RT Journal Article
T1 High Proton Conductivity in a Flexible, Cross-Linked, Ultramicroporous Magnesium Tetraphosphonate Hybrid Framework
A1 Pérez-Colodrero, Rosario Mercedes
A1 Olivera-Pastor, Pascual
A1 Losilla, Enrique R.
A1 Hernández Alonso, Daniel
A1 García-Aranda, Miguel Ángel
A1 León-Reina, Laura
A1 Rius, Jordi
A1 Demadis, Konstantinos D.
A1 Moreau, Bernard
A1 Villemin, Didier
A1 Palomino, Miguel
A1 Rey, Fernando
A1 Cabeza-Díaz, Aurelio
K1 Química inorgánica
AB Multifunctional materials, especially those combining two or more properties of interest, are attracting immense attention due to their potential applications. MOFs, metal organic frameworks, can be regarded as multifunctional materials if they show another useful property in addition to the adsorption behavior. Here, we report a new multifunctional light hybrid, MgH6ODTMP·2H2O(DMF)0.5 (1), which has been synthesized using the tetraphosphonic acid H8ODTMP, octamethylenediamine-N,N,N′,N′-tetrakis(methylenephosphonic acid), by highthroughput methodology. Its crystal structure, solved by Patterson-function direct methods from synchrotron powder Xray diffraction, was characterized by a 3D pillared openframework containing cross-linked 1D channels filled with water and DMF. Upon H2O and DMF removal and subsequent rehydration, MgH6ODTMP·2H2O (2) and MgH6ODTMP·6H2O (3) can be formed. These processes take place through crystalline−quasi-amorphous−crystalline transformations, during which the integrity of the framework is maintained. A water adsorption study, at constant temperature, showed that this magnesium tetraphosphonate hybrid reversibly equilibrates its lattice water content as a function of the water partial pressure. Combination of the structural study and gas adsorption characterization (N2, CO2, and CH4) indicates an ultramicroporous framework. High-pressure CO2 adsorption data are also reported. Finally, impedance data indicates that 3 has high proton conductivity σ = 1.6 × 10−3 S cm−1 at T = 292 K at ∼100% relative humidity with an activation energy of 0.31 eV.
PB American Chemical Society
YR 2012
FD 2012-07-03
LK https://hdl.handle.net/10630/21038
UL https://hdl.handle.net/10630/21038
LA eng
NO Inorg. Chem. 2012, 51, 7689−7698
NO Proyecto nacional MAT2010-15175 (MICINN, España)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 22 ene 2026