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Lah, Myoung Soo
Frontier Energy Storage Material Lab.
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Synthesis and characterization of mononuclear octahedral Fe(III) complex containing a biomimetic tripodal ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid

Author(s)
Moon, DohyunKim, JunghyunLah, Myoung Soo
Issued Date
2006-10
URI
https://scholarworks.unist.ac.kr/handle/201301/6046
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33750496261
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.27, no.10, pp.1597 - 1600
Abstract
The mononuclear iron complex 1, Fe-III (Hbida)Cl(H2O), was synthesized using a tripodal tetradentate ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid (H(3)bida), which has two carboxylate groups, one benzimidazoyl group, and one tertiary amine where it serves as a tetradentate chelating ligand for the octahedral Fe(III) ion. The four equatorial positions of the octahedral complex are occupied by two monodentate carboxylates, a benzimidazole nitrogen, and an oxygen of a water molecule. One of the axial positions is occupied by an apical nitrogen of the Hbida and the other by a chloride anion. The mononuclear octahedral complex 1 mimics the geometry of the key intermediate structure of the catalytic reaction cycle proposed for the FeSODs, which is a distorted octahedral geometry with three histidyl imidazoles, an aspartyl carboxylate, a superoxide anion, and a water molecule. The redox potential of complex 1, E-1/2 is -0.11V vs. Ag/AgCl (0.12 V vs. NHE), which is slightly lower than those reported for the most FeSODs. The magnetic susceptibility of complex 1 at room temperature is 5.83 mu(B) which is close to that of the spin only value, 5.92 mu(B) of high-spin d(5) Fe(III).
Publisher
KOREAN CHEMICAL SOC
ISSN
0253-2964
Keyword (Author)
iron(III) complexsuperoxide dismutasetripodal tetradentate ligandbiomimetic
Keyword
MANGANESE SUPEROXIDE-DISMUTASEESCHERICHIA-COLIACTIVE-SITECRYSTAL-STRUCTUREIRON(III) COMPLEXESCATALYTIC ACTIVITYOXIDATIVE STRESSFERRIC COMPLEXMIMICSSOD

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