2026-06-01T18:12:21Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/165502026-02-03T12:19:07Zcom_10630_2254col_10630_37959

New multifunctional sulfonato-containing metal phosphonates proton conductors Salcedo, Inés R. Bazaga-García, Montse Pérez-Colodrero, Rosario Mercedes Xanthopoulos, Konstantinos Demadis, Konstantinos D. Stock, Norbert Cabeza-Díaz, Aurelio Ramírez-Losilla, Enrique Olivera-Pastor, Pascual Protones Anchoring of acidic functional groups to organic linkers acting as ligands in metal phosphonates has been demonstrate to be a valid strategy to develop new proton conductor materials, which exhibit tunable properties and are potentially applicable to proton exchange membranes, such as those used in PEMFCs [1,2]. In this work, the structural and proton conductivity properties of several families of divalent and trivalent metal amino-sulfophosphonates are presented. The chosen ligand, (H2O3PCH2)2-N-(CH2)2-SO3H, was reacted with the appropriate metal salt using highthrough-put screening and/or microwave-assisted synthesis. Different crystal structures haven been solved displaying a variety of metal ligand coordination modes, in whose frameworks acidic groups contribute to create strong H-bond networks; together with lattice and bound water molecules. Proton conductivity values oscillate between 10-4 and 10-2 S.cm-1, at 80 ºC and 95 % relative humidity, most of them showing activation energies characteristic of a Grotthuss-type proton transport mechanism. 2018-10-01T07:15:17Z 2018-10-01T07:15:17Z 2018 2018-10-01 conference output https://hdl.handle.net/10630/16550 eng 1st European Workshop on Metal Phosphonates Chemistry Swansea U.K. 19/09/2018 http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Attribution-NonCommercial-NoDerivatives 4.0 Internacional