Probing the surface-active sites of metal nanoclusters with atomic precision: a case study of Au₅Ag₁₁

Abstract

The surface-active sites of an Au5Ag11 cluster template towards metal-/ligand-exchange reactions were unambiguously identified at the atomic level.

Parasitism in Metal Nanoclusters: A Case Study of (AuAg)25·(AuAg)27

“…This structure had a framework similar to that of the Au 5 Ag 11 -DMBT nanocluster with diverse arrangements in peripheral units due to their different phosphine ligands (Dppf versus DPPOE). 55,56 The UV−vis spectra of the two M 16 nanoclusters had some similarity: four absorption peaks at 415, 510, 550, and 695 nm were observed for the (AuAg) 16 nanocluster (Figure S9) and 410, 505, 575, and 650 nm for Au 5 Ag 11 -DMBT. An ESI-MS measurement was employed to verify the purity and composition of the obtained (AuAg) 16 nanocluster.…”

“…48 Besides, the photoluminescence (PL) spectrum of the (AuAg) 16 nanocluster displayed an obvious NIR signal centered at 839 nm (Figure S16), showing an evident red shift compared to that of Au 5 Ag 11 -DMBT reported previously (780 nm). 56 The red shift was proposed to result from the ligand effect and different surface structures of the two nanoclusters.…”

A homologous series of macrocyclic Ni clusters: synthesis, structures, and catalytic properties

“…Metal clusters have attracted extensive interest due to their precise compositions as well as their well-defined structures, which provide excellent platforms to elucidate the relationships between their structures and properties. 1–5 The last two decades have witnessed breakthroughs in the synthesis, characterization, and property exploration of group 11 transition metal (Au, Ag, Cu) clusters and their alloys; 6–17 however, the study of the metal clusters composed of group 10 transition metals (Ni, Pd, Pt) is still limited. In particular, the synthesis of core–shell structured clusters is extremely challenging; instead, cyclic polynuclear, tiara-like Ni clusters are readily available.…”

Stepwise structural evolution toward robust carboranealkynyl-protected copper nanocluster catalysts for nitrate electroreduction

“…The active centers of metal NCs play a pivotal role in catalysis, exerting a profound influence on the catalytic activity ( 16 – 19 ). Such active sites typically have geometrically open spaces for the adsorption of substrates.…”