title: Photoluminescent materials based on silica doped with lanthanide complexes of 4'-formylbenzo-15-crown-5.
abstract: Photoluminescent materials were prepared by introducing lanthanide complexes of 4'-formylbenzo-15-crown-5 (C15H20O6) into a silica matrix obtained by the sol-gel method. The new lanthanide complexes [Ln(C15H20O6)(NO3)3(H2O)2] (Ln3+ = Sm3+, Eu3+ and Tb3+) were synthesized and were fully characterised using spectroscopic techniques, and elemental and thermogravimetric analysis. Photoluminescence measurements were performed for the isolated Eu3+ and Tb3+ complexes as well as for their related silica based materials. A detailed comparative analysis on the photoluminescent properties of the EU3+ complex and of its derived silica material was carried out.
authors.affiliation: Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
authors.forename: Paula C R
authors.initials: PC
authors.lastname: Soares-Santos
authors.forename: Rute A S
authors.initials: RA
authors.lastname: Ferreira
authors.forename: Tito
authors.initials: T
authors.lastname: Trindade
authors.forename: Luís D
authors.initials: LD
authors.lastname: Carlos
authors.forename: Helena I S
authors.initials: HI
authors.lastname: Nogueira