A simple, green, one-pot synthesis of gold nanoparticles (AuNPs) was achieved by Kurt E. Geckeler, Gwangju Institute of Science and Technology (GIST), and Thathan Premkumar, World-Class University (WCU), Gwangju, South Korea, through the reaction of an aqueous mixture of potassium tetrachloroaurate(III) and the macrocycle cucurbituril in the presence of sodium hydroxide at room temperature without introducing any kind of traditional reducing agents and/or external energy.
The as-prepared gold nanoparticles showed catalytic activity for the reduction reaction of 4-nitrophenol in the presence of NaBH4, which has been established by visual inspection and UV/Vis spectroscopy.
Surprisingly, the macrocycle can play a dual role in the synthesis of AuNPs: as a reducing agent as well as being a protecting agent.
This report is the first for the preparation of gold nanoparticles using cucurbituril in aqueous media through chemical reduction without employing conventional reducing agents and/or external energy.
- Cucurbituril as a Tool in the Green Synthesis of Gold Nanoparticles,
Thathan Premkumar, Kurt E. Geckeler,
Chem. Asian J. 2010, 5 (12), 2468–2476.