Luminescent multifunctional hybrids obtained by grafting of ruthenium complexes on mesoporous silica

Rafael Miguel Sábio (1, 2) , Marie Gressier (1) , José Maurício A. Caiut (2) , Marie-Joëlle Menu (1) , Sidney J.L. Ribeiro (2)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 USP - Universidade de São Paulo = University of São Paulo

This work evaluates the luminescent properties of new hybrids obtained by covalent grafting of ruthenium complexes on mesoporous silica particles. Spray pyrolysis afforded the mesoporous silica particles in one step; two different types of structure-directing agents were employed. Scanning and transmission electron microscopy (SEM and TEM, respectively) analyses confirmed that the particles had spherical morphology and ordered hexagonal mesoporosity (2 and 5nm), which justified the high surface area up to 1420m2g-1 measured by Brunauer-Emmett-Teller (BET) surface area analysis. Covalent grafting of silylated ruthenium(II) complexes [Ru(bpy)21]Cl2 and [Ru(bpy)22]Cl2 on the mesoporous particles gave monolayered hybrids, characterized by fourier transform infrared spectroscopy (FTIR), TEM, and photoluminescence. Results highlighted the formation of new luminescent platforms containing an estimated 0.11mmol of ruthenium(II) complex per gram of silica, which corresponded to 0.09 ruthenium(II) complex nm−2 of silica.

Mots clés: Hybrid; Porous materials; Spray pyrolysis; Silylated complexes; Luminescence

Domaines: Matériaux

Rafael Miguel Sábio, Marie Gressier, José Maurício A. Caiut, Marie-Joëlle Menu, Sidney J.L. Ribeiro. Luminescent multifunctional hybrids obtained by grafting of ruthenium complexes on mesoporous silica. Materials Letters, 2016, 174, pp.1-5. ⟨10.1016/j.matlet.2016.03.058⟩. ⟨hal-02319919⟩