Preparation and Luminescence Properties of Hybrid Titania Immobilized with Lanthanide Complexes
journal contributionposted on 12.03.2009, 00:00 by Huanrong Li, Peng Liu, Yige Wang, Li Zhang, Jiangbo Yu, Hongjie Zhang, Binyuan Liu, Ulrich Schubert
Lanthanide(III) β-diketonate complexes (Ln = Eu, Nd, Er) were immobilized on an iso-nicotinic acid (nit)-functionalized titania material. Iso-nicotinic acid was tethered to the titania material via reacting with titanium alkoxide; tris(2-thenoyltrifluoroacetonato) lanthanide(III) dihydrate complexes were coupled to the titania via adduct formation with the nitrogen atoms from bonded iso-nicotinic acid; and the coordinated water molecules were expelled from the first coordination sphere of the lanthanide(III) ion as revealed by the prolonged lifetime of the hybrid titania material compared with that of the pure tris(2-thenoyltrifluoroacetonato) europium(III). Depending on the lanthanide ion, the luminescent titania materials emit in the visible region (Ln = Eu) or in the near-infrared region (Ln = Nd, Er).