Site-specific doping of silver atoms into a Au₂₅ nanocluster as directed by ligand binding preferences

Abstract

For the first time site-specified doping of silver into a spherical Au25 nanocluster has been achieved in [Au19Ag6(MeOPhS)17(PPh3)6] (BF4)2 (Au19Ag6) through a dual-ligand coordination strategy. Single crystal X-ray structural analysis...

Alloying and dealloying of Au18Cu32nanoclusters at precise locationsviacontrolling the electronegativity of substituent groups on thiol ligands

“…39–47 For example, in the synthesis of Au–Ag alloy clusters using mixed ligands (phosphorus and halogen ligands), Au preferentially connects to P while Ag preferentially bonds to the halogen owing to the difference in binding energies. 15,23,48–53 However, this strategy did not work in homologated clusters. The ability to precisely control the doping position in homologated nanoclusters is challenging as well as extremely important for studying the structure–activity relationship.…”

Electron transport through supercrystals of atomically precise gold nanoclusters: a thermal bi-stability effect

“…8,9 It has long been a major dream to obtain atomically precise NPs and assemble them into atomically coherent superlattices for achieving versatile functionalities. 5,6,10 Recent advances in nanochemistry [11][12][13][14][15][16][17] have offered access to gold NPs with atomically precise cores and denitive numbers of surface ligands (e.g., thiolate -SR or phosphine PPh 3 ), 10,16,17 which are represented by exact formulae (e.g., Au n (SR) m for thiolate-protected NPs), akin to molecules. [18][19][20][21] Such ultrasmall NPs (1-3 nm core diameter) are oen called nanoclusters (NCs).…”

Controlled Sequential Doping of Metal Nanocluster

“…The recently emerging metal nanoclusters (ultrasmall nanoparticles) provide excellent opportunities for atomically precise doping, and it has attracted increasing interest since the pioneering works on Au 24 Pd by Murray’s and Negishi’s groups . Until now, single − and multiple − heterometal atom-doped NCs have been successfully synthesized with atomic precision. The structure and property evolution with the single-to-multiple metal atom doping of metal NCs is fascinating.…”