Photoluminescent porous alginate hybrid materials containing lanthanide ions.
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.
Liu
Fengyi
F
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.
Carlos
Luis D
LD
Ferreira
Rute A S
RA
Rocha
João
J
Gaudino
Maria Concetta
MC
Robitzer
Mike
M
Quignard
Françoise
F
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
D000464:Alginates; D005782:Gels; D006603:Hexuronic Acids; D020100:Hydrogels; D028581:Lanthanoid Series Elements; D049408:Luminescent Agents; D013725:Terbium; D005063:Europium; D020723:Glucuronic Acid