Portal de Periódicos da CAPES

Ligand-Induced Stability of Gold Nanoclusters: Thiolate versus Selenolate

2012; American Chemical Society; Volume: 3; Issue: 18 Linguagem: Inglês

10.1021/jz301191t

1948-7185

Wataru Kurashige, Masaki Yamaguchi, Katsuyuki Nobusada, Yuichi Negishi,

Advanced Nanomaterials in Catalysis

Thiolate-protected gold nanoclusters have attracted considerable attention as building blocks for new functional materials and have been extensively researched. Some studies have reported that changing the ligand of these gold nanoclusters from thiolate to selenolate increases cluster stability. To confirm this, in this study, we compare the stabilities of precisely synthesized [Au25(SC8H17)18](-) and [Au25(SeC8H17)18](-) against degradation in solution, thermal dissolution, and laser fragmentation. The results demonstrate that changing the ligand from thiolate to selenolate increases cluster stability in reactions involving dissociation of the gold-ligand bond but reduces cluster stability in reactions involving intramolecular dissociation of the ligand. These results reveal that using selenolate ligands makes it possible to produce gold clusters that are more stable against degradation in solution than thiolate-protected gold nanoclusters.