Issue 39, 2011

Surprising luminescent properties of the polyphosphates Ln(PO3)3 : Eu (Ln = Y, Gd, Lu)

Abstract

The optical emission properties of the lanthanoid catena-polyphosphates Ln(PO3)3 (Ln = Y, Gd, Lu) doped with europium were investigated. Incommensurately modulated β-Y(PO3)3 : Eu (super space groupCc (0|0.364|0)0) and Gd(PO3)3 : Eu (space groupI2/a) show the usual emission characteristics of Eu3+, while in Lu(PO3)3 : Eu (space groupCc) the europium is unprecedentedly partially reduced to the divalent state, as proven by both a broad emission band at 406 nm excited at 279 nm and an EPR spectroscopic investigation. 151Eu-Mössbauer spectroscopy showed that only a very small part of the europium is reduced in Lu(PO3)3 : Eu. An explanation for this unusual behaviour is given.

Graphical abstract: Surprising luminescent properties of the polyphosphates Ln(PO3)3 : Eu (Ln = Y, Gd, Lu)

Supplementary files

Article information

Article type
Paper
Submitted
11 Jan 2011
Accepted
26 Apr 2011
First published
08 Jun 2011

Dalton Trans., 2011,40, 9971-9976

Surprising luminescent properties of the polyphosphates Ln(PO3)3 : Eu (Ln = Y, Gd, Lu)

H. A. Höppe, K. Kazmierczak, S. Kacprzak, I. Schellenberg and R. Pöttgen, Dalton Trans., 2011, 40, 9971 DOI: 10.1039/C1DT10043B

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