Preparation of very reactive thiol-protected gold nanoparticles: revisiting the Brust-Schiffrin method.
The preparation and properties of tert-dodecanethiol protected gold nanoparticles amenable to very rapid surface functionalization by associative mechanism is described. The new material can be easily prepared by controlling the reaction time, because only a limited but enough number of tert-dodecanethiol to stabilize the gold clusters is bond to the surface until about an hour. Accordingly, it can be isolated as a solid and handled much like the highly stabilized Brust-Schiffrin analogues, but reacted very rapidly with any molecular species containing one or multiple functional groups such as thiol, disulfide, pyridine, etc. These characteristics are ideal for the preparation of a variety of new organic-inorganic hybrid nanomaterials by coordinative self-assembly. This possibility was illustrated using meso-tetra(4-pyridyl)porphyrin, which promptly bonded to the reactive protected gold nanoparticles generating a solid that can be grown as thin films with layer-by-layer control on a suitably modified surface.
Araki
Koiti
K
Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, National Institutes of Natural Science, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan.
Mizuguchi
Eisuke
E
Tanaka
Hirofumi
H
Ogawa
Takuji
T
D000327:Adsorption; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013499:Surface Properties
D020099:Coated Materials, Biocompatible; D013438:Sulfhydryl Compounds; D006046:Gold