Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 29, Issue 7, Pages 443-449Publisher
WILEY
DOI: 10.1002/aoc.3313
Keywords
benzimidazole; transition metal complexes; crystal structure; electrochemical property; antioxidation
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Funding
- National Natural Science Foundation of China [21367017]
- Fundamental Research Funds for the Gansu Province Universities [212086]
- Natural Science Foundation of Gansu Province [1212RJZA037]
- 'Qing Lan' Talent Engineering Funds
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Bis(N-ethylbenzimidazol-2-ylmethyl)aniline (Etbba) and its transition metal complexes, [Cu(Etbba)(Cl)(2)]DMF (1), [Mn(Etbba)(Cl)(2)] (2) and [Ni(Etbba)(Cl)(2)] (3), have been synthesized and characterized on the basis of elemental analysis, molar conductivity, UV-visible, infrared and NMR spectroscopies and X-ray crystallography. The coordination environment of complex 1 can be described as distorted square-based pyramidal, while complexes 2 and 3 each have a distorted trigonal bipyramidal geometry. Cyclic voltammograms of complex 1 indicate an electrochemically quasi-reversible Cu2+/Cu+ couple. In addition, the antioxidant activities of the free ligand and its complexes were investigated using the superoxide and hydroxyl radical scavenging methods in vitro. Complexes 1, 2, 3 are found to possess potent hydroxyl radical scavenging activity and to be better than standard antioxidants like vitamin C and mannitol. Furthermore, complexes 1 and 2 exhibit significant superoxide radical activity. Copyright (c) 2015 John Wiley & Sons, Ltd.
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