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Issue 75, 2015
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Phosphonium-based tetrakis dibenzoylmethane Eu(iii) and Sm(iii) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid

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Abstract

Highly luminescent anionic Ln(III) β-diketonate complexes of the formula [P8,8,8,1][Ln(dbm)4], with Ln = Eu3+ and Sm3+, [P8,8,8,1] = trioctylmethylphosphonium and dbm = 1,3-diphenylpropane-1,3-dione were synthesized. The single crystal X-ray structure of the samarium and europium complexes showed that the metal ion was surrounded by four ligands and that no water or solvent molecules were coordinated. The solid complexes showed good thermal stability up to 250 °C. The complexes easily dissolved in the ionic liquid trioctylmethylphosphonium bis(trifluoromethylsulfonyl)imide [P8,8,8,1][Tf2N], due to the presence of a common phosphonium countercation in the ionic liquid and in the Eu(III) and Sm(III) complexes. The photoluminescence of the complexes was studied in the solid state and in an ionic liquid as well as in acetonitrile (MeCN) as a solvent.

Graphical abstract: Phosphonium-based tetrakis dibenzoylmethane Eu(iii) and Sm(iii) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid

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Article information


Submitted
05 Mar 2015
Accepted
02 Jul 2015
First published
02 Jul 2015

RSC Adv., 2015,5, 60898-60907
Article type
Paper
Author version available

Phosphonium-based tetrakis dibenzoylmethane Eu(III) and Sm(III) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid

C. M. Malba, F. Enrichi, M. Facchin, N. Demitri, J. R. Plaisier, M. M. Natile, M. Selva, P. Riello, A. Perosa and A. Benedetti, RSC Adv., 2015, 5, 60898
DOI: 10.1039/C5RA03947A

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