Synthesis, Characterization and Biological Activity of Symmetric Dinuclear Complexes Derived from a Novel Macrocyclic Compartmental Ligand
نویسنده
چکیده
Um novo ligante macrocíclico binucleador, N,N-bis(2,6-diiminometil-1hidroxifenil)malonoildicarboxamida, foi preparado. Seus complexos metálicos foram preparados pelo método da moldagem por metal, através das reações de 2,6-diformil-4-metilfenol, malonoil diidrazida com os cloretos metálicos de Cu(II), Ni(II), Co(II), Cd(II), Zn(II) e Hg(II), em methanol, que levaram à formação de uma série de complexos dinucleares. Os complexos foram caracterizados por análises elementares, medidas de conductividade, dados de susceptibilidade magnética, IR, UVVis, EPR, RMN e dados de espectrometrica de massas-FAB. A natureza dinuclear dos complexos foi confirmada pelas análises elementares e dados de susceptibilidade magnética, EPR e de espectrometria de massas-FAB. O ligante e os complexos de Cu(II), Ni(II), Co(II) e Zn(II) tiveram suas atividades antibacteriana e antifúngica testadas contra Escherichia coli, Staphyloccocus aureus, Aspergillus niger e Fusarium oxysporum. As medidas de susceptibilidade magnética dos complexos de Cu(II), Ni(II) e Co(II) revelaram que estes complexos exibem acoplamento antiferromagnético devido à presença de dois íons metálicos próximos um do outro. O espectro de massas-FAB do complexo de Cu(II) forneceu evidencia clara da sua natureza dinuclear. O ligante e os complexos exibiram atividade muito fraca contra as bactérias testadas, entretanto, o ligante mostrou-se ativo contra o fungo Fusarium oxysporum.
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