Electronic spectra of anions intercalated in layered double hydroxides

Abstract

Transition metal complexes intercalated in layered double hydroxides have a different electronic structure as compared to their free state owing to their confinement within the interlayer gallery. UV-Vis absorptions of the intercalated complex anions show a significant shift as compared to their free state. The ligand to metal charge transfer transitions of the ferricyanide anion show a red shift on intercalation. The ferrocyanide ion shows a significant blue shift of d-d bands due to the increased separation between t2g and eg levels on intercalation. MnO-4 ion shows a blue shift in its ligand to metal charge transfer transition since the non-bonding t1 level of oxygen from which the transition arises is stabilized. © Indian Academy of Sciences.