Synthesis and characterization of diiron(III)-substituted silicotungstate, [γ(1,2)-SiW10{Fe(OH2)}2O38]6-

被引：60

作者：

Nozaki, C

Kiyoto, I

Minai, Y

Misono, M

Mizuno, N ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[2] Musashi Univ, Fac Humanities, Ctr Arts & Sci, Nerima Ku, Tokyo 1760011, Japan

来源：

INORGANIC CHEMISTRY | 1999年 / 38卷 / 25期

关键词：

D O I：

10.1021/ic9902065

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The full details of synthesis and characterization of diiron(III)-substituted gamma-Keggin silicotungstate, [gamma(1,2)-SiW10{Fe(OH2)}(2)O-38](6-) (abbreviated as I) were reported. This complex was synthesized by the reaction of the lacunary [gamma-SiW10O36](8-) With Fe(NO3)(3) in an acidic aqueous solution and isolated as the tetra-n-butylammonium salt (TBA-I). TEA-I has been characterized by infrared, Raman, W-183 NMR, W-visible, Mossbauer, and ESR spectroscopy, TG/DTA, FAB-mass, and magnetic susceptibility measurements, elemental analysis, and acid/base titration. The W-183 NMR, infrared, Raman, and UV-visible spectroscopy indicated that I has a gamma-Keggin structure with C-2v symmetry. It was shown by the magnetic susceptibility measurement and Mossbauer, ESR, and UV-visible spectroscopy that I shows an antiferromagnetic coupling of the two high-spin Fe3+ centers.

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页码：5724 / 5729

页数：6

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