If these lines were used for calibration, the symbols Au, Ag, or Cu indicate the respective lines. Gold, silver, and copper are most frequently used as calibrants, and the following binding energies have been used as reference data: Au 4f 7/2=84.00 eV, Ag 3d 5/2=368.27 eV, and Cu 2p 3/2=932.67 eV. In most measurements, strong lines of certain metals were used to calibrate the binding-energy scale. Information is then provided on how the binding-energy scale was calibrated. Information is first given on the conditions of the XPS experiment, including whether an X-ray monochromator was used, the excitation energy (indicated by the anode material if X-ray tube was used or a photon energy from a synchrotron-radiation source), and the overall energy resolution. In some cases, isomers are included separately in this database.Ī scheme that classifies compounds according to broad and specific categories such as inorganic (cations and anions), organic (broad types, compounds, functional groups, and heteroatoms), ligands and ligand centers, and other classes.
The identification number assigned by CAS. In some instances, geometrical information is included. The name of a compound written according to either IUPAC or CAS rules. The asterisk is present only when two or more atoms of the same element are present in different bonding situations. The chemical formula with an asterisk (*) to indicate the specific atom which is being observed. The chemical formula of the compound, written in either the International Union of Pure and Applied Chemistry (IUPAC) or the Chemical Abstracts Service (CAS) notation. The normal chemical symbol for the element which is being observed by photoelectron or Auger-electron spectroscopy.
Data Field Definitions: Descriptions of Data Fields
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