Mössbauer study on solid state photolysis of alkali tris(malonato)ferrates(III) |
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| Authors: | B. S. Randhawa |
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| Affiliation: | (1) Department of Chemistry, Guru Nanak Dev University, 143005 Amritsar, India |
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| Abstract: | Solid state photolysis of alkali tris(malonato)ferrates(III), i.e., M3[Fe(CH2C2O4)3]xH2O (M=Li, Na, K, NH4) has been studied employing Mössbauer, infrared and reflectance spectroscopic techniques. The complexes were irradiated for 300 hours using a medium pressure mercury vapour lamp of 250 W, Photodecomposition led to the formation of an iron(II) intermediate, M2[FeII(CH2C2O4)2(H2O)2] (M=Li, Na, K) which on prolonged standing in air oxidized to M[FeIII(CH2C2O4)2(H2O)2]. However, in case of ammonium complex, FeIICH2C2O4·2H2O once formed remained stable. The extent of photoreduction showed the sequence: NH4, K>Li>Na. The results have been compared with those of alkali tris (oxalato) ferrates(III). |
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