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Journal Articles

Electron spin resonance study on H$$_6$$$$^+$$, H$$_5$$D$$^+$$, H$$_4$$D$$_2$$$$^+$$, and H$$_2$$D$$_4$$$$^+$$ in solid parahydrogen

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

Journal of Chemical Physics, 127(2), p.024505_1 - 024505_13, 2007/07

https://doi.org/10.1063/1.2748046

We carried out an electron spin resonance (ESR) study on hydrogen ion radicals produced by radiolysis of solid parahydrogen. We newly observed totally more than fifty resolved lines in irradiated solid parahydrogens. 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. These results show conclusive evidence that H$$_2$$$$^+$$-core H$$_6$$$$^+$$ ions are produced and stably trapped in irradiated solid hydrogens. We also observed a lowering symmetry on electron wave function in H$$_5$$D$$^+$$ and H$$_4$$D$$_2$$$$^+$$, and isotope-substitution reactions such as H$$_6$$$$^+$$+D$$_2$$$$rightarrow $$H$$_4$$D$$_2$$$$^+$$+H$$_2$$ and H$$_6$$$$^+$$+HD$$rightarrow $$H$$_5$$D$$^+$$+H$$_2$$.

Journal Articles

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

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

Journal of Chemical Physics, 127(2), p.024505_1 - 024505_13, 2007/07

https://doi.org/10.1063/1.2748046
 Times Cited Count：17 Percentile：51.91(Chemistry, Physical)

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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