ИСТИНА

Iron commonly exists in zero, +2, and +3 oxidation states; however, in certain environments, higher oxidation states of iron such as +4 to +6 can also be obtained, which have great interest in biotechnology, nanotechnology, and environmental remediation technology. The Mössbauer characterization of high-valent (+4, +5, and +6) iron compounds based on the correlation between the isomer shift and the valence state of iron in solid phase and frozen solution will be presented. The use of Mössbauer spectroscopy in conjunction with the rapid-freeze/quench technique to determine different intermediate oxidation states and phase(s) of iron in the oxidation of substrates by FeVIO42- will be given. The possible existence of iron compound with valences +7 and +8 will be briefly discussed.