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Water and time dependent interaction of iron(III) with indole-3-acetic acid |
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| Authors: | Krisztina Kovács Virender K Sharma Alexander A Kamnev Ernő Kuzmann Zoltán Homonnay Attila Vértes |
| Institution: | 1.Institute of Chemistry, Laboratory of Nuclear Chemistry,E?tv?s Loránd University,Budapest,Hungary;2.Chemistry Department,Florida Institute of Technology,Melbourne,USA;3.Institute of Biochemistry and Physiology of Plants and Microorganisms,Russian Academy of Sciences,Saratov,Russia;4.Chemical Research Center,Hungarian Academy of Sciences,Budapest,Hungary |
| Abstract: | The influence of water on the interaction between iron(III) and indole-3-acetic acid (IAA) was studied in different organic solutions using rapid-scan stopped-flow spectrophotometry and rapid-freeze/quench Mössbauer spectroscopy. Measurements were also performed in ethanol–water and acetone–water mixtures. The results showed that the interaction between FeIII and IAA resulted in dimeric FeIII–IAA complex within 1 s, followed by a slow second step to give Fe2+ and IAA(oxidized). No such products were formed in the absence of water. The visible and Mössbauer spectra reflect the nature of the organic solvent and that of the anion of iron(III) salts. |
| Keywords: | Indole-3-acetic acid Iron(III) complexes M?ssbauer spectroscopy Stopped-flow spectrophotometry |
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