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チオシアン酸系イオン液体中の溶媒和電子と二量体ラジカルイオンの放射線分解生成

Transient and steady-state spectroscopic properties in ionic liquids of thiocyanate salts

永石 隆二; 青柳 登; 榛葉 祐介; 田口 光正; 近藤 孝文*; Yang, J.*; 吉田 陽一*

Nagaishi, Ryuji; Aoyagi, Noboru; Shinha, Yusuke; Taguchi, Mitsumasa; Kondo, Takafumi*; Yang, J.*; Yoshida, Yoichi*

チオシアン酸を陰イオンに持つイオン液体中の放射線分解反応を、電子線ライナックを用いたパルスラジオリシス法により研究した。チオシアン酸の二量体ラジカルイオンの直接形成をナノ秒領域の過渡吸収で観測することで、この液体のイオン化部位の一つがチオシアン酸イオンであることを見いだすとともに、液体組成の変化や電子捕捉剤の添加によって溶媒和電子を含む分解活性種の生成と反応挙動を調べた。

Radiolytic reactions in ionic liquids of thiocyanate salts were studied by means of the nano-second pulse radiolysis technique. One of the significant ionization sites of liquids was found out to be thiocyanate ion by observing direct formation of its dimer radical anion, not via the diffusion reaction between thiocyanate radical and ion. The formation and reaction behaviors of solvated electron and dimer were examined by changing the composition of liquids and by adding electron scavengers to the liquid.

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