Open AccessXAFS study of copper species stabilized in the interlayer space of layered perovskite oxides
Author(s) -
Kim DongKuk,
Choi ShinHei,
Han YangSu,
Yun Hoseop
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500014539
Subject(s) - xanes , intercalation (chemistry) , copper , extended x ray absorption fine structure , x ray absorption spectroscopy , x ray absorption fine structure , ion , inorganic chemistry , absorption spectroscopy , crystallography , perovskite (structure) , spectral line , materials science , chemistry , crystal structure , spectroscopy , metallurgy , physics , organic chemistry , quantum mechanics , astronomy
New intercalation compounds with Cu 2+ ions in the interlayer of layered perovskite oxides, OA 1‐x Ca 2‐x La x Nb 3 O 1 0 (OA = n ‐octylammonium ion, 0 ≤ x < 1), have been prepared by ion‐exchange reaction, and characterized by means of XRD and XAS. For the detail elucidation of the fine structure of the Cu K‐edge XANES spectra, polarized XAS was applied for the [Cu(en) 2 ] 2+ and Cu 2+ ions intercalated to the single crystal. According to the XANES and EXAFS spectra measured at Cu K‐edge, copper ions are four‐coordinated. In addition, XANES spectra have shown that the charge transfer from host layer to intercalated ions influences on the chemical state of copper ion.