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Electron spin resonance study on H$$_{6}$$$$^{+}$$, H$$_{5}$$D$$^{+}$$, H$$_{4}$$D$$_{2}$$$$^{+}$$, and H$$_{2}$$D$$_{4}$$$$^{+}$$ in solid parahydrogen

固体パラ水素中におけるH$$_{6}$$$$^{+}$$, H$$_{5}$$D$$^{+}$$, H$$_{4}$$D$$_{2}$$$$^{+}$$, H$$_{2}$$D$$_{4}$$$$^{+}$$の電子スピン共鳴分光

熊谷 純*; 稲垣 宏*; 刈谷 進*; 牛田 高広*; 清水 裕太*; 熊田 高之  

Kumagai, Jun*; Inagaki, Hiroshi*; Kariya, Susumu*; Ushida, Takahiro*; Shimizu, Yuta*; Kumada, Takayuki

$$gamma$$線照射した固体para-H$$_{2}$$中には4本線のシャープなESR信号、para-H$$_{2}$$-HD(1mol%)中及びpara-H$$_{2}$$-ortho-D$$_{2}$$(1mol%)中では50本を超えるESR信号が新たに観測された。われわれは理論計算との比較からこれらの信号がH$$_{2}$$$$^{+}$$-core H$$_{6}$$$$^{+}$$イオン及びその同位体H$$_{5}$$D$$^{+}$$, H$$_{4}$$D$$_{2}$$$$^{+}$$, H$$_{2}$$D$$_{4}$$$$^{+}$$のものであると同定した。われわれはまた同位体置換による同イオンの対称性の乱れ及び、同位体濃縮反応も合わせて観測することに成功した。

We carried out an electron spin resonance (ESR) study on hydrogen ion radicals produced by radiolysis of solid parahydrogen. In addition to quartet ESR lines proposed to be H$$_{2}$$$$^{+}$$-core H$$_{6}$$$$^{+}$$ ions in solid parahydrogen, we newly observed totally more than fifty resolved lines in $$gamma$$-ray irradiated solid para-H$$_{2}$$-ortho-D$$_{2}$$ (1 mol %) and para-H$$_{2}$$-HD (1 mol %) mixtures. We assigned these lines to be isotope substituents of H$$_{2}$$$$^{+}$$-core H$$_{6}$$$$^{+}$$ ions such as H$$_{5}$$D$$^{+}$$, H$$_{4}$$D$$_{2}$$$$^{+}$$, and H$$_{2}$$D$$_{4}$$$$^{+}$$ throughout comparison of their ESR parameters with theoretical results.

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パーセンタイル:54.48

分野:Chemistry, Physical

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