Vibrational and Electronic Spectra of Hexanitrocobalt(III) Salts

Krause, Ronald A.; Wickenden, Adrienne E.; Ruggles, Carl R.

doi:10.1021/ic50039a049

Cited by 9 publications

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“…We therefore searched for other centrosymmetric systems where a comparison could be made with the spectra of EuF 6 3− and EuCl 6 3− . The versatile nitrite ligand is a suitable candidate because it forms chelating bidentate coordination with lanthanide (Ln 3+ ) ions, unlike the mainly monodentate nitrito and N -ligated nitro complexes with transition metals. − The Ln 3+ ion occupies a T h site in the Cs 2 NaLn(NO 2 ) 6 systems and is surrounded by six NO 2 − ions, as shown in Figure . Some previous investigations , have shown that the electronic spectra are very complex because they are almost entirely vibronic in nature, so that comprehensive investigations have not yet been performed.…”

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Understanding Eu³⁺ Emission by Using ¹⁵N Vibronic Shifts

Tanner

2010

Inorg. Chem.

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Hexanitritolanthanates provide a unique opportunity to investigate the energy-level structures and crystal field of the lanthanide ion (Ln(3+)) in T(h) site symmetry, with 12-coordination to oxygen. However, the electronic spectra are mainly vibronic and particularly extensive and complex. Advantage may be taken of the high energy of NO(2)(-) vibrations, using (15)N substitution, in assigning the electronic emission spectra. These features form a fingerprint in less-congested spectral regions. The technique is demonstrated for the case of Ln = Eu, from the study of the (5)D(0) emission spectra.

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