Abstract
Here we report on the biomimetic synthesis of Pd nanoparticles for use as models of green catalytic systems. The nanomaterials are synthesized using peptides isolated via phage-display techniques that are specific to Pd surfaces. Using this synthetic strategy, peptide-functionalized Pd nanoparticles of 1.9-0.3 nm in diameter are produced, which are soluble and stable in aqueous solutions. Once characterized, these biobased materials were then used as catalysts to drive the formation of C-C bonds using the Stille coupling reaction. Under the conditions of an aqueous solvent at room temperature, quantitative product yields were achieved within 24.0 h employing catalyst loadings of>0.005 mol % of Pd. Additionally, high TOF values of 3207-269 mol product . (mol Pd . h) -1 have been determined for these materials. The catalytic reactivity was then examined over a set of substrates with substitutions for both functional group and halide substituents, demonstrating that the peptide-based Pd nanoparticles are reactive toward a variety of functionalities. Taken together, these bioinspired materials represent unique model systems for catalytic studies to elucidate ecologically friendly reactive species and conditions.
Original language | English (US) |
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Pages (from-to) | 1288-1296 |
Number of pages | 9 |
Journal | ACS Nano |
Volume | 3 |
Issue number | 5 |
DOIs | |
State | Published - May 26 2009 |
Externally published | Yes |
Keywords
- Bioinspired nanotechnology
- Catalysis
- Pd nanoparticles
- Peptides
- Stille coupling
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)
- Physics and Astronomy(all)