期刊
DALTON TRANSACTIONS
卷 43, 期 42, 页码 15950-15957出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt02366h
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Reaction of analgin (NaL) with Co(II), Ni(II) and Cu(II) salts in ethanol affords complexes of the type [ML2], which were characterized by elemental analysis, FT IR, UV-Vis, EPR, TG/DTA, magnetic susceptibility and conductance measurements. The copper(II) complex crystallizes in the orthorhombic Pbca space group. Analgin behaves as a mono-negatively tridentate ligand via pyrazolone O, sulfonate O and tertiary amino groups. The interaction of the tertiary nitrogen with Mn+ ions is the main factor which determines the stability of complexes as revealed from natural bond orbital analysis data, where the binding energy of [ML2] decreases with an increase in the bond length of the M-N bond. Time-dependent density functional theory calculations were applied in order to realize the electronic structures and to explain the related experimental observations. The anti-bacterial activity was studied on Staphylococcus aureus and Escherichia coli. Coordination of analgin to Ni(II) and Cu(II) leads to a significant increase in its antibacterial activity as compared with the Co(II) complex.
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