Journal
RSC ADVANCES
Volume 10, Issue 56, Pages 33718-33730Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra05189f
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- University of Isfahan
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Herein, the geometry, electronic structure, Fe-ligand bonding nature and simulated IR spectrum of alpha-Keggin, lacunary Keggin, iron(ii/iii)-substituted and the important oxidized high-valent iron derivatives of Keggin type polyoxometalates have been studied using the density functional theory (DFT/OPTX-PBE) method and natural bond orbital (NBO) analysis. The effects of different Fe oxidation states (ii-vi) and H2O/OH-/O(2-)ligand interactions have been addressed concerning their geometry and electronic structures. It has been revealed that the d-atomic orbitals of Fe and 2p orbitals of polyoxometalate's oxygen-atoms contribute in ligand binding. Compared with other high valent species, the considered polyoxometalate system of [PW11O39((FeO)-O-V)](4-), possesses a high reactivity for oxygen transfer.
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