Mössbauer Spectroscopy

A Pyrazolate-Supported Fe3(μ3-O) Core: Structural, Spectroscopic, Electrochemical, and Magnetic Study

“…The temperature dependence of the isomer shift is attributed to the second-order Doppler effect. 17 The value of isomer shift in the whole temperature range is consistent with high spin ferric ions in N/O coordination environment. For temperatures below 20 K, an asymmetric line broadening is observed and is attributed to the onset of relaxation effects.…”

Effect of iron oxidation state on the electrical conductivity of the Earth’s lower mantle

“…2). The hyperfine parameters of the Fe 3þ doublet are consistent with the HS state 20 , and their smooth variation with pressure indicates that Fe 3þ does not undergo any spin transitions within the entire pressure range. Notably, the QS value proposed for LS Fe 3þ from both experimental 6,8 and theoretical 7 studies (red dotted line, Fig.…”

A new di-m-sulfate complex as a model of purple acid phosphatase-sulfate complexes

“…The oxidation states of the iron centers in 1 are supported by the Mössbauer spectrum at 115 K and the following parameters: isomer shift (relative to metallic iron with the source at room temperature) δ, 0.51 mm/s and quadrupole splitting, ∆EQ, 0.87 mm/s which indicates the presence of high-spin Fe2 III centers 13 . The magnetic data for a powder sample of 1 were collected in the temperature range of 5.1 to 300 K and indicate a weak antiferromagnetic coupling interaction for the two Fe 3 ions in the complex.…”