Luminescent Carrageenan Hydrogels Containing Lanthanopolyoxometalates
authors Fateixa, S; Carvalho, RS; Daniel-da-Silva, AL; Nogueira, HIS; Trindade, T
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Polyoxometalates; Carrageenans; Hydrogels; Lanthanides; Photochemistry; Luminescence
keywords IN-SITU SYNTHESIS; ANTITUMORAL ACTIVITY; HYBRID MATERIALS; QUANTUM DOTS; LANTHANIDE; COMPLEXES; GELS; NANOPARTICLES; WATER; PHOTOLUMINESCENT
abstract In this research, we investigated the use of lanthanopolyoxometalates {LnPOM, K-9[Ln(W5O18)(2)], Ln = Eu, Tb} as luminophores in thermosensitive polysaccharides such as carrageenan hydrogels. We demonstrate that the LnPOM species still show the characteristic photoluminescence bands of the Ln(III) ion when incorporated in the gel matrix. Moreover, the strength of the carrageenan hydrogels increases by increasing the amount of LnPOM added because of the effect of K+ ions as cross-linkers, but without compromising the photoluminescent behaviour. Nanoscale homogeneity is crucial regarding applications of hydrogels responsive to external stimuli. This research shows that the final LnPOM-loaded hydrogels are homogeneous as a consequence of the diffusion behaviour of the luminophore species within the gel network. Therefore, we anticipate that the association of carrageenan hydrogels to luminescent lanthanopolyoxometalates might be of great relevance for optical devices and in particular for bioimaging techniques.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2017
issue 43
beginning page 4976
ending page 4981
digital object identifier (doi) 10.1002/ejic.201700888
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000416236700003
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journal analysis (jcr 2017):
journal impact factor 2.507
5 year journal impact factor 2.381
category normalized journal impact factor percentile 70.000
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