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Issue 28, 2014
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Heteronuclear lanthanide-based coordination polymers exhibiting tunable multiple emission spectra

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Abstract

Reactions in water at room temperature between lanthanide ions and 5-hydroxy-1,3-benzene-di-carboxylic acid hereafter referred to as H2(hip) lead to a new family of lanthanide-based hetero-nuclear compounds with the general chemical formula [Ln2−2xLn2x′(hip)2(H2O)10,(hip),4H2O] where Ln and Ln′ = Pr–Lu or Y and where 0 ≤ x ≤ 1. The physico-chemical properties of this family have been characterized by PXRD, TDXD, TG/TD, EDS, SEM, 89Y solid state NMR spectroscopy and optical spectroscopy. The luminescent properties of these compounds are studied in detail. This study reveals that the competition between intermetallic energy transfer and photo-induced electron transfer gives rise to complex multiple emission spectra. It is therefore possible, for some Ln/Ln′ compositions, to obtain green, yellow or red emission by tuning the excitation wavelength over a 50 nm range. From a global point of view, this study shows that this series of compounds could be of great interest as far as luminescent coordination polymers usable as taggants for the fight against counterfeiting are aimed.

Graphical abstract: Heteronuclear lanthanide-based coordination polymers exhibiting tunable multiple emission spectra

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Publication details

The article was received on 13 Mar 2014, accepted on 25 Apr 2014 and first published on 25 Apr 2014


Article type: Paper
DOI: 10.1039/C4TC00506F
Citation: J. Mater. Chem. C, 2014,2, 5510-5525

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    Heteronuclear lanthanide-based coordination polymers exhibiting tunable multiple emission spectra

    X. Fan, S. Freslon, C. Daiguebonne, G. Calvez, L. Le Pollès, K. Bernot and O. Guillou, J. Mater. Chem. C, 2014, 2, 5510
    DOI: 10.1039/C4TC00506F

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