Synthesis and Properties of Chromophores with a Pyrroline-Type Acceptor for Electro-Optic Polymers
摘要:
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.
通过三丁基锡烷自由基还原衍生自三,四,五,五,六和七乙二醇的ω-碘多聚氧杂烷基丙烯酸酯,得到未环化还原产物和通过内环化形成的大环醚的混合物。在精心定义的条件下,确定80℃下苯中的中间体自由基环化的速率常数为15 x 10(4),13 x 10(4),5.1 x 10(4),10 x 10(4)和3.6 x 10(4)s(-)(1),分别用于形成12、15、18、21和24元环。这些值表明,与先前报道的烯基物质的环化相比,链中氧原子的存在使速率增加了10-30倍。苯在80摄氏度时的速率常数和甲基丙烯酸酯,巴豆酸酯,已经确定了8-碘-3,6-二氧杂辛醇的肉桂酸酯,马来酸酯和富马酸酯。在极性不同的溶剂中丙烯酸8-碘-3,6-二氧杂辛酯的还原表明环化速率具有相对较低的溶剂依赖性。
Formation of substituted macrocyclic ethers by radical cyclisation
作者:Athelstan L. J. Beckwith、Kitty Drok、Bernard Maillard、Marie Degueil-Castaing、Annie Philippon
DOI:10.1039/a608494j
日期:——
ω-Iodopolyoxaalkyl acrylates and related compoundsundergo radical
cyclisation when treated with tributylstannane to afford substituted
macrocylic polyethers.