Luminescent Ln-based silsesquioxanes with a β-diketonate antenna ligand: toward the design of efficient temperature sensors.

We report the synthesis and single-crystal X-ray diffraction, magnetic, and luminescence measurements of a novel family of luminescent cage-like tetranuclear silsesquioxanes (PhSiO)(LnO)(O)(CHO)(EtOH)(CHCN)⋅2CHCN (where Ln = Tb, ; Tb/Eu, ; and Gd, ), featuring seven-coordinated lanthanide ions arranged in a one-capped trigonal prism geometry. Compounds and exhibit characteristic Tb and Tb/Eu-related emissions, respectively, sensitized by the chelating antenna acetylacetonate (acac) ligands upon excitation in the UV and visible spectral regions. Compound is used to assess the energies of the triplet states of the ligand.

Hybrid multifunctionalized mesostructured stellate silica nanoparticles loaded with β-diketonate Tb/Eu complexes as efficient ratiometric emissive thermometers working in water.

Despite the great effort made in recent years on lanthanide-based ratiometric luminescent nanothermometers able to provide temperature measurements in water, their design remains challenging. We report on the synthesis and properties of efficient ratiometric nanothermometers that are based on mesoporous stellate nanoparticles (MSN) of . 90 nm functionalized with an acetylacetonate (acac) derivative inside the pores and loaded with β-diketonate-Tb/Eu complexes able to work in water, in PBS or in cells.

Multifunctionalized Mesostructured Silica Nanoparticles Containing Mn2 Complex for Improved Catalase-Mimicking Activity in Water.

We report the synthesis of a hybrid nanocatalyst obtained through the immobilization of bio-inspired [{Mn(bpy)(HO)}(µ-2-MeCHCOO)(µ-O){Mn(bpy)(NO)}]NO compound into functionalized, monodispersed, mesoporous silica nanoparticles. The in situ dual functionalization sol-gel strategy adopted here leads to the synthesis of raspberry-shaped silica nanoparticles of ca. 72 nm with a large open porosity with preferential localization of 1,4-pyridine within the pores and sulfobetaine zwitterion on the nanoparticles' periphery.