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Issue 8, 2010
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Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

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Abstract

Flexible luminescent polymer films were obtained by doping europium(III) complexes in blends of poly(methyl methacrylate) (PMMA) and the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C6mim][Tf2N]. Different europium(III) complexes have been incorporated in the polymer/ionic liquid matrix: [C6mim][Eu(nta)4], [C6mim][Eu(tta)4], [Eu(tta)3(phen)] and [choline]3[Eu(dpa)3], where nta is 2-naphthoyltrifluoroacetonate, tta is 2-thenoyltrifluoroacetonate, phen is 1,10-phenanthroline, dpa is 2,6-pyridinedicarboxylate (dipicolinate) and choline is the 2-hydroxyethyltrimethyl ammonium cation. Bright red photoluminescence was observed for all the films upon irradiation with ultraviolet radiation. The luminescent films have been investigated by high-resolution steady-state luminescence spectroscopy and by time-resolved measurements. The polymer films doped with β-diketonate complexes are characterized by a very intense 5D07F2 transition (up to 15 times more intense than the 5D07F1) transition, whereas a marked feature of the PMMA films doped with [choline]3[Eu(dpa)3] is the long lifetime of the 5D0 excited state (1.8 ms).

Graphical abstract: Ionic liquid as plasticizer for europium(iii)-doped luminescent poly(methyl methacrylate) films

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Supplementary files

Article information


Submitted
29 Sep 2009
Accepted
19 Nov 2009
First published
21 Dec 2009

Phys. Chem. Chem. Phys., 2010,12, 1879-1885
Article type
Paper

Ionic liquid as plasticizer for europium(III)-doped luminescent poly(methyl methacrylate) films

K. Lunstroot, K. Driesen, P. Nockemann, L. Viau, P. H. Mutin, A. Vioux and K. Binnemans, Phys. Chem. Chem. Phys., 2010, 12, 1879
DOI: 10.1039/B920145A

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