Crystal structure and magnetic properties of lanthanide-trans-2-butenoate polymers (Ln = La, Pr, Dy, Ho)
Four lanthanide coordination polymers formulated as {[La3L 9(H2O)3]EtOH·H2O} n 1, {[Pr2L6(H2O) 2]HL·H2O}n 2, {[Dy2L 6(H2O)]0.5HL·H2O}n 3 and {[Ho2L6(H2O)]0.5HL·H2O} n 4 and HL = trans-2-butenoic acid have been synthesized from the corresponding pure lanthanide oxide and HL acid in water at pH 3. The...
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2005
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201693_v358_n7_p2332_Baggio http://hdl.handle.net/20.500.12110/paper_00201693_v358_n7_p2332_Baggio |
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| Sumario: | Four lanthanide coordination polymers formulated as {[La3L 9(H2O)3]EtOH·H2O} n 1, {[Pr2L6(H2O) 2]HL·H2O}n 2, {[Dy2L 6(H2O)]0.5HL·H2O}n 3 and {[Ho2L6(H2O)]0.5HL·H2O} n 4 and HL = trans-2-butenoic acid have been synthesized from the corresponding pure lanthanide oxide and HL acid in water at pH 3. The compounds were characterized by chemical analysis, IR spectroscopy, thermogravimetry, variable-temperature magnetic susceptibility and single crystal X-ray diffraction studies. A common feature in these materials is the presence of two differentiated lanthanide nodes linked by carboxylates into extended chains. These are further connected by inter- and intra-molecular hydrogen-bonds involving ligand and solvate molecules. Weak ferromagnetic interactions appear to be operative in the Dy material. © 2005 Elsevier B.V. All rights reserved. |
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