X-ray photoelectron spectroscopy of nickel compounds

XPS study of 5-chloro-1,2,3-benzotriazole adsorption on nickel surface

“…Ni2p 3/2 peak maximums of individual compounds (Fig. 1) fairly correspond to those given in other publications [20][21][22]. Table 1 presents the measured XPS peak positions of corresponding elements.…”

X-Ray Photoelectron Spectroscopic Study of Cobalt(II) and Nickel(II) Sorbed on Hectorite and Montmorillonite

“…Similar binding energies were obtained for the Steetley montmorillonite treated with NiC12 (856.3 eV) (Table 4) or NiSO, (856.2 eV) ( Table 5). The values are consistent with octrahedral coordination (Tolman et al, 1973;Matienzo et al, 1973); the data are inconsistent with the presence of NiO or Ni(OH)2 as surface species (McIntyre and Cook, 1975). The binding energies were, however, less than that observed for Ni 2+ on chlorite (856.6 eV) by Koppelman and Dillard (1977).…”

“…Tolman et al (1973) in a study of Ni compounds established that Ni 2 § gives a characteristic Ni 2p3/2 photopeak between 854.9 and 857.4 eV. Others (e.g., Matienzo et aL, 1973) have proposed that binding energies in the range 855.0 to 857.5 eV are characteristic ofoctahedral Ni 2 § as opposed to tetrahedral or square planar NP § which give lesser values. Thus, the species sorbed onto the hectorite probably contained Ni 2+ in an octahedral environment; furthermore, the observed binding energies were close to the 857.5 eV value determined by Matienzo et al (1973) for [Ni(H20)6] 2+ in [Ni(H20)6 ] SO4.…”

“…Others (e.g., Matienzo et aL, 1973) have proposed that binding energies in the range 855.0 to 857.5 eV are characteristic ofoctahedral Ni 2 § as opposed to tetrahedral or square planar NP § which give lesser values. Thus, the species sorbed onto the hectorite probably contained Ni 2+ in an octahedral environment; furthermore, the observed binding energies were close to the 857.5 eV value determined by Matienzo et al (1973) for [Ni(H20)6] 2+ in [Ni(H20)6 ] SO4. The binding energy for Ni 2+ on hectorite was found to be close to that for octahedrally coordinated Ni 2+ on lizardite (857.0 eV), as determined by Koppelman and Dillard (1977).…”

X-Ray Photoelectron Spectroscopy of Nickel(II) Schiff Base Complexes with Acyl Substituents

“…Matienzo et al 4 have reported that the Ni 2p XPS's of tetrahedrally four-coordinated and octahedrally six-coordinated nickel(II) complexes have satellite peaks in the range of higher energy compared with each of the two main peaks, though those of square planar complexes with diamagnetism do not. These satellite peaks are now said to be due to electrontransfer transitions, which mean the shake up transitions from 3d to 4s of metal orbitals and the charge transfer transitions from metal 3d orbitals to anti-bonding orbitals of ligand.…”