PVP-Stabilized Copper Nanoparticles: A Reusable Catalyst for 'Click' Reaction between Terminal Alkynes and Azides in Nonaqueous Solvents
| Autor: | and T. Mukherjee, Sudhir Kapoor, Asit R. Sarkar |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Formamide
Reducing agent Inorganic chemistry chemistry.chemical_element Nanoparticle Ascorbic acid Copper Nanomaterial-based catalyst Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis chemistry.chemical_compound General Energy chemistry Physical and Theoretical Chemistry Hydrate Nuclear chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 112:3334-3340 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp077603i |
| Popis: | Highly stable poly(N-vinyl-2-pyrrolidone) (PVP) protected copper nanoparticles were prepared using a simple chemical reduction route in different solvents {N, N-dimethyl formamide (DMF) and formamide (FA)} under aerated condition. The particles were characterized using TEM, SEM, XRD, and UV−visible spectroscopic techniques. Copper nanostructures of varying shapes and sizes were obtained using hydrazine hydrate as the reducing agent in both DMF and FA. However, reducing by ascorbic acid in FA leads to formation of mostly spherical copper nanoparticles with a narrow size distribution. The Cu nanoparticles serve as effective catalyst for 1,3-dipolar cycloaddition reactions between terminal alkynes and azides to synthesize 1,2,3-triazoles in excellent yields under mild reaction conditions. The nanocatalysts can be recycled and reused several times without significant loss of their catalytic activity. |
| Databáze: | OpenAIRE |
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