Influence of the pressure–temperature treatment on the polymerization of C60 single crystals at 2 GPa–700 K

Autor:	Thomas Wågberg, Roger Moret, Bertil Sundqvist
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Diffraction Fullerene Materials science Dimer General Chemistry Polymer Pressure temperature chemistry.chemical_compound symbols.namesake Tetragonal crystal system Crystallography chemistry Polymerization symbols General Materials Science Raman spectroscopy
Zdroj:	Carbon. 43:709-716
ISSN:	0008-6223
DOI:	10.1016/j.carbon.2004.10.039
Popis:	X-ray diffraction and Raman spectroscopy have been used to characterize the structures obtained when C60 single crystals are treated at 2 GPa–700 K. Two different experimental procedures have been applied: the temperature is raised before the pressure is applied, or the opposite. The “heating-then-pressing” path leads to the tetragonal polymer structure (P42/mmc) together with a minor fraction of rhombohedral structure, which confirms previous results. In contrast, the “pressing-then-heating” path leads to a different state presenting similarities with both the rhombohedral and the disordered dimer structures. The results are discussed in light of the orientational and dynamical aspects of the C60 polymerization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ab3a7fab49c6b2d14dadbd2a529f6d5d https://doi.org/10.1016/j.carbon.2004.10.039 Zobrazit plný text záznamu Full Text from ScienceDirect