Synthesis, characterization, and X-ray crystal structures of metal complexes with new Schiff-base ligands and their antibacterial activities
- 1 March 2012
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Coordination Chemistry
- Vol. 65 (6), 1004-1016
- https://doi.org/10.1080/00958972.2012.665904
Abstract
Two new potentially hexadentate Schiff bases, [H2L1] and [H2L2], were prepared by condensation of 2-(3-(2-aminophenoxy)naphthalen-2-yloxy)benzenamine with 3,5-di-tert-butyl-2-hydroxy benzaldehyde and o-vanillin, respectively. Reaction of these ligands with cobalt(II) chloride, copper(II) perchlorate, and zinc(II) nitrate gave complexes ML. The ligands and their complexes have been characterized by a variety of physico-chemical techniques. The solid and solution state investigations show that the complexes are neutral. Molecular structures of [CuL1], [CoL1] · C7H8, and [ZnL2] · CH3CN, which have been determined by single-crystal X-ray diffraction, indicate that [CuL1] and [ZnL2] · CH3CN display distorted square planar and distorted trigonal-bipyramidal geometry, respectively; the geometry around cobalt in [CoL1] · C7H8 is almost exactly between trigonal bipyramidal and square pyramidal. The synthesized ligands and their complexes were screened for their antibacterial activities against eight bacterial strains and the ligands and complexes have antibacterial effects. The most effective ones are [CuL2] against Proteus vulgaris, Serratia marcescens, Staphylococcus subtilis, [H2L1] against S. subtilis, and [H2L2] against S. subtilis.Keywords
This publication has 71 references indexed in Scilit:
- Synthesis, characterization, catalase functions and DNA cleavage studies of new homo and heteronuclear Schiff base copper(II) complexesPolyhedron, 2009
- Controlling the molecular aggregation. An amphiphilic Schiff-base zinc(II) complex as supramolecular fluorescent probeDalton Transactions, 2009
- Catalytic activities of Schiff base transition metal complexesCoordination Chemistry Reviews, 2007
- Magnetic assemblies based on Mn(III) salen analoguesCoordination Chemistry Reviews, 2007
- Studies on some salicylaldehyde Schiff base derivatives and their complexes with Cr(III), Mn(II), Fe(III), Ni(II) and Cu(II)Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007
- Synthesis, characterization and biological activity of some platinum(II) complexes with Schiff bases derived from salicylaldehyde, 2-furaldehyde and phenylenediamineSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007
- Metallobiosites and their synthetic analogues—a belief in synergism1997–1998 Tilden LectureChemical Society Reviews, 1999
- Coordination compounds of copper, nickel and iron with Schiff bases derived from hydroxynaphthaldehydes and salicylaldehydesCoordination Chemistry Reviews, 1992
- Dioxygen affinities of synthetic cobalt Schiff base complexesInorganic Chemistry, 1987
- Structure of a Monomeric Oxygen-carrying ComplexNature, 1972