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Title: Luminescent Properties of Lanthanoid-Poly(Sodium Acrylate) Composites: Insights on the Interaction Mechanism
Authors: Matsushita, Alan F Y
Tapia, María José 
Pais, Alberto António Caria Canelas 
Valente, Artur José Monteiro 
Keywords: Fluorescence quenching; Lanthanoid complex; Metal-organic gel; Polymer composite; Responsive gel
Issue Date: 9-Jun-2020
Publisher: MDPI
Project: UID/QUI/UI0313/2020 
Serial title, monograph or event: Polymers
Volume: 12
Issue: 6
Abstract: The interaction between polyelectrolytes and metal ions is governed by different types of interactions, leading to the formation of different phases, from liquid state to weak gels, through an appropriate choice of metal ion/polyelectrolyte molar ratio. We have found that lanthanide ions, europium(III) and terbium(III), are able to form polymer composites with poly(sodium acrylate). That interaction enhances the luminescent properties of europium(III) and terbium(III), showing that Eu3+/poly(sodium acrylate) (PSA) and Tb3+/PSA composites have a highly intense red and green emission, respectively. The effect of cations with different valences on the luminescent properties of the polymer composites is analyzed. The presence of metal ions tends to quench the composite emission intensity and the quenching process depends on the cation, with copper(II) being by far the most efficient quencher. The interaction mechanism between lanthanoid ions and PSA is also discussed. The composites and their interactions with a wide range of cations and anions are fully characterized through stationary and non-stationary fluorescence, high resolution scanning electronic microscopy and X-ray diffraction.
ISSN: 2073-4360
DOI: 10.3390/polym12061314
Rights: openAccess
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais

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