High pressure chemistry of substituted acetylenes [electronic resource]
High pressure in situ synchrotron x-ray diffraction experiments were performed on substituted polyacetylenes: tert-butyl acetylene [TBA: (CH₃)₃-C{triple_bond}CH] and ethynyl trimethylsilane [ETMS: (CH₃)₃-Si{triple_bond}CH] to investigate pressure-induced chemical reactions. The starting samples were...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
2011.
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| Summary: | High pressure in situ synchrotron x-ray diffraction experiments were performed on substituted polyacetylenes: tert-butyl acetylene [TBA: (CH₃)₃-C{triple_bond}CH] and ethynyl trimethylsilane [ETMS: (CH₃)₃-Si{triple_bond}CH] to investigate pressure-induced chemical reactions. The starting samples were the low temperature crystalline phases which persisted metastably at room temperature and polymerized beyond 11 GPa and 26 GPa for TBA and ETMS respectively. These reaction onset pressures are considerably higher than what we observed in the shockwave studies (6.1 GPa for TBA and 6.6 GPa for ETMS). Interestingly, in the case of ETMS, it was observed with fluid ETMS as starting sample, reacts to form a semi-crystalline polymer (crystalline domains corresponding to the low-T phase) at pressures less than ≈2 GPa. Further characterization using vibrational spectroscopy is in progress. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/25/2011. "la-ur-11-00508" " la-ur-11-508" Dynamic Phenomena under extremes ; January 27, 2011 ; Austin, TX. Robbins, David; Sheffield, Stephen; Chellappa, Raja; Dattelbaum, Dana. Los Alamos National Laboratory (LANL) |