アントラキノンを溶解したポリメタクリル酸メチルのフォトクロミズムに対する紫外線照射温度の影響

摘要

筆者らは，アミド基が非晶中で平行配向して水素結合を形成し，強誘電性を示すポリアミドを明らかにし，またガラス転移点（T_g）以上でも水素結合によるアミド基間の相関が残存し，大きな誘電率を示すことを明らかにした．また奇数一奇数ナイロンでも，アミド基が結晶中で平行配向して水素結合し，強誘電体となることを示した．%The temperature-dependent photochromism of 9,10-anthraquinone (AQ) in a poly(methyl methacrylate) matrix was investigated. We observed that the coloration reaction by irradiation of 490-495 nm at room temperature was inactivated after UV irradiation at 373 K. over glass transition temperature (T_g). We assume that this is due to the formation of anthrahydroquinone (AQH_2) which can form electron donor acceptor (EDA) complexes as well as hydrogen-bonds with the ester side groups of PMMA. In addition, we observed the coloration reaction was activated again after heating for 3,000 s at 533 K. This reactivation was due to recover the balance between the amount of AQ and that of AQH_2 because AQH_2 was released from the hydrogen-bonding.