Collision‐induced dissociation of Fen+ (n=2–19) with Xe: Bond energies, geometric structures, and dissociation pathways

来自 Semantic Scholar

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阅读量：

100

作者：

L Lian，C.. Su，PB Armentrout

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摘要：

The kinetic energy dependence of the collision‐induced dissociation (CID) of Fe+n(n=11–19) with Xe is studied by using a guided ion beam mass spectrometer. As previously reported for smaller iron cluster ions, these iron cluster ions dissociate exclusively by evaporation, the sequential loss of Fe atoms. Bond energies for the larger iron cluster ionsD0(Fe+n−1–Fe),n=11–19, as well as updated values for the smaller cluster ions,n=2–10, are reported. These energies are derived after explicit consideration of the effect of secondary collisions between Fe+nand Xe, and of the lifetimes of the energized iron cluster ions. Bond energies for neutral iron clusters are derived by combining these ionic bond energies with literature ionization energies for Fen. Except for the dimers, we find that the bond energies of ionic and neutral iron clusters are very similar and change nonmonotonically as a function of cluster size, with local maxima atn=6, 7, 13, 15, and 19; and local minima atn=8, 14, and 18. Evidence for the existence of weakly bound isomers of iron cluster ions is also observed.

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关键词：

Cluster reactivity Dissociation Dissociation energies Vanadium Chemical bonds

DOI：

10.1063/1.463912

被引量：

461

年份：

1992