Synthesis of Fe(II) and Cu(II) building blocks for metal-organic frameworks |
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Authors: | Rebecca H Laye |
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Institution: | a Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain b The University of Manchester, Oxford Road, M13 9PL Manchester, UK |
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Abstract: | In situ reaction of the aminobenzoic acids 2-aminobenzoic acid and 3,5-diaminobenzoic acid with salicylaldehyde provide easy access to the ligands 2-{(2-hydroxyphenyl)methylene}amino]benzoic acid (L1) and 3,5-bis{(2-hydroxyphenyl)methylene}amino]benzoic acid (L2). Addition of a Fe(II) or Cu(II) salt to the solution of the ligand yields the corresponding Fe and Cu complexes. The species synthesized have been structurally characterized by single-crystal X-ray diffraction. The Fe(II) complex Fe(L1)(MeOH)3] (1) crystallizes in the triclinic space group . The Cu(II) complex Cu(L1)] (2) is a one-dimensional chain and crystallizes in the monoclinic space group P21. The Cu(II) complex Et3NH]2Cu2(L2)2] (3) crystallizes in the monoclinic space group P21/n. The magnetic properties of 1, 2 and 3 have been studied, showing that the Cu(II) ions of 2 and 3 are ferromagnetically coupled. Complexes 1 and 3 have strong potential as metal-bearing building blocks for the synthesis of metal-organic frameworks. |
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Keywords: | Ferromagnetic coupling Building blocks Imine-based ligands Coordination complexes |
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