Molar absorption coefficient and radiolytic yield of solvated electrons in diethylmethyl(2-methoxy)ammonium bis (trifluoromethanesulfonyl)imide ionic liquid

四級アンモニウムの疎水性イオン液体中の溶媒和電子のモル吸光係数と分解収量

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

Asano, Akira*; Yang, J.*; Kondo, Takafumi*; Norizawa, Kimihiro*; 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四級アンモニウム塩の疎水性イオン液体(DEMMA-TFSI:N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium-bis(trifluoromethanesulfonyl)imide)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。ここで、溶媒和電子のモル吸光係数が2.310Mcm(=1100nm)、その分解収量であるG値が0.810 mol Jを明らかにした。

The molar extinction coefficient and the radiolytic yield of solvated electrons in ionic liquid of DEMMA-TFSI were estimated respectively to be 2.310 L mol cm and 0.810 mol J by observing the reaction and kinetics of solvated electron and dry electron in the ionic liquid. The solvated electron in DEMMA-TFSI has a very broad absorption spectrum peaking at 1100 nm and reacts slowly with pyrene with a rate constant of 3.510 L mol s, while the dry electron is captured rapidly by pyrene with C value of 0.065 mol L.