Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60

S. A. Myers, R. A. Assink, J. E. Schirber, Douglas A Loy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)

Abstract

We have used 13C magic-angle spinning (MAS) nuclear magnetic resonance (NMR) to characterize the structure and rotational dynamics of C60 containing oxygen molecules located in the interstitial sites of the fcc lattice. Under normal conditions, a narrow peak at 143.7 ppm is observed for C60. When exposed to oxygen at moderate pressures, several additional resonances appear in the 13C MAS NMR spectrum. These secondary resonances are shifted downfield from the main peak at 143.7 ppm and are due to the Fermi-contact interaction of the paramagnetic oxygen molecules with the 13C nuclear spins. The presence of oxygen depresses the orientational ordering transition by ca. 20 K as observed by DSC. The spin-lattice relaxation time (T1) of each secondary peak shows a minimum near the ordering transition, indicating that this transition is not dependent on the number of oxygen molecules surrounding an individual C60 molecule. The T1 due to paramagnetic relaxation, normalized by the number of surrounding oxygen molecules, is constant. This observation demonstrates that within a given sample, the dynamics of C60 molecules are independent of the number of surrounding oxygen molecules.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages505-509
Number of pages5
Volume359
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Nov 30 1994

Other

OtherProceedings of the 1994 MRS Fall Meeting
CityBoston, MA, USA
Period11/28/9411/30/94

Fingerprint

Intercalation
Oxygen
Molecules
Magic angle spinning
Nuclear magnetic resonance
Spin-lattice relaxation
Relaxation time

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Myers, S. A., Assink, R. A., Schirber, J. E., & Loy, D. A. (1995). Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60. In Materials Research Society Symposium - Proceedings (Vol. 359, pp. 505-509). Materials Research Society.

Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60. / Myers, S. A.; Assink, R. A.; Schirber, J. E.; Loy, Douglas A.

Materials Research Society Symposium - Proceedings. Vol. 359 Materials Research Society, 1995. p. 505-509.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Myers, SA, Assink, RA, Schirber, JE & Loy, DA 1995, Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60. in Materials Research Society Symposium - Proceedings. vol. 359, Materials Research Society, pp. 505-509, Proceedings of the 1994 MRS Fall Meeting, Boston, MA, USA, 11/28/94.
Myers SA, Assink RA, Schirber JE, Loy DA. Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60. In Materials Research Society Symposium - Proceedings. Vol. 359. Materials Research Society. 1995. p. 505-509
Myers, S. A. ; Assink, R. A. ; Schirber, J. E. ; Loy, Douglas A. / Effect of O2 intercalation on the rotational dynamics and the ordering transition of C60. Materials Research Society Symposium - Proceedings. Vol. 359 Materials Research Society, 1995. pp. 505-509
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