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Narouz, Mina R; Osten, Kimberly M; Unsworth, Phillip J; Man, Renee W Y; Salorinne, Kirsi; Takano, Shinjiro; Tomihara, Ryohei; Kaappa, Sami; Malola, Sami; Dinh, Cao-Thang; Padmos, J Daniel; Ayoo, Kennedy; Garrett, Patrick J; Nambo, Masakazu; Horton, J Hugh; Sargent, Edward H; Häkkinen, Hannu; Tsukuda, Tatsuya; Crudden, Cathleen M
Nature chemistry, 05/2019, Letnik: 11, Številka: 5Journal Article
Magic-number gold nanoclusters are atomically precise nanomaterials that have enabled unprecedented insight into structure-property relationships in nanoscience. Thiolates are the most common ligand, binding to the cluster via a staple motif in which only central gold atoms are in the metallic state. The lack of other strongly bound ligands for nanoclusters with different bonding modes has been a significant limitation in the field. Here, we report a previously unknown ligand for gold(0) nanoclusters-N-heterocyclic carbenes (NHCs)-which feature a robust metal-carbon single bond and impart high stability to the corresponding gold cluster. The addition of a single NHC to gold nanoclusters results in significantly improved stability and catalytic properties in the electrocatalytic reduction of CO . By varying the conditions, nature and number of equivalents of the NHC, predominantly or exclusively monosubstituted NHC-functionalized clusters result. Clusters can also be obtained with up to five NHCs, as a mixture of species.
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