title: Photoluminescent porous alginate hybrid materials containing lanthanide ions.
abstract: The photoluminescence features of Eu(3+)-, Tb(3+)-, Tb(3+)/Eu(3+)-alginate aerogel (hydrogel and alcogel) and Eu(3+)-alginate xerogel hybrids were investigated. The Eu(3+)-alginate aerogel and alcogel exhibit the highest (5)D0 quantum efficiencies (9.9 and 8.2%, respectively), while the hydrogel and xerogel have lower values (5.2 and 5.6%, respectively). The Tb(3+)/Eu(3+) hybrids are multiwavelength emitters in which the emission color can be tuned across the chromaticity diagram from the red toward the yellowish-green spectral regions, crossing the white area by selecting the excitation wavelength.
authors.affiliation: Department of Physics, CICECO, University of Aveiro, Portugal, Institut Charles Gerhardt-Montpellier, Materiaux Avances Pour la Catalyse et la Sante, UMR5253 CNRS-ENSCM-UM2-UM1, 8 rue de l'Ecole Normale, 34296 Montpellier, France.
authors.forename: Fengyi
authors.initials: F
authors.lastname: Liu
authors.forename: Luis D
authors.initials: LD
authors.lastname: Carlos
authors.forename: Rute A S
authors.initials: RA
authors.lastname: Ferreira
authors.forename: João
authors.initials: J
authors.lastname: Rocha
authors.forename: Maria Concetta
authors.initials: MC
authors.lastname: Gaudino
authors.forename: Mike
authors.initials: M
authors.lastname: Robitzer
authors.forename: Françoise
authors.initials: F
authors.lastname: Quignard
mesh_terms: D000464:Alginates; D003116:Color; D005063:Europium; D005782:Gels; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D020100:Hydrogels / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008027:Light; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D013725:Terbium
chemical_list: D000464:Alginates; D005782:Gels; D006603:Hexuronic Acids; D020100:Hydrogels; D028581:Lanthanoid Series Elements; D049408:Luminescent Agents; D013725:Terbium; D005063:Europium; D020723:Glucuronic Acid