixture composed of the CDCOP derivatives, a liquid acrylate monomer and a radical photoinitiator was performed, and the chromophore fixation by crosslinking was achieved although about 30% of the chromophores were degraded by the radical attacks during crosslinking. Corona poling of these CDCOP derivatives in PMMA as a matrix polymer was successful regardless of the substituents. However, poling of the CDCOP derivatives in the liquid acrylate monomer matrix during photocrosslinking was difficult, and the poling conditions should be optimized.
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