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Luminescent κ-Carrageenan-Based Electrolytes Containing Neodymium Triflate.
Nunes, S C; Saraiva, S M; Pereira, R F P; Silva, M M; Carlos, L D; Almeida, P; Gonçalves, M C; Ferreira, R A S; Bermudez, V de Zea.
Afiliación
  • Nunes SC; Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal. snunes@ubi.pt.
  • Saraiva SM; Chemistry Department, University of Beira Interior, 6201-001 Covilhã, Portugal. snunes@ubi.pt.
  • Pereira RFP; Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal. sofia.m.s.73@gmail.com.
  • Silva MM; Chemistry Department, University of Minho, 4710-057 Braga, Portugal. rpereira@quimica.uminho.pt.
  • Carlos LD; Chemistry Department, University of Minho, 4710-057 Braga, Portugal. nini@quimica.uminho.pt.
  • Almeida P; Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal. lcarlos@ua.pt.
  • Gonçalves MC; Chemistry Department, University of Beira Interior, 6201-001 Covilhã, Portugal. pjsa@ubi.pt.
  • Ferreira RAS; CICS-UBI, University of Beira Interior, 6201-001 Covilhã, Portugal. pjsa@ubi.pt.
  • Bermudez VZ; Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal. cristina@utad.pt.
Molecules ; 24(6)2019 Mar 14.
Article en En | MEDLINE | ID: mdl-30875749
In recent years, the synthesis of polymer electrolyte systems derived from biopolymers for the development of sustainable green electrochemical devices has attracted great attention. Here electrolytes based on the red seaweeds-derived polysaccharide κ-carrageenan (κ-Cg) doped with neodymium triflate (NdTrif3) and glycerol (Gly) were obtained by means of a simple, clean, fast, and low-cost procedure. The aim was to produce near-infrared (NIR)-emitting materials with improved thermal and mechanical properties, and enhanced ionic conductivity. Cg has a particular interest, due to the fact that it is a renewable, cost-effective natural polymer and has the ability of gelling in the presence of certain alkali- and alkaline-earth metal cations, being good candidates as host matrices for accommodating guest cations. The as-synthesised κ-Cg-based membranes are semi-crystalline, reveal essentially a homogeneous texture, and exhibit ionic conductivity values 1⁻2 orders of magnitude higher than those of the κ-Cg matrix. A maximum ionic conductivity was achieved for 50 wt.% Gly/κ-Cg and 20 wt.% NdTrif3/κ-Cg (1.03 × 10-4, 3.03 × 10-4, and 1.69 × 10-4 S cm-1 at 30, 60, and 97 °C, respectively). The NdTrif-based κ-Cg membranes are multi-wavelength emitters from the ultraviolet (UV)/visible to the NIR regions, due to the κ-Cg intrinsic emission and to Nd3+, 4F3/2→4I11/2-9/2.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Biopolímeros / Carragenina / Electrólitos / Glicerol Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Portugal Pais de publicación: Suiza

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Biopolímeros / Carragenina / Electrólitos / Glicerol Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Portugal Pais de publicación: Suiza