13C NMR determination of the in‐plane carbon–carbon bond length in graphite intercalation compounds

1984 ◽  
Vol 80 (4) ◽  
pp. 1708-1709 ◽  
Author(s):  
Gerald Ray Miller ◽  
Chester F. Poranski ◽  
Henry A. Resing
Keyword(s):  
Bond Length ◽  
13C Nmr ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Graphite Intercalation

Stoichiometric Determination of Graphite Intercalation Compounds Using Rutherford Backscatiering Spectrometry

1983 ◽  
Vol 27 ◽  
Author(s):  
L. Salamanca-Riba ◽  
B.S. Elman ◽  
M.S. Dresselhaus ◽  
T. Venkatesan
Keyword(s):  
Experimental Error ◽  
Rutherford Backscattering Spectrometry ◽  
Rutherford Backscattering ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
X Ray ◽  
Donor And Acceptor ◽  
Graphite Intercalation ◽  
Non Destructive

ABSTRACTRutherford backscattering spectrometry (RBS) is used to characterize the stoichiometry of graphite intercalation compounds (GIC). Specific application is made to several stages of different donor and acceptor compounds and to commensurate and incommensurate intercalants. A deviation from the theoretical stoichiometry is measured for most of the compounds using this non-destructive method. Within experimental error, the RBS results agree with those obtained from analysis of the (00ℓ) x-ray diffractograms and weight uptake measurements on the same samples.

13C NMR Chemical Shifts of Oriented Cesium-Graphite Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
D.D. Dominguez ◽  
H.A. Resing ◽  
C.F. Poranski ◽  
J.S. Murday
Keyword(s):  
13C Nmr ◽  
Chemical Shifts ◽  
Stage I ◽  
Intercalation Compounds ◽  
Axially Symmetric ◽  
Fourth Stage ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation ◽  
Subsequent Layer ◽  
C Nmr

ABSTRACTThe 13C NMR lines of the stage I cesium graphite compound are broad (ca. 600 Hz) at all orientations, reflecting immobile Cs intercalation; in terms of an axial pattern the principal values are δ11 = 95 ± 5 and δ┴6 = 130 ± 6 ppm. For third and fourth stage compounds the bounding layers give a relatively sharp (60–100 Hz) pair of lines at all orientations, thus demonstrating axially symmetric shift tensors: δ11 = 66 and 56 ppm; δ┴ = 159 and 149 ppm, respectively. These well defined axial tensors reflect atomic motions in the incommensurate Cs layer; the pair of lines may arise from the two classes of carbons - those above carbons in a subsequent layer and those above hexagon centers. Lines of inner layers are sharpest for special orientations →c II →B0 and →c ┴ →B0.

Electron Microscopy of Graphite Intercalation Compounds

1982 ◽  
Vol 40 ◽  
pp. 544-545
Author(s):  
G. Timp ◽  
L. Salamanca-Riba ◽  
L.W. Hobbs ◽  
G. Dresselhaus ◽  
M.S. Dresselhaus
Keyword(s):  
Electron Microscopy ◽  
Phase Transitions ◽  
Domain Wall ◽  
Intercalation Compounds ◽  
Lattice Plane ◽  
Wall Model ◽  
Graphite Intercalation Compounds ◽  
Fundamental Symmetry ◽  
Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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