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Citation: Yu Zhong-De, Zhang Nan, Feng Wan-Yong, Wu Xiao-Jun, Gao Zhen, Zhu Qi-He, Kong Fan-Ao, Zheng Lan-Sun, Huang Rong-Bin. The Production and UV Photodissociation of Iron-sulfur Binary Clusters[J]. Acta Physico-Chimica Sinica, ;1993, 9(06): 808-814. doi: 10.3866/PKU.WHXB19930616 shu

The Production and UV Photodissociation of Iron-sulfur Binary Clusters

1.
State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080; Department of Chemistry, Xiamen University, Xiamen 361006

Received Date: 9 August 1992
Available Online: 15 December 1993

The iron-sulfur cluster ions, Fe_nS_m~+(n=1-13, m=1-13), were produced by diredt laser vaporization of a solid sample containing a mixture of iron and sulfur powder. UV photodissociation of the cluster ions was studied with a tandem time-of-flight mass spectrometer. It was found that all the cluster ions with compositions of m=n, m=n-1 or m=n+5 have relatively larger abundaces, indicating that they were more stable. The photodissociation results of Fe_nS_m~+ ions showed that, when n≈m, the main channels were losses of neutral S atoms until n≈m, while for parent ions with n≈m, the main product ions have the m=n or m=n-1 compositions. Form these experimental results, it was proposed that the Fe_nS_n~+ ions might have structures similar to those of the Fe_nS_n cores in iron-sulfur proteins, while the structures of the Fe_nS_m~+ (m>n) cluster ions could be considered to have a pattern of the Fe_nS_n~+ cores with some peripheral S atoms.
- Iron-surfur clusters; UV-Photodissociation; Laser vaporization; Tandem time-of-flight mass spectrometer
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