RT Journal Article
T1 Structural variability in M2+ 2-hydroxyphosphonoacetate moderate proton conductors
A1 Pérez-Colodrero, Rosario Mercedes
A1 Salcedo, Inés R.
A1 Bazaga-García, Montse
A1 Milla-Pérez, Diego F.
A1 Durán-Martín, Jonatan D.
A1 Ramírez-Losilla, Enrique
A1 Moreno-Real, Laureano
A1 Rius, Jordi
A1 García-Aranda, Miguel Ángel
A1 Demadis, Konstantinos D.
A1 Olivera-Pastor, Pascual
A1 Cabeza-Díaz, Aurelio
K1 Conductividad eléctrica
K1 Semimetales
K1 Polímeros organometálicos
K1 Química del estado sólido
AB The structural variability of two series of Mg2+- and Zn2+- 2-hydroxyphosphonoacetates have beenstudied in the range of 25–80 °C and 95 % relative humidity in order to correlate the structure with theproton conductivity properties. In addition to selected previously reported 1D, 2D and 3D materials, a newcompound, KZn6(OOCCH(OH)PO3)4(OH)·5H2O (KZn6-HPAA-3D), has been prepared and thoroughly characterized.The crystal structure of this solid, solved ab initio from synchrotron X-ray powder diffraction data,consists of a negatively charged 3D framework with K+ ions, as compensating counterions. It also containswater molecules filling the cavities in contrast to the potassium-free 3D anhydrous NH4Zn(OOCCH(OH)PO3)(NH4Zn-HPAA-3D). In the range of temperature studied, the 1D materials exhibit a 1D → 2D solid-state transition.At 80 °C and 95 % RH, the 2D solids show moderate proton conductivities, between 2.1 × 10 − 5 S·cm − 1 and6.7 × 10− 5 S·cm− 1. The proton conductivity is slightly increased by ammonia adsorption up to 2.6 × 10 − 4 S·cm − 1,although no ammonia intercalation was observed. As synthesized KZn6-HPAA-3D exhibits a low proton conductivity,1.6 × 10− 6 S·cm− 1, attributed to the basic character of the framework and a low mobility of water molecules.However, this solid transforms to the 2D phase, Zn(OOCCH(OH)PO3H)·2H2O, upon exposure to dry HCl(g), whichenhances the proton conductivity with respect to the as-synthesized 2D material (4.5 × 10− 4 S·cm− 1). On the otherhand, NH4Zn-HPAA-3D exhibited a higher proton conductivity, 1.4 × 10− 4 S·cm− 1, than the K+ analog.
PB De Gruyter
YR 2017
FD 2017
LK https://hdl.handle.net/10630/20986
UL https://hdl.handle.net/10630/20986
LA eng
NO Colodrero, R., Salcedo, I., Bazaga-García, M., Milla-Pérez, D., Durán-Martín, J., Losilla, E., Moreno-Real, L., Rius, J., Aranda, M., Demadis, K., Olivera-Pastor, P., & Cabeza, A. (2017). Structural variability in M2+ 2-hydroxyphosphonoacetate moderate proton conductors. Pure and Applied Chemistry, 89(1), 75–87. https://doi.org/10.1515/pac-2016-1003
NO Proyecto MAT2013-41836-R del MINECO y proyecto P12-FQM-1656 de la Junta de Andalucía
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026