Highly luminescent anionic Ln(III) beta-diketonate complexes of the formula [P-8,P-8,P-8,P-1][Ln(dbm)(4)], with Ln = Eu3+ and Sm3+, [P-8,P-8,P-8,P-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 degrees C. The complexes easily dissolved in the ionic liquid trioctylmethylphosphonium bis(trifluoromethylsulfonyl) imide [P-8,P-8,P-8,P-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.

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

Enrichi, F.;Benedetti, A.
2015-01-01

Abstract

Highly luminescent anionic Ln(III) beta-diketonate complexes of the formula [P-8,P-8,P-8,P-1][Ln(dbm)(4)], with Ln = Eu3+ and Sm3+, [P-8,P-8,P-8,P-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 degrees C. The complexes easily dissolved in the ionic liquid trioctylmethylphosphonium bis(trifluoromethylsulfonyl) imide [P-8,P-8,P-8,P-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.
2015
Eu complexes, Sm complexes, luminescence, ionic liquid
File in questo prodotto:
File Dimensione Formato  
75_2015_Malba_RSCAdv.pdf

solo utenti autorizzati

Tipologia: Versione dell'editore
Licenza: Accesso ristretto
Dimensione 974.71 kB
Formato Adobe PDF
974.71 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/1064287
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 19
social impact