Structure of Eu4TiO(OCH(CH3)2)14 and Eu2La2TiO(OCH(CH3)2)14 and spectroscopic studies of three Eu-Ti alkoxides: Eu4TiO(OCH(CH3)2)14, Eu2La2TiO(OCH(CH3)2)14 and Eu2Ti4O2(OC2H5)18(HOC2H5)2
(English)Manuscript (preprint) (Other academic)
Three Eu-Ti alkoxides have been synthesised and spectroscopically and structurally characterised: Eu4TiO(OCH(CH3)2)14 (1), Eu2La2TiO(OCH(CH3)2)14 (2) and Eu2Ti4O2(OC2H5)18(HOC2H5)2 (3). The structures of 1 and 2 were refined from single-crystal X-ray diffraction data. The iso-structural 1 and 2 are of the Sm4TiO(OR)14 structure type, where the La3+ and Eu3+ ions in 2 are randomly distributed over the two six-coordinated Ln positions. Electronic absorption spectroscopy shows that Eu3+ occupies both sites in solutions of 1 and 2, but differences in the fine structures of the Eu3+ f-f transition peaks due to the substitution of La3+ for Eu3+ are reported. The structure of Eu2Ti4O2(OC2H5)18(HOC2H5)2 was inferred from vibrational and electronic spectroscopic studies and comparison with the structurally determined iso-structural Er2Ti4O2(OC2H5)18(HOC2H5)2.
Alkoxides, crystal structure, f-f spectroscopy
Research subject Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-121575OAI: oai:DiVA.org:uu-121575DiVA: diva2:305782