Spectroscopic, redox and biological activities of transition metal complexes with ons donor macrocyclic ligand derived from semicarbazide and thiodiglycolic acid

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Sulekh Chandra, Sangeetika

Abstract

A novel macrocyclic Schiff base ligand (2,5,9,12,14,18-hexaoxo-7,16-dithia-1,3,4,10,11,13-hexaazacycloocta-decane (H6L) with N4S2 coordinating sites was prepared by the reaction of the semicarbazide and thiodiglycolic acid. The transition metal complexes with macrocyclic ligand were synthesized and characterized by elemental analyses, magnetic susceptibility measurements, molar conductance, IR, electronic, and EPR spectral studies. Mass, 1H NMR and IR spectral techniques suggest the structural features of macrocyclic ligand. Magnetic and electronic spectral studies suggest an octahedral geometry of complexes. Electrochemical behaviour of cobalt, nickel and copper complexes were determined by cyclic voltammetry. The cyclic voltammogram of the copper complex at room temperature shows a quasi-reversible peaks for Cu(III)-->Cu(II) and Cu(II)-->Cu(I) couples. The macrocyclic ligand and its complexes show growth inhibitory activity against pathogenic bacteria and plant pathogenic fungi A. niger, A. alternata and P. variotii. Most of the complexes have higher activities than that of free ligand.

Citations

May 15, 2012·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Azza A A Abou-Hussein, Wolfgang Linert
May 23, 2012·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Abdel-Nasser M A AlaghazTarek M El-Gogary
Nov 26, 2010·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Amit Kumar Sharma, Sulekh Chandra
Dec 25, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sulekh ChandraSumit Kumar
Aug 18, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Azza A A Abu-Hussen, Wolfgang Linert
Jan 27, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sulekh Chandra, Amit Kumar Sharma
Aug 6, 2008·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sulekh ChandraAmit Kumar Sharma
Aug 23, 2005·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sulekh Chandra, Lokesh Kumar Gupta
Sep 28, 2013·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Azza A Abou-Hussein, Wolfgang Linert
Dec 29, 2006·Chemistry & Biodiversity·Pulimamidi R Reddy, Kandibanda S Rao
Apr 13, 2017·BJPsych Bulletin·Michael UttersonRina Dutta
Mar 3, 2021·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Ramaiah KonakanchiLaxma Reddy Kotha

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