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Biicosahedral Gold Clusters [Au<sub>25</sub>(PPh<sub>3</sub>)<sub>10</sub>(SC<i><sub>n</sub></i>H<sub>2</sub><i><sub>n</sub></i><sub>+1</sub>)<sub>5</sub>Cl<sub>2</sub>]<sup>2+</sup> (<i>n</i> = 2−18): A Stepping Stone to Cluster-Assembled Materials
401
Citations
23
References
2007
Year
EngineeringNanoclusterMetal NanoparticlesChemistryOptical Absorption SpectroscopyNanostructure SynthesisMaterials ScienceInorganic ChemistryCluster ScienceAu13 Building BlocksNanotechnologyCluster-assembled MaterialsCrystallographyCrystal Structure DesignNanomaterialsSelf-assemblyApplied PhysicsCluster ChemistryMain Group ChemistryAu25 Core
The chemical reaction between [Au11(PPh3)8Cl2]+ and n-alkanethiol CnH2n+1SH (n = 2, 8, 10, 12, 14, 16, and 18) serendipitously yielded stable Au25 cluster compounds with the formula, [Au25(PPh3)10(SCnH2n+1)5Cl2]2+. Single-crystal X-ray structural analysis of [Au25(PPh3)10(SC2H5)5Cl2](SbF6)2 revealed that the Au25 core is constructed by bridging two icosahedral Au13 clusters with thiolates sharing a vertex atom. Optical absorption spectroscopy showed that coupling between the Au13 building blocks gives rise to new electronic levels in addition to those of the Au13 constituents.
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