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Controlled Assembly Synthesis of Atomically Precise Ultrastable Silver Nanoclusters with Polyoxometalates
Kentaro Yonesato1, Hiroyasu Ito1, Hiroyuki Itakura1
1Department of Applied Chemistry, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan.
Journal of the American Chemical Society
|December 5, 2019
Summary
Researchers developed a new method to create stable silver nanoclusters using polyoxometalates (POMs). This breakthrough offers a practical way to synthesize these valuable nanomaterials for diverse applications.
Area of Science:
- Materials Science
- Nanotechnology
- Inorganic Chemistry
Background:
- Silver nanoclusters exhibit unique optical and electronic properties, driving interest in their applications.
- Limited stability and synthetic accessibility hinder the practical use of silver nanoclusters.
Purpose of the Study:
- To develop a controlled assembly strategy for fabricating atomically precise and stable silver nanoclusters.
- To utilize polyoxometalates (POMs) as both structure-directing agents and functionalizing units in nanocluster synthesis.
Main Methods:
- Employed polyoxometalates (POMs), specifically open-Dawson-type [Si2W18O66]16-, as supports for reactive nanoclusters.
- Utilized a controlled assembly strategy to synthesize atomically precise silver nanoclusters.
Main Results:
- Successfully synthesized a trefoil-propeller-shaped {Ag27}17+ nanocluster.
- The {Ag27}17+ nanocluster demonstrated 10 delocalized valence electrons and exceptional stability in solution.
- Observed unique {Ag27}-to-POM charge transfer bands in the visible light spectrum.
Conclusions:
- The developed strategy enables the fabrication of ultrastable, atomically precise silver nanoclusters.
- Polyoxometalates are effective in directing the assembly and functionalizing silver nanoclusters.
- The unique electronic and optical properties of the synthesized nanoclusters open avenues for new applications.
