Easily Accessible Rare-Earth-Containing Phosphonium Room-Temperature Ionic Liquids: EXAFS, Luminescence and Magnetic Properties

Jorge Alvarez Vicente, Sahra Dandil, Dipanjan Banerjee, H. Q. Nimal Gunaratne, Suzanne Gray, Solveig Felton, Geetha Srinivasan, Anna M. Kaczmarek, Rik Van Deun, Peter Nockemann

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A range of liquid rare-earth chlorometallate complexes with alkyl-phosphonium cations, [P666 14]+, has been synthesised and characterised. EXAFS confirmed the predominant liquid-state speciation of the [LnCl6]3- of the series with Ln = Nd, Eu, Dy. The crystal structure of the shorter-alkyl-chain cation analogue [P4444]+ has been determined and exhibits a very large unit cell. The luminescence properties, with visible light emissions of the liquid Tb, Eu, Pr and Sm and the NIR emissions for the Nd and Er compounds were determined. The effective magnetic moments were measured and fitted for the Nd, Tb, Ho, Dy, Gd and Er samples.
Original languageEnglish
Pages (from-to)5301–5311
Number of pages11
JournalJournal of Physical Chemistry B
Issue number23
Early online date20 May 2016
Publication statusPublished - 2016


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