Field-induced slow relaxation in a dinuclear dysprosium(III) complex based on 3-methoxycinnamic acid

Ouafa Khalfaoui (1) , Adel Beghidja (1) , Jérome Long (2) , Chahrazed Beghidja (1) , Yannick Guari (2) , Joulia Larionova (2)

1 CHEMS - Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale
2 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

Rare-earth doped silica-based glasses lead the optical materials due to their tailorable spectroscopic and optical properties. In this context, we took advantage of the sol-gel process to prepare various Eu-doped silica glasses to study their luminescent properties before and after annealing at 900 • C. The effect of magnesium on these properties was studied in comparison with Mg-free-glass. Using TEM, nitrogen sorption, XRD and FT-IR, we confirmed that the magnesium modifies the glass structure and the thermal treatment eliminates the aqueous environment, modifying the structure ordering. The emission spectra and the decay time curves show the advantages of the Mg addition and the annealing on the photoluminescent properties.

Mots clés: silica; sol-gel; luminescent materials; magnesium; photoluminescence; europium; lanthanide ions; single-molecule magnet; magnetic relaxation; single-crystal structure

Domaines: Chimie de coordination

Ouafa Khalfaoui, Adel Beghidja, Jérome Long, Chahrazed Beghidja, Yannick Guari, et al.. Field-induced slow relaxation in a dinuclear dysprosium(III) complex based on 3-methoxycinnamic acid. Inorganics, 2018, 6, pp.35. ⟨10.3390/inorganics6010035⟩. ⟨hal-01738652⟩