X-ray photoelectron spectra of cobalt compounds

XPS Spectra of Spin-Triplet Cobalt(III) Complexes

“…The separation between the cobalt 2P1/2 and cobalt 2P3/2 main peaks has been discussed with reference to the spin state of the cobalt [1,3,4]. Thus, high spin cobalt(III) species appear generally to show a Co 2P1/2-C0 2P3/2 separation of about 1 eV larger than is found for the diamagnetic cobalt(III) species.…”

“…In addition to the many experimental contributions, a substantial amount of theoretical work has appeared which is directed at the goal of understanding the details of the XPS spectra of transition metal systems. The XPS properties of a large number of cobalt complexes have been reported, including examples from each of the commonly occuring electronic states for cobalt, high and low spin cobalt(II) and low spin cobalt(III) [1][2][3][4][5][6][7][8][9][10]. In general each electronic state demonstrates rather characteristic and distinguishing features in the XPS spectrum.…”

Surface Chemistry of Cobalt in Calcined Cobalt-Kaolinite Materials

“…Core electron (2p) spectra for low spin (Co(II) have a Co 2p,/2-Co 2p:~/2 splitting of approximately 15.0-15.3 eV and satellite structure of low intensity (Frost et al, 1974;Briggs and Gibson, 1974). For low-spin Co(II) the main 2pw2 photopeak is broadened and shows (Frost et al, 1974;Briggs and Gibson, 1974) evidence of two peaks in the 2pe~2 region arising from multiplet splitting.…”

“…For low-spin Co(II) the main 2pw2 photopeak is broadened and shows (Frost et al, 1974;Briggs and Gibson, 1974) evidence of two peaks in the 2pe~2 region arising from multiplet splitting. The features characteristic of low spin Co(II) are not prominent in the Co 2p spectra measured for the calcined cobalt-kaolinite materials (Figure 1).…”

“…The shake-up satellite structure for cobalt is associated with charge-transfer excitation of the type, ligand ~ metal (Frost et al, 1974;Kim, 1975;Brisk and Baker, 1975). The energy separation between the satellite peak and the main 2p photopeak is related to the bonding nature of cobalt.…”