Synthesis, Spectral, Thermogravimetric, XRD, Molecular Modelling and Potential Antibacterial Studies of Dimeric Complexes with Bis Bidentate ON–NO Donor Azo Dye LigandsReportar como inadecuado




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Journal of ChemistryVolume 2013 2013, Article ID 653540, 11 pages

Research Article

P.G. Department of Chemistry, G.M. Autonomous College, Sambalpur, Odisha 768 004, India

Department of Chemistry, Government College of Engineering, Kalahandi, Bhawanipatna, Odisha 766 002, India

Received 14 May 2013; Accepted 23 September 2013

Academic Editor: Mallikarjuna Nadagouda

Copyright © 2013 Bipin Bihari Mahapatra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The dimeric complexes of CoII, NiII, CuII, ZnII, CdII, and HgII with two new symmetrical ON–NO donor bis bidentate tetradentate azo dye ligands, LH2 = 4,4′-bis4′-hydroxyquinolinolinylazodiphenylsulphone, and L′H2 = 4,4′-bisacetoacetanilideazodiphenylsulphone have been synthesized. The metal complexes have been characterised by elemental analytical, conductance, magnetic susceptibility, IR, electronic spectra, ESR, NMR, thermogravimetry, X-ray diffraction powder pattern spectra, and molecular modelling studies. The CoII and NiII complexes are found to be octahedral, CuII complexes are distorted octahedral, and a tetrahedral stereochemistry has been assigned to ZnII, CdII, and HgII complexes. The thermogravimetric study indicates that compounds are quite stable. The energy optimized structures are proposed using the semiempirical ZINDO-1 quantum mechanical calculations. The potential antibacterial study of the ligands and some metal complexes has been made with one gram positive bacteria Staphylococcus aureus and one gram negative bacteria E. coli which gives encouraging results. Both the CoII complexes are found to possess monoclinic crystal system.





Autor: Bipin Bihari Mahapatra, Ramani Ranjan Mishra, and Ashish Kumar Sarangi

Fuente: https://www.hindawi.com/



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