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 t 2g and e g levels on intercalation. MnO\(_{4}^{{-}}\) ion shows a blue shift in its ligand to metal charge transfer transition since the non-bonding t 1 level of oxygen from which the transition arises is stabilized.
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Acknowledgements
The authors thank Prof E Arunan for useful discussions and the Department of Science and Technology (DST), Government of India (GOI), for financial support. (S R) is grateful to the Council for Scientific and Industrial Research, GOI, for the award of a senior research fellowship. (PVK) is a recipient of the Ramanna fellowship of DST.
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RADHA, S., VISHNU KAMATH, P. Electronic spectra of anions intercalated in layered double hydroxides. Bull Mater Sci 36, 923–929 (2013). https://doi.org/10.1007/s12034-013-0538-0
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DOI: https://doi.org/10.1007/s12034-013-0538-0