Letter abstract
Nature Materials 4, 211 - 215 (2005)
doi:10.1038/nmat1321
Subject Categories: Design synthesis and processing | Characterisation and analytical techniques
High-energy-density extended CO solid
Magnus J. Lipp1, William J. Evans1, Bruce J. Baer1 and Choong-Shik Yoo1
Covalently bonded extended phases of molecular solids made of first- and second-row elements at high pressures are a new class of materials with advanced optical, mechanical and energetic properties. The existence of such extended solids has recently been demonstrated using diamond anvil cells in several systems, including nitrogen1, carbon dioxide2 and carbon monoxide3. However, the microscopic quantities produced at the formidable high-pressure/temperature conditions have limited the characterization of their predicted novel properties, including high-energy content. In this paper, we present experimental evidence that these extended low-Z solids are indeed high-energy-density materials, by milligram-scale high-pressure synthesis, recovery and characterization of polymeric CO (p-CO). Our spectroscopic data reveal that p-CO is a random polymer made of lactonic entities and conjugated C=C with an energy content rivalling or exceeding that of HMX (cyclo-tetramethylene tetranitramine, a commonly used conventional high explosive). Solid p-CO explosively decomposes to CO2 and glassy carbon, and thus might be used as an advanced energetic material.
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
Correspondence to: Choong-Shik Yoo1 e-mail: Yoo1@llnl.gov
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