IntervallenceLadungstransferBand
Intervallence charge transfer, often abbreviated as IVCT, is a phenomenon observed in mixed-valence compounds. These are chemical species that contain at least two metal ions or atoms of the same element in different oxidation states. IVCT refers to the electronic transition that occurs when an electron moves between these ions or atoms with different valencies. This movement is not a simple transfer of charge but rather a delocalized process.
The energy required for this transition is typically in the visible or near-infrared region of the electromagnetic
Studies of IVCT are important for understanding electron transfer processes in various chemical and biological systems.