RT Conference Proceedings
T1 Synthesis and proton conduction properties of lanthanide amino-sulfophosphonates
A1 Cabeza-Díaz, Aurelio
A1 Bazaga-García, Montse
A1 Pérez-Colodrero, Rosario Mercedes
A1 Salcedo, Inés R.
A1 Villemin, Didier
A1 Olivera-Pastor, Pascual
A1 Losilla, Enrique R.
K1 Polímeros
AB Crystalline acid-functionalized metal phosphonates are potential candidates as proton conducting electrolytes. Their frameworks can be chemically modified to contain proton carriers such as acidic groups (P-OH; -SO3H, -COOH,…) and guest molecules (H2O, NH3,…) that generates hydrogen bond networks stable in a wide range of temperature [1,2].In this work, focus is laid on properties derived from the combination of lanthanide ions with the amino-sulfophosphonate ligand (H2O3PCH2)2-N-(CH2)2-SO3H. Hightrough-put screening was followed to reach the optimal synthesis conditions under solvothermal conditions at 140 ºC. Isolated polycrystalline solids, Ln[(O3PCH2)2-NH-(CH2)2-SO3H].2H2O (Ln= La, Pr and Sm), crystallize in the monoclinic (La) and orthorhombic (Pr and Sm) systems with unit cell volume of ~2548 Å3. Preliminary proton conductivity measurements for Sm derivative have been carried out between 25º and 80 ºC at relative humidity (RH) values of 70 % and 95 %. The sample exhibits enhanced conductivity at high RH and T (Figure 1) and constant activation energies of 0.4 eV, typical of a Grothuss mechanism of proton.
YR 2016
FD 2016
LK http://hdl.handle.net/10630/11677
UL http://hdl.handle.net/10630/11677
LA spa
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. FQM-1656; MAT2013-41836-R
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026