Synthesis and XPS Satellite Phenomena of Complexes of the Light Rare Earth Chloride with 2, 3, 11, 12-Tetraphenyl-1, 4, 7, 10, 13, 16-hexaoxa-2, 11-coyclooctadecadiene
Wang Jing-Qiu;Zheng Zhao-Jin;Si Ling Department of Chemistry, Wuhan University, Wuhan
Three new complexes of the light rare earth (Ⅲ) chloride with the titled unsaturated crown ether (L) have been synthesized in the mixed solvent. Elemental analysis indicated that the stoichometry of LnCl_3 with L is 1:1. The core-electron (Ln 3d_(5/2), O 1s, C 1s and Cl 2p) of LnCl_3 and its complexes has been studied by X-ray photoelectron spectra. Satellite phenomena have been observed for Ln 3d_(5/2) signals in the rare earth chloride and complexes. These satellites are discussed in terms of coexcitations of the charge-trasfer type, principally Cl 3p→Ln 4f transitions. The satellites of cerium are due to transition energy greater than zero, the satellites of prasodymium and samarium are due to transition energy smaller than zero. The former ones belong to "shake-up" processes, the later are "shake-down" processes.