RT Journal Article
T1 Luminescent and Proton Conducting Lanthanide Coordination Networks Based On a Zwitterionic Tripodal Triphosphonate
A1 Bazaga-García, Montse
A1 Angeli, Giasemi K.
A1 Papathanasiou, Konstantinos E.
A1 Salcedo, Inés R.
A1 Olivera-Pastor, Pascual
A1 Losilla, Enrique R.
A1 Choquesillo-Lazarte, Duane
A1 Hix, Gary B.
A1 Cabeza-Díaz, Aurelio
A1 Demadis, Konstantinos D.
AB The synthesis, structural characterization, luminescenceproperties, and proton conduction performance of anew family of isostructural cationic 2D layered compounds arereported. These have the general formula [Ln(H4NMP)-(H2O)2]Cl·2H2O [Ln = La3+, Pr3+, Sm3+, Eu3+, Gd3+, Tb3+,Dy3+, Ho3+, H6NMP = nitrilotris(methylphosphonic acid)],and contain Cl− as the counterion. In the case of Ce3+, a 1Dderivative, [Ce2(H3NMP)2(H2O)4]·4.5H2O, isostructural withthe known lanthanum compound has been isolated by simplycrystallization at room temperature. The octa-coordinatedenvironment of Ln3+ in 2D compounds is composed by sixoxygen atoms from three different ligands and two oxygensfrom each bound water. Two of the three phosphonate groupsact as both chelating and bridging linkers, while the third phosphonate group acts solely as a bridging moiety. The materials arestable at low relative humidity at less at 170 °C. However, at high relative humidity transform to other chloride-free phases,including the 1D structure. The proton conductivity of the 1D materials varies in a wide range, the highest values correspondingto the La derivative (σ ≈ 2 × 10−3 S·cm−1 at RH 95% and 80 °C). A lower proton conductivity, 3 × 10−4 S·cm−1, was measuredfor [Gd(H4NMP)(H2O)2]Cl·2H2O at 80 °C, which remains stable under the work conditions used. Absorption andluminescence spectra were recorded for selected [Ln(H4NMP)(H2O)2]Cl·2H2O compounds. In all of them, the observedtransitions are attributed solely to f−f transitions of the lanthanide ions present, as the H4NMP2− organic group has nomeasurable absorption or luminescence properties.
PB American Chemical Society
YR 2016
FD 2016-07-14
LK https://hdl.handle.net/10630/21022
UL https://hdl.handle.net/10630/21022
LA eng
NO Inorg. Chem. 2016, 55, 7414−7424
NO Proyecto nacional MAT2013-41836-R  (MINECO) y Proyecto de la Junta de Andalucía P12-FQM-1656
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026