Iron clusters and oxygen-chemisorbed iron clusters

被引:23
作者
Wang, LS
Fan, JW
Lou, L
机构
[1] PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA
[2] RICE UNIV, RICE QUANTUM INST, HOUSTON, TX 77251 USA
[3] RICE UNIV, DEPT CHEM, HOUSTON, TX 77251 USA
[4] RICE UNIV, DEPT PHYS, HOUSTON, TX 77251 USA
关键词
D O I
10.1142/S0218625X9600125X
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photoelectron spectroscopy of size-selected Fe-n(-) (n = 3-24) clusters and oxygen-chemisorbed clusters FenO- (n = 1-16), has been studied at 3.49-eV photon energy with a magnetic-bottle time-of-flight photoelectron spectrometer. While the spectra of the pure iron clusters show rather sharp features in the whole size range, those of the oxygen-chemisorbed species are considerably different, with extensive sharp structures observed for n only up to 6. The electron affinities (EAs) of both the bare and chemisorbed clusters exhibit strong size variations. However, the first oxygenation of the iron clusters induces a systematic lowering of EA in the size range n = 9-15. Towards a complete molecular picture of these interesting clusters, density-functional calculations are being performed to determine the equilibrium cluster structures, oxygen chemisorption sites, and their electronic structures. The equilibrium structures obtained for FenO with n = 2-6 are reported.
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页码:695 / 699
页数:5
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