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High spin to low spin change induced by reductive chemistry with iron-substituted Dawson polyoxometalate

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Daniela Cioloboc, Adrian-Raul Tomsa, Grigore Damian, Radu Silaghi-Dumitrescu

Editorial: Elsevier, Inorganic Chemistry Communications, doi: 10.1016/j.inoche.2012.02.019, 2012.


Chemical reduction of an iron(III) substituted Dawson 5-molybdo-12-tungsto-2-phosphate a2-K7[Fe(H2O)P2Mo5W12O61]·17H2O complex, with dithionite in aqueous solution is reported alongside with similar data for the monolacunary Dawson molybdo-tungsto diphosphates a2-[P2Mo5W12O61]10-. UV-vis absorption and lowtemperature EPR (electron paramagnetic resonance) spectra indicate several distinct species and an unprecedented change of spin state at the ferric center, induced indirectly by reduction of the polyoxometalate framework.

Cuvinte cheie: polyoxometalate, spin state, iron, EPR