Chirally modified gold nanoparticles: nanostructured chiral ligands for catalysis

Abstract

Preparation of novel chiral gold nanoparticles (AuNP) is described. The major advantage of nanoparticles is to combine the easy handling of solid-supported ligands and the efficiency of soluble ligands, as the molecular size of the support approaches the minimum. This is even of industrial interest, because this kind of technology offers a way of avoiding leaching of the catalyst metal in the reaction and separation of the entire catalyst using simple filtration. In this paper, we describe the attachment of a chiral soluble PyOX-ligand on a nano support via simple ligand exchange. As a result, we achieved a core smaller than ever before in experimental chemistry (1.2 ± 0.2 nm) and promising enantioselectivity in a preliminary test reaction.

Theoretical chemistry of gold. III

“…Among the most intriguing recent predictions were those of a hollow icosahedral cage structure for Au 32 at 0 K. 122,123 Experimental evidence for such a structure, with all 32 atoms on the surface, was found by Oila and Koskinen. 124 Their compound, however, had as many bridging thiolates as it had gold atoms on the surface. Thus it is quite remote from the free Au 32 .…”

Enantioselective Synthesis of Homochiral Au13 Nanoclusters and Their Chiroptical Activities

“…In contrast to the wellstudied chiral organic compounds 1 and chiral coordination polymers, 2 chirality at nanoscale 3,4 is still in its infancy, especially for gold nanoclusters, 5 despite their promising applications in the fields of chiral sensing 6 and catalysis. 7 Structural information is important for understanding the structure−property relationship, and enantiopure nanoclusters are the key for applications. Although many atomically precise chiral gold nanoclusters have been synthesized, most of them are in racemic forms in the crystal lattice.…”

Application of nanoparticles in chiral analysis and chiral separation

“…Additionally, the results of its chiral resolution can be provided instantaneously, because chiral recognition can be converted into color changes and can detect colorimetry. Some studies discussed chiral‐modified nanomaterials for catalysis, 39,40 chiral drug separation, 40 and sensing 41–43 . A different nanoparticle core has been utilized in the synthesis of chiral nanoparticles (CNPs) such as gold and silver, carbon nanotubes (CNTs), and quantum dots.…”