Sökning: onr:"swepub:oai:DiVA.org:umu-25838" >
Polymeric phases of...
Polymeric phases of C60
-
- Wågberg, Thomas (författare)
- Umeå universitet,Institutionen för fysik
-
- Persson, Per-Axel (författare)
- Umeå universitet,Institutionen för fysik
-
- Sundqvist, Bertil (författare)
- Umeå universitet,Institutionen för fysik
-
visa fler...
-
- Jacobsson, Per (författare)
- Umeå universitet,Institutionen för fysik
-
visa färre...
-
(creator_code:org_t)
- Pennington, NJ : The Electrochemical Society, 1997
- 1997
- Engelska.
-
Ingår i: Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, vol. 5. - Pennington, NJ : The Electrochemical Society. - 1566771927 ; , s. 674-679
- Relaterad länk:
-
https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- We have investigated the "low" pressure region where C60 can be transformed into polymeric chains or clusters. To learn more about the polymerization process we have treated pristine C60 at several different temperatures under hydrostatic pressures in silicone oil. We found that the reaction rate varied with temperature. Above 520 K at 1.0 GPa similar and high polymer fractions were obtained in all samples, but at 497 K the polymer fraction was only 10% after three hours, as indicated by the shift of the intensity of the pentagonal pinch mode in the Raman spectrum. Also, samples treated at the same pressure and temperature but with different thermal pre-history showed different degrees of polymerization. We have also found a correlation between the shift of the pentagonal pinch mode in the Raman spectrum to 1463 /cm and the intermolecular vibrational mode at 97 /cm. We therefore make the conclusion that the shift of the pentagonal pinch mode to 1463 /cm corresponds to the presence of dimers in the sample.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Fullerenes
- C60
- high pressure synthesis
- polymerization
- polymer chains
- dimers
- Raman spectroscopy
- Raman spectra
- Condensed matter physics
- Kondenserade materiens fysik
- fysik
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
Hitta via bibliotek
Till lärosätets databas