Photoluminescent Porous Alginate Hybrid Materials Containing Lanthanide Ions

ArticleinBiomacromolecules 9(7):1945-50 · August 2008with7 Reads
Impact Factor: 5.75 · DOI: 10.1021/bm8002122 · Source: PubMed

    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.