Thermally responsive gold nanocatalysts based on a modified poly-vinylpyrrolidone

Zhang, Jiaguang, Yuan, Yuan, Kilpin, Kelly J. , Kou, Yuan, Dyson, Paul J. and Yan, Ning (2013) Thermally responsive gold nanocatalysts based on a modified poly-vinylpyrrolidone. Journal of Molecular Catalysis A: Chemical, 371 . pp. 29-35. ISSN 1381-1169

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Poly-vinylpyrrolidone (PVP) stabilized nanoparticle (NP) catalysts are among the most active NP catalysts demonstrating excellent activities and stabilities in a wide and diverse range of reactions. One of the main limitations, that tend to prevent their use in industrial processes, is that they cannot be easily separated from reactions that are not amenable to biphasic separations, i.e. those involving hydrophilic reaction products. We describe a durable and recyclable Au NP catalyst system based on modified PVP that is thermo-sensitive, termed C1-PVP. C1-PVP stabilized Au NPs are similar in size, and exhibit similar properties, to Au NPs stabilized by PVP, but their additional thermo-sensitivity enables their facile separation from hydrophilic reaction products by mild heating, resulting in their precipitation. XRD, XPS, TEM, temperature dependant NMR, DLS and UV–vis analysis, as well as catalytic recycling and metal leaching tests were carried out to fully characterize the thermo-sensitive behavior of C1-PVP stabilized Au NPs. The C1-PVP stabilized Au NPs were systematically compared to Au NPs stabilized by PVP demonstrating the superiority of the new system and their potential green benefits.

Additional Information:The final published version of this article can be accessed online at
Keywords:Thermo-sensitive, C1-PVP, Nanoparticle, Recyclable, Polymers
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:30572
Deposited On:13 Aug 2018 13:18

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