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Raman study of the temperature-induced decomposition of the two-dimensional rhombohedral polymer of C60 and the intermediate states formed
- Source :
- Carbon. 48:2974-2979
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Raman spectra of single crystalline two-dimensional rhombohedral (2D-R) polymer of C 60 were measured at ambient conditions after its high temperature treatment (HTT) in order to study the polymer decomposition process. The data obtained indicate that the 2D-R polymer remains stable after 0.5 h treatment up to ∼503 K, while at higher temperatures a material transformation takes place. New Raman lines appear in the Raman spectrum after HTT in the range of 513–553 K, related to the A g (2) pentagon pinch (PP) mode of 2D tetragonal-like (2D-T-like) and 1D orthorhombic-like (1D-O-like) oligomers as well as to C 60 dimers and monomers, typical for an intermediate state of partially decomposed 2D-R polymer. Above 553 K, the material changes completely and its new composition is dominated by C 60 monomers with some possible inclusion of C 60 dimers. The activation energy of the 2D-R polymer decomposition, obtained from the dependence of the decomposition time on the treatment temperature, is E A = 1.76 ± 0.07 eV/molecule.
- Subjects :
- chemistry.chemical_classification
Fullerene
Chemical process of decomposition
General Chemistry
Polymer
Activation energy
Decomposition
chemistry.chemical_compound
symbols.namesake
Crystallography
Monomer
chemistry
symbols
Organic chemistry
Intermediate state
General Materials Science
Raman spectroscopy
Subjects
Details
- ISSN :
- 00086223
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Carbon
- Accession number :
- edsair.doi...........6b03251bcdc085cceda931175a72a006