RT Conference Proceedings
T1 Tunable crystal structure and proton conductivity of lanthanide nitrilotrismethylphosphonates
A1 Salcedo, Inés R.
A1 Pérez-Colodrero, Rosario Mercedes
A1 Hix, Gary B.
A1 Cabeza-Díaz, Aurelio
A1 Bazaga-García, Montse
A1 Ramírez-Losilla, Enrique
A1 Olivera-Pastor, Pascual
K1 Compuestos orgánicos
AB Metal phosphonates are multifunctional solids with remarkable stability and proton conducting properties owingto their structure is usually composed of extended hydrogen-bond networks that favor proton transfer pathways [1].Moreover, these properties can be enhanced by appropriate modification of the synthesis conditions [2, 3].In this communication, a new family of isostructural 2D layered compounds based on lanthanide nitrilotris-methylphosphonatesis reported. These compounds have been isolated at room temperature and have the general formula Ln[N(CH2)3(PO3H2)2(PO3H)(H2O)]SO4·2H2O (Ln= Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb). The coordination environmentof Ln3+ is composed by eight oxygen atoms from three different ligands and two oxygens from bound waters.This connectivity creates positive charged layers connected to sulfate ions through hydrogen-bonds. These compoundsshow promising proton conductivity with values ranging between 7.6·10-2 and 3.8·10-2 S·cm-1 at 80 °C and 95% RHand low activation energy corresponding to Grotthuss-type proton transfer mechanism. In addition, a structural transformationoccurs at T > 70 °C accompanied by a remarkable enhanced conductivity. Studies on the structure-properties relationships will be discussed.
YR 2018
FD 2018-10-01
LK https://hdl.handle.net/10630/16552
UL https://hdl.handle.net/10630/16552
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.MINECO: MAT2016-77648-RJunta Andalucía: P12-FQM-1656 y FQM-113
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026