イオン液体の溶媒和電子の生成と反応のパルスラジオリシスによる研究

The Study of formations and reactions of solvated electrons in ionic liquids by using pulse radiolysis

浅野 晃*; 近藤 孝文*; Yang, J.*; 田口 光正; 永石 隆二 ; 高橋 憲司*; 吉田 陽一*

Asano, Akira*; Kondo, Takafumi*; Yang, J.*; Taguchi, Mitsumasa; Nagaishi, Ryuji; Takahashi, Kenji*; Yoshida, Yoichi*

ナノ秒・ピコ秒パルスラジオリシス法を用いて疎水性イオン液体(DEMMA-TFSI:N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium-bis(trifluoromethanesulfonyl)imide)と親水性イオン液体(DEMMA-BF:N,N-Diethyl-N-methyl-N- (2-methoxyethyl)ammonium-tetrafluoroborate)中の溶媒和電子のスペクトル,生成と減衰挙動を観測し、電子捕捉剤(ピレン)との反応などを研究した。溶媒和電子のモル吸光係数は2.210Mcm(=1100nm)、G値は0.9#100eVであった。

The spectrum and kinetic behavior of solvated electrons in DEMMA-TFSI and DEMMA-BF ionic liquids (ILs) were investigated by using nanosecond pulse radiolysis technique. The reactions of the solvated electrons with pyrene were studied. The molar extinction coefficient and G value of the solvated electrons in ILs were estimated to be 2.210Mcm(at 1100nm) and 0.9#100eV. The formation of the solvated electrons in IL on picosecond time scale was observed by picosecond pulse radiolysis.