Luminescent Transparent Composite Films Based on Lanthanopolyoxometalates and Filmogenic Polysaccharides
authors Pinto, RJB; Granadeiro, CM; Freire, CSR; Silvestre, AJD; Neto, CP; Ferreira, RAS; Carlos, LD; Cavaleiro, AMV; Trindade, T; Nogueira, HIS
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Polyoxometalates; Lanthanides; Luminescence; Thin films; Carbohydrates
keywords 3-HYDROXYPICOLINIC ACID; HYBRID MATERIALS; POLYOXOMETALATE; CHITOSAN; COMPLEXES; CHEMISTRY; POLYOXOTUNGSTOEUROPATE; ELECTROCHROMISM; FABRICATION; ANION
abstract A series of polysaccharide-based transparent composite films containing lanthanopolyoxometalates (LnPOMs) have been prepared by using a water-soluble cationic chitosan derivative [HTCC = N-(2-hydroxypropyl)-3-trimethylammonium chitosan chloride] and pullulan (PUL). HTCC was more suitable than pure chitosan for this purpose due to its positive charge and solubility in water over a broad range of pH values. The LnPOMs [Ln(W5O18)2]9 (Ln = Eu and Tb) were incorporated into the polysaccharides. EuPOMs encapsulated in amorphous silica shells were also incorporated into the polysaccharides to test the effect on film processing of the loading of nanoparticles instead of LnPOM anions. The incorporation of LnPOMs or LnPOM/silica core/shell nanoparticles into either HTCC or PUL polysaccharides originated clear transparent films. These composite films are transparent in daylight and exhibit visible emission under UV excitation. Photoluminescence studies (emission and excitation spectra and emission decay curves) were performed on the newly prepared films.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2013
issue 10-11
beginning page 1890
ending page 1896
digital object identifier (doi) 10.1002/ejic.201201174
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000316912500046
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journal impact factor (jcr 2016): 2.444
5 year journal impact factor (jcr 2016): 2.412
category normalized journal impact factor percentile (jcr 2016): 72.826
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