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High-Yield Paste-Based Synthesis of Thiolate-Protected Silver Nanoparticles
Published in American Chemical Society
2017
Volume: 121
   
Issue: 20
Pages: 10964 - 10970
Abstract
Nanoparticles rival pharmaceuticals in synthetic inefficiency, in particular as measured by process mass intensity, with by far the largest contribution to waste being from solvents. We have therefore developed a greener method of synthesizing silver nanoparticles using a paste format instead of a metal salt solution. The paste-based synthesis requires 87% less solvent yet still produces exclusively Na4Ag44(p-MBA)30 nanoparticles, without size sorting, with 89% yield. By using a stoichiometric silver-thiolate polymer as a precursor to intimately mix the metal atoms and ligands, and by using a small amount of liquid to form a paste to promote mass transport, the heterogeneity and kinetics problems that are associated with entirely solid-state syntheses were avoided. Because the nanoparticle product was also a paste, solvent use for postprocessing was minimized. Use of the silver-thiolate polymer can also reduce health risks associated with hazardous free thiols in conventional solution-phase syntheses. Using this strategy, the process mass intensity was reduced from ∼1800 for the solution-phase reaction to ∼200 and ∼100 for the paste-based reaction with and without protonation of the ligands, respectively. © 2017 American Chemical Society.
About the journal
JournalData powered by TypesetJournal of Physical Chemistry C
PublisherData powered by TypesetAmerican Chemical Society
ISSN19327447
Open AccessNo
Concepts (15)
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    Health risks
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    Ligands
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    Metal nanoparticles
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    Nanoparticles
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    Solvents
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    Synthesis (chemical)
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    High yield
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    METAL ATOMS
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    METAL SALT SOLUTION
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    Silver nanoparticles
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    SIZE-SORTING
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    SOLID-STATE SYNTHESIS
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    Solution phase
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    Solution phase synthesis
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    Silver