The effect of ligand denticity in size-selective synthesis of calix[n]arene-stabilized gold nanoparticles: a multitechnique approach.
A series of gold nanoparticles (AuNPs) stabilized by monodentate, bidentate, and tridentate thiolate calix[n]arene ligands 1-3 was prepared by using the Brust-Schiffrin two-phase direct synthesis and characterized with NMR spectroscopy, elemental analysis, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The experimental data show that the particular multidentate structure of calix[n]arene derivatives 2 and 3 introduces a control element in the preparation of the gold nanoparticles that allows, in the particular experimental conditions here reported, to obtain very small (≈1 nm) AuNPs. These are the first experimental findings that identify a role of ligand "denticity" in the determination of the nuclearity of nanoparticles.
Pescatori
Luca
L
Dipartimento di Chimica Organica e Industriale and Unità INSTM Sez. 4-UdR Parma, Università di Parma, viale Usberti 17/a, 43124 Parma, Italy.
Boccia
Alice
A
Ciesa
Flavio
F
Rossi
Francesca
F
Grillo
Vincenzo
V
Arduini
Arturo
A
Pochini
Andrea
A
Zanoni
Robertino
R
Secchi
Andrea
A