6533b870fe1ef96bd12cf148
RESEARCH PRODUCT
Total Structure and Electronic Structure Analysis of Doped Thiolated Silver [MAg24(SR)18]2– (M = Pd, Pt) Clusters
Shui-chao LinHannu HäkkinenNanfeng ZhengHai-feng SuJuanzhu YanSami MalolaHuayan Yangsubject
ta114ChemistryStereochemistryDopingAb initioGeneral ChemistryElectronic structureengineering.materialpalladiumBiochemistryCatalysissilver nanoclustersNanoclustersCatalysisOverlayerCrystallographyColloid and Surface ChemistryengineeringNoble metalplatinumChirality (chemistry)ta116thiolsdescription
With the incorporation of Pd or Pt atoms, thiolated Ag-rich 25-metal-atom nanoclusters were successfully prepared and structurally characterized for the first time. With a composition of [PdAg24(SR)18](2-) or [PtAg24(SR)18](2-), the obtained 25-metal-atom nanoclusters have a metal framework structure similar to that of widely investigated Au25(SR)18. In both clusters, a M@Ag12 (M = Pd, Pt) core is capped by six distorted dimeric -RS-Ag-SR-Ag-SR- units. However, the silver-thiolate overlayer gives rise to a geometric chirality at variance to Au25(SR)18. The effect of doping on the electronic structure was studied through measured optical absorption spectra and ab initio analysis. This work demonstrates that modulating electronic structures by transition-metal doping is expected to provide effective means to manipulate electronic, optical, chemical, and catalytic properties of thiolated noble metal nanoclusters.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-10 | Journal of the American Chemical Society |