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Absorption Spectroscopy as a Probe of the Structure of Polyaminocarboxylate-Eu(III) Complexes in Solution

100%

Mondry A., Riehl J.

Acta Physica Polonica A

1993

vol. 84

issue 5

969-974

Absorption spectroscopy was used to study the aqueous solution structure of Eu(III) complexes with DTPA (diethylenetriaminepentaacetic acid) and TTHA (triethylenetetraaminehexaacetic acid). Analysis of the oscillator strengths of the 4f ↔ 4f transitions and of the Judd-Ofelt intensity parameters, τ_{λ}, was performed in order to investigate the formation and the type of bonding in Eu(III)-DTPA and Eu(III)-TTHA species occurring in solution. The correlation of these results with those from other methods made it possible to suggest a relatively complete model of Eu(III)-polyaminocarboxylate coordination.

Spectroscopy Studies of Erbium and Dysprosium Acetate Single Crystals

100%

Mondry A., Bukietyńska K.

Acta Physica Polonica A

1996

vol. 90

issue 1

233-238

Electronic absorption spectra of erbium and dysprosium acetate single crystals were measured. The intensities of 4f-4f transitions were calculated and the Judd-Ofelt Ω_{λ} parameters evaluated. Heavy lanthanide acetates differ from other lanthanide carboxylate compounds by relatively high "hypersensitive" transition intensities and the Ω_{2} parameters. These results are discussed in terms of a stronger polarization effect which can be explained by the distinctly shorter Ln-OH_{2} bond in comparison with the Ln-OOC bond in the investigated system.

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2 Acta Physica Polonica A

1 1996

1 1993

2 Mondry A.

1 Bukietyńska K.

1 Riehl J.

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Absorption Spectroscopy as a Probe of the Structure of Polyaminocarboxylate-Eu(III) Complexes in Solution

Spectroscopy Studies of Erbium and Dysprosium Acetate Single Crystals