Dynamics of Fe atoms in Fe-gluconate as seen by Mössbauer spectroscopy

Abstract

Fe-gluconate was studied by means of the Mössbauer spectroscopy in the temperature interval of 80-305K. The measured spectra were analyzed in terms of two subspectra and, alternatively, two distributions of the quadrupole splitting. The major component (85%) was identified as due to high-spin Fe 2+ ions while the identification of the minor component (15%) was not unique: some characteristics are in favour of the high-spin Fe 3+ state while other ones are consistent with the low-spin Fe 2+ state.Values of the Debye temperature were determined for both phases from a temperature dependence of the center shift as well as from that of the spectral area. The force constant for the high-spin ferrous atoms was evaluated to be equal to 44 N/m (243 cm -1 ).

Analyses of Ferrous and Ferric State in DynabiTabUsing Mössbauer Spectroscopy

“…Both IS and QS for the ferric ion are overlapped with ferrous-LS. However, the identification of the spin state and valence state of the minor phase in ferrous gluconate is unclear, yet [ 10 , 11 ]. The surface integral of the fitted spectrum is applied to the composition of the sample.…”

“…We may suppose that the doublet with δ and Δ E Q values of 0.12 and 0.9 mm/s is attributed to a ferric phase in ferrous gluconate, according to a certificate analysis. This results in ferrous gluconate oxidation and the formation of ferric gluconate [ 10 , 11 ]. The doublet with δ and Δ E Q values of 1.09 and 3.06 mm/s is attributed to ferrous gluconate.…”

Analyses of iron electron status in Chela-Ferr biocomplex using Mössbauer Spectroscopy

“…Parametry dopasowania do widma zestawiono w tabeli 1. Ich wartości zależą nie tylko od stanu walencyjnego, ale także od stanów spinowych niskiego spinu (LS) i wysokiego spinu (HS) [8,9]. W glukonianach żelazowych faza podrzędna jest dostarczana przez żelazo-LS lub żelazo-HS.…”

Revealing magnetic component in crystalline Fe-gluconate

“…The Mössbauer spectroscopy has been recognized as a relevant technique to investigate the issue. However, our recent study performed on a crystalline form of the Fegluconate in the temperature range of 80-310K did not show any measurable difference in the lattice-dynamical behavior of the two types of Fe-ions [12]. In order to shed more light on the issue we have performed similar measurements on the same sample of this compound but in a lower temperature range viz.…”