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• W2002390866 abstract "o-phenylene diamines, dehydroacetic acid (DHA) 및 p-chloro benzaldehyde에서 유도된 세자리 Schiff 염기 리간드인 4-hydroxy-3(1-{2-(benzylideneamino)-phenylimino}-ethyl)-6-methyl-2H-pyran-2-one (HL)의 Cu(II), Ni(II), Co(II), Mn(II) 및 Fe(III) 착물의 형성상수와 항미생물 활성과의 관계를 연구하였다.리간드와 착물은 원소분석, 전도도, 자기수자율, 열분석, X-선 회절, IR, <TEX>$^1H$</TEX>-NMR, UV-vis 및 질량 스펙트럼으로 특성조사를 하였다. 분석데이터로부터 착물들의 화학량론비가 1:2 (금속:리간드)임을 알았다. 금속 착물들의 몰 전도도 값은 이들의 비전해질 성질을 의미한다. X-선 회절 데이터에서 Ni(II) 착물은 단사정계 그리고 Cu(II) 및 Co(II) 착물은 삼사정계 결정계임을 규명하였다. IR 스펙트럼 데이터로부터 리간드는 중심금속에 대해 ONN 주개원자 배열의 세자리 리간드로 행동함을 알았다. 열적 행동 (TG/DTA)과 Coats-Redfern 법에 의해 계산한 반응속도 파라메터는 착물형성 과정에서 좀 더 질서 있는 활성화 상태를 제안하고 있다. 착물의 양성자화 상수를 THF:물 (60:40) 용액, <TEX>$25^{circ}C$</TEX> 및 이온세기 <TEX>${mu}=0.1;M$</TEX> (<TEX>$NaClO_4$</TEX>)에서 전위차법으로 측정하였다. Staphylococcus aureu 및 Escherichia coli.에 대한 항박테리아 활성을 시험관에서 조사하였다. 또한 Aspergillus Niger 및 Trichoderma에 대한 항세균 활성도 조사하였다. 금속 이온 및 착물의 안정도가 항미생물학적 활성에 미치는 영향을 고찰하였다. A relation between antimicrobial activities and the formation constants of solid complexes of Cu(II), Ni(II), Co(II), Mn(II) and Fe(III) with tridentate Schiff base ligand, 4-hydroxy-3(1-{2-(benzylideneamino)-phenylimino}-ethyl)-6-methyl-2Hpyran-2-one (HL) derived from o-phenylene diamines, dehydroacetic acid (DHA) and p-chloro benzaldehyde have been studied. The ligand and metal complexes were characterized by elemental analysis, conductivity, magnetic susceptibility, thermal analysis, X-ray diffraction, IR, <TEX>$^1H$</TEX>-NMR, UV-vis and mass spectra. From the analytical data, the stiochiometry of the complexes was found to be 1:2 (metal:ligand) with octahedral geometry. The molar conductance values suggest the nonelectrolytic nature of metal complexes. The X-ray diffraction data suggests monoclinic crystal system for Ni(II) and orthorhombic crystal system for Cu(II) and Co(II) complexes. The IR spectral data suggest that the ligand behaves as tridentate ligand with ONN donor atoms sequence towards central metal ion. Thermal behavior (TG/DTA) and kinetic parameters calculated by Coats-Redfern method suggests more ordered activated state in complex formation. The protonation constants of the complexes were determined potentiometrically in THF:water (60:40) medium at <TEX>$25^{circ}C$</TEX> and ionic strength <TEX>${mu}=0.1;M$</TEX> (<TEX>$NaClO_4$</TEX>). Antibacterial activities in vitro were performed against Staphylococcus aureu and Escherichia coli. Antifungal activities were studied against Aspergillus Niger and Trichoderma. The effect of the metal ions and stabilities of complexes on antimicrobial activities are discussed." @default.
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• W2002390866 date "2010-10-20" @default.
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• W2002390866 title "Synthesis, Potentiometric, Spectral Characterization and Microbial Studies of Transition Metal Complexes with Tridentate Ligand" @default.
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