Spin-Forbidden Transitions in the Spectra of Transition Metal Ions and Nephelauxetic Effect

In this paper we review the spectroscopic properties of three transition metal ions - Mn4+, Cr3+ and Ni2+ - in crystals and establish a relationship between the energies of the lowest in energy spin-forbidden transitions and covalence of the "metal -ligand" chemical bonds. A new parameter...

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Published inECS journal of solid state science and technology Vol. 5; no. 1; pp. R3067 - R3077
Main Authors Brik, M. G., Camardello, S. J., Srivastava, A. M., Avram, N. M., Suchocki, A.
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 01.01.2016
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Summary:In this paper we review the spectroscopic properties of three transition metal ions - Mn4+, Cr3+ and Ni2+ - in crystals and establish a relationship between the energies of the lowest in energy spin-forbidden transitions and covalence of the "metal -ligand" chemical bonds. A new parameter β1=(BB0)2+(CC0)2 (where (B, C (B0, C0) are the Racah parameters of the ions in a crystal (free state), respectively) is shown to determine the energy of the above-mentioned transitions. The considered ions can be used as reliable probes of the covalent effects in various hosts. Several practical recommendations on how to tune the spin-forbidden transitions energy to meet specific needs are suggested.
Bibliography:0091601JSS
ISSN:2162-8769
2162-8777
DOI:10.1149/2.0091601jss