RESUMO
In non-aqueous solvent, a new amino-acid schiff base, 1-phenyl-3-methyl-4-benzoyl pyrazolone-5-beta-alanine (HL) was synthesized by a reaction of beta-alanine with benzoylpyrazolone, and its ten rare earth complexes were obtained from refluxing a solution of schiff base and rare earth nitrates. On the basis of elemental analysis and molar conductance, the general formula of the complexes, [REL2NO3] nH2O (RE=La, Sm, Eu, Tb, Y, n=2; RE=Pr, Nd, n = 1; RE=Dy, Er, Yb, n=3), is given. These were characterized by IR, UV-Visible, 1H NMR, 13C NMR and fluorescence. The results show that the schiff base is a tridentate ligand, and the rare earth ions exhibit a coordination of eight in the complexes. In visible spectra, the supersensitive transitions of the Er complex at 522 nm (4 I15/2 -->2 H11/2, 4 S3/2 ) and that of the Nd complex at 573, 584 nm (4I9/2 -->2 G7/2 + 4G5/2) can be observed. Fluorescence of the complexes was produced principally by f-f transition of central ion RE3+, and the ligand has little influence on lightening role. The order of relative intensity of fluorescence of the complexes is ITb > ISm > IEu > IDy.
Assuntos
Alanina/análogos & derivados , Metais Terras Raras/química , Compostos Organometálicos/química , Pirazolonas/química , beta-Alanina/química , Alanina/síntese química , Alanina/química , Disprósio/química , Európio/química , Fluorescência , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Compostos Organometálicos/síntese química , Samário/química , Bases de Schiff/síntese química , Bases de Schiff/química , Espectrometria de Fluorescência , Espectrofotometria Infravermelho , Espectrofotometria Ultravioleta , Térbio/químicaRESUMO
A new Schiff base containing sulphur, 1-phenyl-3-methyl-4-(alpha-furoyl) pyrazolone-5-thiosemicarbazone (HL) and its Zn(II), Cd(II) and Co(II) complexes have been synthesized. On the basis of elemental analysis and molar conductance, the general formulae of the complexes, [ZnL2] x 1.5H2O, [CdL2] x C2H5OH and [CoL2] x H2O, were given. They were characterized by IR, UV-Visible, 1H NMR, 13C NMR and magnetic moments. The results show that the metal ions exhibit coordination of six in the complexes. The antibacterial experiments indicate that they have high antibacterial activities against S. aureus, B. subtilis, E. coli, E. carotovora, and C. flaccumfaciens.
Assuntos
Antibacterianos/química , Compostos Organometálicos/química , Pirazolonas/química , Tiossemicarbazonas/química , Antibacterianos/síntese química , Antibacterianos/farmacologia , Bacillus subtilis/efeitos dos fármacos , Bacillus subtilis/crescimento & desenvolvimento , Cádmio/química , Cobalto/química , Escherichia coli/efeitos dos fármacos , Escherichia coli/crescimento & desenvolvimento , Cinética , Espectroscopia de Ressonância Magnética , Magnetismo , Testes de Sensibilidade Microbiana , Estrutura Molecular , Compostos Organometálicos/síntese química , Compostos Organometálicos/farmacologia , Bases de Schiff/química , Espectrofotometria Infravermelho , Espectrofotometria Ultravioleta , Staphylococcus aureus/efeitos dos fármacos , Staphylococcus aureus/crescimento & desenvolvimento , Temperatura , Tiossemicarbazonas/síntese química , Tiossemicarbazonas/farmacologia , Zinco/químicaRESUMO
Three novel bis-schiff base complexes [B(PMaFP)2en]Ac, [B(PMaFP)2pen]Ac and [B(PMTHP)2en]Ac have been synthesized, where (HPMalphaFP)2 en = N,N'-bis [(1-phenyl-3-methyl-5-oxo-4-pyrazolinyl) alpha-furylmethylidyne] ethylenediimine, (HPMalphaFP)2pen = N,N'-bis[(1-phenyl-3-methyl-5-oxo-4-pyrazolinyl) alpha-furylmethylidyne]-o-phenylenediimine and (HPMTHP)2en = N,N'-bis[(1-phenyl-3-methyl-5-oxo-4-pyrazolinyl)-2-thenoylmethylidyne] ethylenediimine. They were characterized by elemental analysis, IR, UV-Vis, 1H NMR, 13C NMR, and molar conductance measurements. The results show that the bis-schiff base is a quadridentate ligand and boron is four-coordinated in the complexes.
RESUMO
Two novel bis-schiff base complexes [UO2 (PMTHP)2en] and [Th(PMTHP)2en(NO3)2] have been synthesized, where (PMTHP)2en = N,N'-bis[(1-phenyl-3-methyl-5-oxo-5-pyrazolinyl)- 2-thenoylmethylidyne] ethylenediamine, and characterized by elemental analysis, IR, UV-Vis, 1H NMR, 13C NMR and molar conductance measurements. The results show that the bis-schiff base is a quadridentate ligand and the nitrate a bidentate ligand, and the uranyl and thorium ions exhibit coordination of six and eight in the complexes, respectively.
