{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T07:12:59Z","timestamp":1763017979524,"version":"build-2065373602"},"reference-count":53,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2019,3,14]],"date-time":"2019-03-14T00:00:00Z","timestamp":1552521600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Foundation for Science and Technology (FCT) and by FEDER funds through the POCI-COMPETE 2020","award":["project UniRCell (SAICTPAC\/0032\/2015, POCI-01-0145-FEDER-016422","FCOMP-01-0124-FEDER-037271","Pest-OE\/QUI\/UI0616\/2014","UID\/CTM\/50025\/2013","project LUMECD (POCI-01-0145-FEDER-016884 and PTDC\/CTM-NAN\/0956\/2014"],"award-info":[{"award-number":["project UniRCell (SAICTPAC\/0032\/2015, POCI-01-0145-FEDER-016422","FCOMP-01-0124-FEDER-037271","Pest-OE\/QUI\/UI0616\/2014","UID\/CTM\/50025\/2013","project LUMECD (POCI-01-0145-FEDER-016884 and PTDC\/CTM-NAN\/0956\/2014"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>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 \u03ba-carrageenan (\u03ba-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 \u03ba-Cg-based membranes are semi-crystalline, reveal essentially a homogeneous texture, and exhibit ionic conductivity values 1\u20132 orders of magnitude higher than those of the \u03ba-Cg matrix. A maximum ionic conductivity was achieved for 50 wt.% Gly\/\u03ba-Cg and 20 wt.% NdTrif3\/\u03ba-Cg (1.03 \u00d7 10\u22124, 3.03 \u00d7 10\u22124, and 1.69 \u00d7 10\u22124 S cm\u22121 at 30, 60, and 97 \u00b0C, respectively). The NdTrif-based \u03ba-Cg membranes are multi-wavelength emitters from the ultraviolet (UV)\/visible to the NIR regions, due to the \u03ba-Cg intrinsic emission and to Nd3+, 4F3\/2\u21924I11\/2-9\/2.<\/jats:p>","DOI":"10.3390\/molecules24061020","type":"journal-article","created":{"date-parts":[[2019,3,15]],"date-time":"2019-03-15T04:12:09Z","timestamp":1552623129000},"page":"1020","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Luminescent \u03ba-Carrageenan-Based Electrolytes Containing Neodymium Triflate"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8993-3162","authenticated-orcid":false,"given":"S. C.","family":"Nunes","sequence":"first","affiliation":[{"name":"Chemistry Department, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"},{"name":"Chemistry Department, University of Beira Interior, 6201-001 Covilh\u00e3, Portugal"}]},{"given":"S. M.","family":"Saraiva","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7279-5728","authenticated-orcid":false,"given":"R. F. P.","family":"Pereira","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Minho, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5230-639X","authenticated-orcid":false,"given":"M. M.","family":"Silva","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Minho, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4747-6535","authenticated-orcid":false,"given":"L. D.","family":"Carlos","sequence":"additional","affiliation":[{"name":"Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"P.","family":"Almeida","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Beira Interior, 6201-001 Covilh\u00e3, Portugal"},{"name":"CICS-UBI, University of Beira Interior, 6201-001 Covilh\u00e3, Portugal"}]},{"given":"M. C.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"},{"name":"CQ-VR, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]},{"given":"R. A. S.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7577-4938","authenticated-orcid":false,"given":"V. de Zea","family":"Bermudez","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"},{"name":"CQ-VR, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,3,14]]},"reference":[{"doi-asserted-by":"crossref","unstructured":"Sudhakar, Y.N., Selvakumar, M., and Bhat, K. (2018). Biopolymer Electrolytes-Fundamentals and Applications in Energy Storage, Elsevier. 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