Tilt of N2 molecules physintercalated into C24K and C24Rb

R. Moreh, H. Pinto, Y. Finkelstein, F. Beguin

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5 Scopus citations

Abstract

The intercalation of molecular N2 into C24X (X = K, Rb) has been studied using the nuclear resonance photon scattering (NRPS) technique. We found that, in the physintercalated state, the nitrogen resides in the alkali planes, in a molecular form, with the molecular symmetry axis almost parallel to the graphene basal planes. In C24K, the N2 molecules are only intercalated below 200 K, while in the case of C24Rb, the physintercalation process starts at room temperature and the amount of intercalated N2 increases with decreasing T, reaching saturation at around 130 K. These samples were also studied using n-diffraction and the N2 "small" diameter, at 120 K, was found to be 0.290 nm in the (C24K + N2) system and slightly smaller, 0.279 nm, in the (C24Rb + N2) system. This difference in the measured diameters could also be attributed to a smaller tilt angle of the N2 molecule in C24Rb as compared to that in C24K.

Original languageEnglish
Pages (from-to)909-913
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume57
Issue number6-8
DOIs
StatePublished - 1 Jan 1996

Keywords

  • A. Graphite intercalation compounds
  • B. N adsorption
  • C. n-diffraction
  • D. Molecular orientation
  • Nuclear resonance photon scattering

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