Luminescent κ-Carrageenan-Based Electrolytes Containing Neodymium Triflate
| Autor: | Rui F. P. Pereira, L. D. Carlos, R. Ferreira, Sofia Saraiva, V. de Zea Bermudez, Maria Manuela Silva, Paulo Almeida, M. C. Gonçalves, Sandra C.C. Nunes |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Glycerol
Materials science Luminescence Ultraviolet Rays Inorganic chemistry Pharmaceutical Science chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry Carrageenan luminescence features 01 natural sciences Neodymium Article Analytical Chemistry Metal lcsh:QD241-441 Electrolytes kappa-carrageenan Biopolymers lcsh:Organic chemistry Drug Discovery Ionic conductivity structure Physical and Theoretical Chemistry chemistry.chemical_classification Science & Technology Organic Chemistry thermal properties Electric Conductivity Polymer 021001 nanoscience & nanotechnology 3. Good health 0104 chemical sciences Membrane chemistry Chemistry (miscellaneous) visual_art visual_art.visual_art_medium ionic conductivity Molecular Medicine κ-carrageenan 0210 nano-technology Trifluoromethanesulfonate Gels biopolymer electrolyte |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Molecules Volume 24 Issue 6 Molecules, Vol 24, Iss 6, p 1020 (2019) |
| Popis: | 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 &kappa carrageenan (&kappa 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 &kappa Cg-based membranes are semi-crystalline, reveal essentially a homogeneous texture, and exhibit ionic conductivity values 1&ndash 2 orders of magnitude higher than those of the &kappa Cg matrix. A maximum ionic conductivity was achieved for 50 wt.% Gly/&kappa Cg and 20 wt.% NdTrif3/&kappa Cg (1.03 × 10&minus 4, 3.03 × 4, and 1.69 × 4 S cm&minus 1 at 30, 60, and 97 ° C, respectively). The NdTrif-based &kappa Cg membranes are multi-wavelength emitters from the ultraviolet (UV)/visible to the NIR regions, due to the &kappa Cg intrinsic emission and to Nd3+, 4F3/2&rarr 4I11/2-9/2. |
| Databáze: | OpenAIRE |
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