The Synthesis, Bonding, and Transformation of a Ligand‐Protected Gold Nanohydride Cluster
| Autor: | Ze-Hua Gao, Qian-Fan Zhang, Lai-Sheng Wang, Jia Dong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Gold cluster
Materials science 010405 organic chemistry Chemistry Hydride Ligand Superatom Hydrogen transfer General Chemistry General Medicine 010402 general chemistry 01 natural sciences Quadruple bond Catalysis 0104 chemical sciences Delocalized electron Transformation (genetics) Crystallography Chemical bond Cluster (physics) |
| Zdroj: | Angewandte Chemie. 133:2454-2460 |
| ISSN: | 1521-3757 0044-8249 |
| DOI: | 10.1002/ange.202011748 |
| Popis: | Gold does not react with H2 to form bulk hydrides. Here we report the synthesis and characterization of a gold nanohydride protected by diphosphine ligands, [Au22 H4 (dppo)6 ]2+ [dppo=1,8-bis(diphenylphosphino)octane]. The Au22 core consists of two Au11 units bonded by eight Au atoms not coordinated by the diphosphine ligands. The four H atoms are found to bridge the eight uncoordinated Au atoms at the interface. Each Au11 unit can be viewed as a tetravalent superatom forming four delocalized Au-H-Au bonds, similar to the quadruple bond first discovered in the [Re2 Cl8 ]2- inorganic cluster. The [Au22 H4 (dppo)6 ]2+ nanohydride is found to lose H atoms over an extended time via H evolution (H2 ), proton (H+ ) and hydride (H- ) releases. This complete repertoire of H-related transformations suggests that the [Au22 H4 (dppo)6 ]2+ nanohydride is a versatile model catalyst for understanding the mechanisms of chemical reactions involving hydrogen on the surface of gold nanoparticles. |
| Databáze: | OpenAIRE |
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