Ruthenium and rhodium complexes anchored to europium oxide nanoparticles

We report the synthesis of ruthenium and rhodium polypyridyl complexes with ester substituents and the attachment of these complexes onto europium oxide nanoparticles through the surface-anchoring deeb ligand (deeb = diethyl-2,2′-bipyridine-4,4′-dicarboxylate). Characterization by 1H NMR, electronic absorption and IR spectroscopies, and mass spectrometry showed structural and photochemical properties consistent with deeb complexes. Solid luminescence spectra of Eu2O3 nanoparticles modified with [Rh(deeb)2Cl2](PF6) at 77 K show the characteristic emission of Eu2O3 which will be used in the future to study interfacial energy dynamics.