XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1)

Yoshihiro Kubozono; Tamotsu Fujimoto; Hironobu Maeda; Akiko Hirano; Setsuo Kashino; Kokichi Oshima; Hitoshi Yamazaki; Hiroyuki Ishida; Tadao Ishii; Shuichi Emura; Kiyonori Kato

doi:10.1016/0921-4534(93)90790-W

XAFS studies of the oxidation process in Rb_xCs_yC₆₀ (x=3, y=0 and x=2, y=1)

Yoshihiro Kubozono, Tamotsu Fujimoto, Hironobu Maeda, Akiko Hirano, Setsuo Kashino, Kokichi Oshima, Hitoshi Yamazaki, Hiroyuki Ishida, Tadao Ishii, Shuichi Emura, Kiyonori Kato

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8 Citations (Scopus)

Abstract

EXAFS measurements of the alkali-doped fullerence superconductors, Rb_xCs_yC₆₀ (x=3, y=0 and x=2, y=1 with T_c=30 and 31 K, respectively), have been made at the Rb K-edge as a function of exposure time to O₂ gas. The distances r_Rb-C=3.35±0.02 and 3.31±0.02 Å were obtained for pristine Rb_xCs_yC₆₀ of x=3, y=0 and x=2, y=1, respectively, in good agreement with the reported value of 3.33 Å at the tetrahedral site determined by X-ray diffraction study. The analysis of the Rb-O EXAFS in Rb₃C₆₀ exposed to O₂ for 40 h gives r_Rb-O=2.89±0.05 Å and N=4±1, consistent with the crystallographic values of rubidium oxide (Rb₂O: r_Rb-O=2.91 Å and N=4 at room temperature). The result indicates that the Rb in Rb_xCs_yC₆₀ is converted into Rb₂O through the oxidation.

Original language	English
Pages (from-to)	21-26
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	217
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(93)90790-W
Publication status	Published - Nov 10 1993

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(93)90790-W

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title = "XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1)",

abstract = "EXAFS measurements of the alkali-doped fullerence superconductors, RbxCsyC60 (x=3, y=0 and x=2, y=1 with Tc=30 and 31 K, respectively), have been made at the Rb K-edge as a function of exposure time to O2 gas. The distances rRb-C=3.35±0.02 and 3.31±0.02 {\AA} were obtained for pristine RbxCsyC60 of x=3, y=0 and x=2, y=1, respectively, in good agreement with the reported value of 3.33 {\AA} at the tetrahedral site determined by X-ray diffraction study. The analysis of the Rb-O EXAFS in Rb3C60 exposed to O2 for 40 h gives rRb-O=2.89±0.05 {\AA} and N=4±1, consistent with the crystallographic values of rubidium oxide (Rb2O: rRb-O=2.91 {\AA} and N=4 at room temperature). The result indicates that the Rb in RbxCsyC60 is converted into Rb2O through the oxidation.",

author = "Yoshihiro Kubozono and Tamotsu Fujimoto and Hironobu Maeda and Akiko Hirano and Setsuo Kashino and Kokichi Oshima and Hitoshi Yamazaki and Hiroyuki Ishida and Tadao Ishii and Shuichi Emura and Kiyonori Kato",

year = "1993",

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doi = "10.1016/0921-4534(93)90790-W",

language = "English",

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TY - JOUR

T1 - XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1)

AU - Kubozono, Yoshihiro

AU - Fujimoto, Tamotsu

AU - Maeda, Hironobu

AU - Hirano, Akiko

AU - Kashino, Setsuo

AU - Oshima, Kokichi

AU - Yamazaki, Hitoshi

AU - Ishida, Hiroyuki

AU - Ishii, Tadao

AU - Emura, Shuichi

AU - Kato, Kiyonori

PY - 1993/11/10

Y1 - 1993/11/10

N2 - EXAFS measurements of the alkali-doped fullerence superconductors, RbxCsyC60 (x=3, y=0 and x=2, y=1 with Tc=30 and 31 K, respectively), have been made at the Rb K-edge as a function of exposure time to O2 gas. The distances rRb-C=3.35±0.02 and 3.31±0.02 Å were obtained for pristine RbxCsyC60 of x=3, y=0 and x=2, y=1, respectively, in good agreement with the reported value of 3.33 Å at the tetrahedral site determined by X-ray diffraction study. The analysis of the Rb-O EXAFS in Rb3C60 exposed to O2 for 40 h gives rRb-O=2.89±0.05 Å and N=4±1, consistent with the crystallographic values of rubidium oxide (Rb2O: rRb-O=2.91 Å and N=4 at room temperature). The result indicates that the Rb in RbxCsyC60 is converted into Rb2O through the oxidation.

AB - EXAFS measurements of the alkali-doped fullerence superconductors, RbxCsyC60 (x=3, y=0 and x=2, y=1 with Tc=30 and 31 K, respectively), have been made at the Rb K-edge as a function of exposure time to O2 gas. The distances rRb-C=3.35±0.02 and 3.31±0.02 Å were obtained for pristine RbxCsyC60 of x=3, y=0 and x=2, y=1, respectively, in good agreement with the reported value of 3.33 Å at the tetrahedral site determined by X-ray diffraction study. The analysis of the Rb-O EXAFS in Rb3C60 exposed to O2 for 40 h gives rRb-O=2.89±0.05 Å and N=4±1, consistent with the crystallographic values of rubidium oxide (Rb2O: rRb-O=2.91 Å and N=4 at room temperature). The result indicates that the Rb in RbxCsyC60 is converted into Rb2O through the oxidation.

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XAFS studies of the oxidation process in Rb_xCs_yC₆₀ (x=3, y=0 and x=2, y=1)

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