STRUCTURES OF FE(III) COMPLEXES WITH EDTA AND EDDDA IN AQUEOUS-SOLUTION BY EXAFS AND XANES

被引:15
作者
SAKANE, H
WATANABE, I
ONO, K
IKEDA, S
KAIZAKI, S
KUSHI, Y
机构
[1] RYUKOKU UNIV,FAC SCI & TECHNOL,DEPT MAT CHEM,OTSU,SHIGA 52021,JAPAN
[2] OSAKA UNIV,COLL GEN EDUC,DEPT CHEM,TOYONAKA,OSAKA 560,JAPAN
关键词
D O I
10.1016/S0020-1693(00)88135-9
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The Fe K-edge X-ray absorption spectra of Fe(III) complexes with EDTA (ethylenediaminetetraacetic acid) and EDDDA (ethylenediamine-N,N-diacetic-N,N'-dipropionic acid) in weakly acidic or neutral aqueous solutions are measured. The spectra of powdered crystalline samples of these complexes are also measured as the reference materials. The comparisons of the XANES spectra, including their pre-edge peak, and the EXAFS Fourier transforms conclude that in aqueous solution a seven-coordinate structure is predominant for the Fe(III)-EDTA complex and a six-coordinate one for the Fe(III)-EDDDA complex.
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页码:67 / 70
页数:4
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