Preparation of novel graphite intercalation compounds of CxMF6using O2MF6 (M=As, Sb).
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Accession number;99A0711858
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| Title;Preparation of novel graphite intercalation compounds of CxMF6using O2MF6 (M=As, Sb). |
| Author;
OKINO FUJIO
(Shinshu Univ., Text. Sci. and Technol.)
MARUYAMA KAZUTO
(Shinshu Univ., Text. Sci. and Technol.)
KAWAWAKI MASATSUGU
(Shinshu Univ., Text. Sci. and Technol.)
KAWASAKI SHINJI
(Shinshu Univ., Text. Sci. and Technol.)
TOHARA HIDEKAZU
(Shinshu Univ., Text. Sci. and Technol.)
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Journal Title;Fusso Kagaku Toronkai Koen Yoshishu
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Journal Code:F0135B
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ISSN:
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VOL.22nd;NO.;PAGE.98-99(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The ideal compositions for the nesting of AsF6- in the stage-1 CxAsF6 graphite intercalation compounds (GICs) have been determined to be C14AsF6 at room temperature and C16AsF6 below 170 K, where the fluoride ligands of AsF6- are nested in contiguous three-fold sets of carbon hexagons of the graphite. The exact ratios of C:As:F = 14(16):1:6, however, are difficult to attain owing to the high reactivity of AsF5/F2. AsF5, with or without F2, slowly but steadily reacts with the inner wall of SUS316 vacuum line, and the reaction scheme xC + AsF5 + 1/2F2 -> CxAsF6 is not straightforward since F2 reacts with CxAsF6. In the course of the study on nestled AsF6-, it was found that it was the direct solid-solid reaction of O2AsF6 with graphite yields CxAsF6. We have recently found that this reaction is much faster than it had been thought at the time; the reaction proceed essentially within a matter of 10 seconds when an effective mixing of the solids is applied. This reaction scheme was extended to graphite/O2SbF6 system and GICs of hexafluoroantimonate are synthesized for the first time. In this work kinetic, compositional and structural studies of CxAsF6 and CxSbF6 have been investigated. (author abst.) |
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