Coulomb- and antiferromagnetic-induced fission in doubly charged cubelike fe-s clusters.
We report the observation of symmetric fission in doubly charged Fe-S cluster anions, [Fe(4)S(4)X(4)](2-)-->2[Fe(2)S(2)X(2)](-) (X=Cl,Br), owing to both Coulomb repulsion and antiferromagnetic coupling. Photoelectron spectroscopy shows that both the parent and the fission fragments have similar electronic structures and confirms the inverted energy schemes due to the strong spin polarization of the Fe 3d levels. The current observation provides direct confirmation for the unusual spin couplings in the [Fe(4)S(4)X(4)](2-) clusters, which contain two valent-delocalized and ferromagnetically coupled Fe2S2 subunits.
Yang
Xin
X
Department of Physics, Washington State University, 2710 University Drive, Richland 99352, USA.
Wang
Xue-Bin
XB
Niu
Shuqiang
S
Pickett
Chris J
CJ
Ichiye
Toshiko
T
Wang
Lai-Sheng
LS
D004563:Electrochemistry; D058085:Iron Compounds / Q000737:chemistry*; D007506:Iron-Sulfur Proteins / Q000737:chemistry; D008958:Models, Molecular; D021241:Spectrometry, Mass, Electrospray Ionization; D013057:Spectrum Analysis; D013457:Sulfur Compounds / Q000737:chemistry*
D058085:Iron Compounds; D007506:Iron-Sulfur Proteins; D013457:Sulfur Compounds