期刊
INORGANICA CHIMICA ACTA
卷 358, 期 7, 页码 2332-2340出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2005.02.005
关键词
crystal structures; lanthanide(III) carboxylates; magnetic properties
Four lanthanide coordination polymers formulated as {[La(3)L(9)(H(2)O)(3)]EtOH(.)H(2)O}(n)1,{[Pr(2)L(6)(H(2)O)(2)]HL(.)H(2)O}(n)2,{[Dy(2)L(6)(H(2)O)]0.5HL(.)H(2)O}n 3 and {[Ho(2)L(6)(H(2)O)]0.5HL.H(2)O}(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. (c) 2005 Elsevier B.V. All rights reserved.
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