Site-selective lanthanide doping in a nonanuclear yttrium(III) cluster revealed by crystal structures and luminescence spectra.

François Baril-Robert (1) , Sarah Petit (2) , Guillaume Pilet (3) , Guillaume Chastanet (3, 4) , Christian Reber (1) , Dominique Luneau (3)

1 Département de chimie [UdeM-Montréal]
2 NEEL - MagSup - Magnétisme et Supraconductivité
3 LMI - Laboratoire des Multimatériaux et Interfaces
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A series of lanthanide-doped nonanuclear yttrium(III) clusters with general formulas (Y(9-x)Ln(x))(acac)(16)(μ(3)-OH)(8)(μ(4)-O)(μ(4)-OH) (Ln = Pr, Eu, Tb, Dy, and Yb) were synthesized. Characterization by single-crystal X-ray diffraction allowed for analysis of relative populations of yttrium (Z = 39) and dopant trivalent lanthanide (Z = 59-70) at every crystallographic metal position. Nonuniform distribution of ions along the three different sites seems to be correlated to the site volume and the ratio of ionic radii. In support, luminescence spectra of europium(III)-doped nonanuclear clusters were measured over a wide range of dopant concentrations. Emission intensities of peaks characteristic of specific sites correlate well with the site population determined through X-ray diffraction.

Domaines: Matériaux

François Baril-Robert, Sarah Petit, Guillaume Pilet, Guillaume Chastanet, Christian Reber, et al.. Site-selective lanthanide doping in a nonanuclear yttrium(III) cluster revealed by crystal structures and luminescence spectra.. Inorganic Chemistry, 2010, 49 (23), pp.10970-10976. ⟨10.1021/ic1011082⟩. ⟨hal-00551870⟩