Reactivity of Silver Clusters Anions with Ethanethiol
| Autor: | Zhixun Luo, Meiye Jia, Gabriel U. Gamboa, A. W. Castleman, Shiv N. Khanna, Arthur C. Reber |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | The Journal of Physical Chemistry A. 118:8345-8350 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/jp501164g |
| Popis: | We have investigated the gas-phase reactivity of silver clusters with ethanethiol in a fast-flow tube reactor. The primary cluster products observed in this reaction are AgnSH(-) and AgnSH2(-), indicating C-S bond activation, together with interesting byproducts H3S(-) and (H3S)2(-). Agn(-) clusters with an odd number of valence electrons (n = even) were observed to be more reactive than those with an even number of electrons-a feature previously only observed in the reactivity of Agn(-) with triplet oxygen, indicating that radical active sites play a role in their reactivity. Furthermore, the reactivity dramatically increases with large flow rate of ethanethiol being introduced in the flow tube. Theoretical investigations on the reactivity of Ag13(-) and Ag8(-) with ethanethiol indicate that both Ag13(-) and Ag8(-) face significant barriers to reactivity with a single ethanethiol molecule. However, Ag8(-) reacts readily in a cooperative reaction with two ethanethiol molecules, consistent with the dramatic increase in reactivity with a large flow rate. Further hydrogen-transfer reactions may then release an ethylene molecule or an ethyl radical resulting in the observed AgnSH(-) species. |
| Databáze: | OpenAIRE |
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