期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 60, 期 10, 页码 2411-2417出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2003.12.016
关键词
macrocyclic; manganese(II); cobalt(II); nickel(II); copper(II)
类别
Manganese(II), cobalt(II), nickel(II), and copper(II) complexes are synthesized with a novel tetradentate ligand, viz. 1,5,9,13-tetraaza-6,14-dioxo-8,16-diphenylcyclohexadecane (L) and characterized by the elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, H-1 NMR, IR, electronic, and EPR spectral studies. The molar conductance measurements of the complexes in DMSO correspond to be nonelectrolyte nature for Mn(II), Co(II), and Cu(II) whereas 1:2 electrolytes for Ni(II) complexes. Thus, these complexes may be formulated as [M(L)X-2] and [Ni(L)]X-2, respectively (where M = Mn(II), Co(II), and Cu(II) and X = Cl- and NO3-). On the basis of IR, electronic, and EPR spectral studies an octahedral geometry has been assigned for Mn(II) and Co(H) complexes, square-planar for Ni(II) whereas tetragonal for Cu(II) complexes. The ligand and its complexes were also evaluated against the growth of bacteria and pathogenic fungi in vitro. (C) 2004 Elsevier B.V. All rights reserved.
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