Electronic structure and intrinsic redox properties of [2Fe-2S]+ clusters with tri- and tetracoordinate iron sites

被引:13
作者
Fu, YJ
Niu, SQ
Ichiye, T
Wang, LS
机构
[1] Washington State Univ, Dept Phys, Richland, WA 99352 USA
[2] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA
[3] WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA
[4] Georgetown Univ, Dept Chem, Washington, DC 20057 USA
关键词
D O I
10.1021/ic048559d
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Using potentially bidentate ligands (-SC2H4NH2), we produced [2Fe-2S](+) species of different coordination geometries by fission of [4Fe-4S](2+) complexes. Even though the ligands are monodenlate in the cubane complexes, both mono- and bidentate complexes were observed in the [2Fe] fission products through self-assembly because of the high reactivity of the tricoordinate iron sites. The electronic structure of the [2Fe] species was probed using photoelectron spectroscopy and density functional calculations. It was found that tetracoordination significantly decreases the electron binding energies of the [2Fe] complexes, thus increasing the reducing capability of the [2Fe-2S](+) clusters.
引用
收藏
页码:1202 / 1204
页数:3
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