Photoelectron spectroscopy of coordination compounds. II. Palladium complexes

Abstract

The energies of the 3da/, and 3da/, levels have been determined for palladium and 13 of its compounds. The measured energies are related t o electronegativity differences between the palladium and the ligand donor atoms except in those cases where the ligand is a ?r acceptor. Ligands which are K acceptors cause greater energy level shifts since they permit greater depletion of electronic charge from the palladium. The energies of the K(2s) and P(2p) levels measured for several complexes were found to be nearly constant. The energy of the Br(3ps/,) level was lowered somewhat when the bromine occupied a bridging position in PdBrZ. The observed shifts can be "explained" by a combination of electronegativity and ?r-bonding effects. T h e cobalt(II1) complex L' = [Co( (C~H~)ZP(CHZ)ZP(C~H;)Z}Z(CN)Z] + acts as positively charged ligand giving compounds of the stoichiometry M(L+)XI, where M = Mn(II), F e ( I I ) , Co(II), N i ( I I ) , or Zn(I1) and X = halogen or pseudohalogen.On the basis of their electronic and vibrational spectra, magnetic susceptibilities, and X-ray diffraction patterns, these compounds zre formulated as pseudotetrahedral zwitterion complexes in which the cobalt(II1) cation is bound to MX3moieties through the nitrogen atom of one cyanide group.

Simple preparation of Pd-NP/polythiophene nanospheres for heterogeneous catalysis

“…Interestingly, relatively small amount of Pd(II) species compared to Pd(0) species was observed. The Pd core 3d 5/2 and 3d 3/2 level signals found at 336.32 eV and 341.57 eV, respectively, for Pd(0) are very similar to the known values of the fcc Pd(0) species [23]. Pd(II) 3d 5/2 and 3d 3/2 level signals were found at 338.62 eV and 344.92 eV, respectively, possibly reflecting the incomplete reduction of the PdCl 4 2À precursor into Pd(0).…”

An Efficient Palladium Catalyst System for the Oxidative Carbonylation of Glycerol to Glycerol Carbonate

“…Figure 6 displays the Pd binding energy of PdCl 2 (phen) and PdCl 2 (phen)@Y, which exhibited two peaks centered at 342.6 and 337.1 eV assigned to Pd 3d 3/2 and Pd 3d 5/2 , respectively. [18] This result was similar to that of PdCl 2 (phen), which implies that the oxidation state of Pd is +2 and that there is a coordination interaction between Pd and phen.…”

Preparation of Pd/GO/Ti electrode and its electrochemical degradation for 2,4-dichlorophenol

“…This illustrated that palladium was successfully loaded on the electrode surface. The palladium on the Pd/GO/Ti electrodes was zero valence [31,32]. From the simulation, 4 typical peak of carbon could be found in the scanning spectra of narrow C1s, including the sp2 hybridization peak from C-C at 284.7 eV, the C-O peak from C-O-H at 285.6 eV, the C-O-C peak in epoxide group at 286.6 eV, the conjugate peak of C = O at 289.1 eV (Fig.…”