TY - JOUR
T1 - XPS study of oriented organic molecules. The single crystal of an azobenzene-containing alkyl ammonium amphiphile
AU - Nakayama, Youichi
AU - Takahagi, Takayuki
AU - Soeda, Fusami
AU - Ishitani, Akira
AU - Shimomura, Masatsugu
AU - Okuyama, Kenji
AU - Kunitake, Toyoki
PY - 1988/9
Y1 - 1988/9
N2 - We have observed the angle-dependent XPS (X-ray photoelectron spectroscopy) N 1s spectral change of a single crystal of azobenzene-containing ammonium amphiphile C12AzoC5N+Br-. By comparing the calculated intensity ratio of the azo-group nitrogens against the ammonium nitrogen with that experimentally observed, the N 1s spectral change has successfully been correlated with the stacked bilayer model in the outermost surface of the crystal. With the assumption that the molecular axis inclines about 30 ° to the layer surface as determined by X-ray diffraction measurement, the N 1s photoelectron (about 850 eV in kinetic energy) mean-free-path was estimated to be about 24 Å. The value agreed well with theoretical values. We have successfully confirmed that XPS has potentiality for analyzing molecular orientation besides conventional elemental and functional group analyses.
AB - We have observed the angle-dependent XPS (X-ray photoelectron spectroscopy) N 1s spectral change of a single crystal of azobenzene-containing ammonium amphiphile C12AzoC5N+Br-. By comparing the calculated intensity ratio of the azo-group nitrogens against the ammonium nitrogen with that experimentally observed, the N 1s spectral change has successfully been correlated with the stacked bilayer model in the outermost surface of the crystal. With the assumption that the molecular axis inclines about 30 ° to the layer surface as determined by X-ray diffraction measurement, the N 1s photoelectron (about 850 eV in kinetic energy) mean-free-path was estimated to be about 24 Å. The value agreed well with theoretical values. We have successfully confirmed that XPS has potentiality for analyzing molecular orientation besides conventional elemental and functional group analyses.
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U2 - 10.1016/0169-4332(88)90449-7
DO - 10.1016/0169-4332(88)90449-7
M3 - Article
AN - SCOPUS:0024067860
VL - 33-34
SP - 1307
EP - 1316
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
IS - C
ER -