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Prompt in Situ Emission of Gold Adducts from Single Impacts of Large Gold Clusters on Organics Solids by C. Guillermier; S. Della Negra; R.D. Rickman; G.J. Hager; E.A. Schweikert is a Chemistry article available to read on EtoBox.

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We report the first observation of single impacts of 136 keV Au n 4+ (100 ≤ n ≤ 400) on organic solids, generating prolific emission of Au and Au 2 -containing fragments and molecular ions. We show that the individual impacting cluster is both the source of energy stimulating the emission, and the donor of atoms for adducts synthesis. The emission of Au and Au 2 was observed when n ≥ 100. The most abundant species is Au(CN) 2 -. The adduct yields behave as follows when the projectile size varies from n = 100 to 400: (a) they increase with n; (b) the dependence with n for the formation of Au(CN) 2 -differs from those for more complex species suggesting different pathways of synthesis; (c) the combined yields of the Au or the Au 2 -adducts are the same for different targets. There is evidence that the projectiles were implanted virtually intact in the organic targets, thus, the adduct synthesis involves a small number of Au atoms ablated from the projectile, which implies extensive ionization of the detached atoms. The abundance of three-body assemblies, e.g. Au(CN) 2 -, Au(CN) (M-H) -, suggests that the adduct formation occurs likely in a dense phase.

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Author

C. Guillermier; S. Della Negra; R.D. Rickman; G.J. Hager; E.A. Schweikert

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1387-3806)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)