Ln2(O2CCH2PO3)2(H2O)3 · H2O (Ln = La, Pr, Nd, Sm): Layered lanthanide phosphonoacetates containing two-dimensional -Ln-O- linkages |
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| Authors: | Jin-Tang Li |
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| Affiliation: | State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China |
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| Abstract: | Four novel isostructural lanthanide phosphonate compounds with formula Ln2(O2CCH2PO3)2(H2O)3 · H2O [Ln = La (1), Pr (2), Nd (3), Sm (4)] have been prepared through hydrothermal reactions of phosphonoacetate acid and lanthanide nitrates. All show layered structures made up of {LnO9} polyhedra and {CPO3} tetrahedra with the lattice water molecules locating between the layers. Within the layer, chains of edge-sharing {LnO9} polyhedra are connected via corner-sharing by phosphonate oxygens forming a two-dimensional -Ln-O- linkage. Thermal analyses and XRD measurements reveal that the framework structures can be maintained up to 400 °C. |
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| Keywords: | Lanthanide Phosphonoacetate Layer structure |
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