Observation of Iron-valence Detrapping in Mixed-valence Trinuclear Heterometal Pentafluorobenzoate Cluster Complex Cr³⁺Fe³⁺Fe²⁺O(C₆F₅COO)₆(C₅H₅N)₃·0.5C₅H₅N·CH₂Cl₂ by ⁵⁷Fe-Mössbauer Spectroscopy

Stark spectroscopy of mixed-valence systems.

Many mixed-valence systems involve two or more states with different electric dipole moments whose magnitudes depend upon the charge transfer distance and the degree of delocalization; these systems can be interconverted by excitation of an intervalence charge transfer transition. Stark spectroscopy involves the interaction between the change in dipole moment of a transition and an electric fie...

Pressure effects and Mössbauer spectroscopic studies on a 3D mixed-valence iron spin-crossover complex with NiAs topology.

A three-dimensional mixed-valence iron complex with NiAs-type topology, [(Fe(III)(3)O)Fe(II)(TA)(6)(H(2)O)(3)].(ClO(4))(2)(NO(3))(EtOH)(H(2)O)(2) (1, HTA = tetrazole-1H-acetic acid), shows spin-crossover behavior that was characterized via variable-temperature crystal structures, Mössbauer spectra and magnetic susceptibilities, the pressure effects on the transition behavior were also studied.

Mixed-Valence Cytochrome Oxidase-Formate Complex

At neutral pH, formate binds to the haem a3 component of cytochrome c oxidase to give a complex that reacts differently from the non-liganded enzyme with reducing agents. Addition of sodium dithionite to the formate complex leads directly to the formation of the fully reduced species, whereas reduction with ascorbate/tetramethylenephenylenediamine can lead to the production of a mixed-valence s...

Title Magnetic properties of mixed-valence iron phosphate glasses

Mixed valence and superconductivity.

Mixed-valence (MV) systems are referred to here as MV-2 and MV-3 depending on whether two or three consecutive valence states are involved. MV-3 systems range from systems with Hubbard U>>0, corresponding to a single stable, intermediate valence state, and U<<0, corresponding to stable alternating valences differing by two units. Experiments using inelastic neutron scattering or inelastic X-ray...