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Author Lipp, M. J. ♦ Yoo, C. -S. ♦ Cynn, H. ♦ Herberg, J. L. ♦ Maxwell, R. S. ♦ Nicol, M. F.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ MATERIALS SCIENCE ♦ CARBON ♦ CARBON MONOXIDE ♦ CHEMICAL REACTIONS ♦ DIAMONDS ♦ ENERGY DENSITY ♦ GASES ♦ HEATING ♦ LASERS ♦ OXIDATION ♦ POLYMERIZATION ♦ POLYMERS ♦ REDUCTION ♦ SYNTHESIS
Abstract We have studied pressure-induced chemical reactions in carbon monoxide using both a diamond anvil cell and a modified large volume press. Our spectroscopic data reveal that carbon monoxide disproportionates into molecular CO{sub 2} and a solid lactone-type polymer; photochemically above 3.2 GPa, thermochemically above 5 GPa at 300 K, or at 3 GPa and {approx}2000 K as achieved by laser heating. The solid product can be recovered at ambient conditions with a high degree of conversion, measured to be up to 95% of the original CO. Its fundamental chemical structure includes {beta}-lactone and conjugated C=C, which can be considered a severely modified polymeric carbon suboxide with open ladders and smaller five-membered rings. The polymer is metastable at ambient conditions, spontaneously liberating CO{sub 2} gases exothermically. We find that the recovered polymer has a high energy density, 1-8 kJ/g, and is very combustible. We estimate the density of recovered CO polymer to be at least 1.65 g/cm{sup 3}.
ISSN 08974756
Educational Use Research
Learning Resource Type Article
Publisher Date 2008-10-02
Publisher Place United States
Journal Chem. Mater.
Volume Number 18
Issue Number 10
Organization Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)


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