Precise localization of metal nanoparticles in dendrimer nanosnakes or inner periphery and consequences in catalysis

Understanding the relationship between the location of nanoparticles (NPs) in an organic matrix and their catalytic performances is essential for catalyst design. Here we show that catalytic activities of Au, Ag and CuNPs stabilized by dendrimers using coordination to intradendritic triazoles, galva...

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Bibliographic Details
Published in:Nature communications 2016-10, Vol.7 (1), p.13152-13152, Article 13152
Main Authors: Liu, Xiang, Gregurec, Danijela, Irigoyen, Joseba, Martinez, Angel, Moya, Sergio, Ciganda, Roberto, Hermange, Philippe, Ruiz, Jaime, Astruc, Didier
Format: Article
Language:English
Subjects:
140/146
639/301/923/1028
639/638/549/2263
639/638/77
Catalysis
Chemical Sciences
Humanities and Social Sciences
Ligands
Localization
multidisciplinary
Nanoparticles
Science
Science (multidisciplinary)
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Summary:Understanding the relationship between the location of nanoparticles (NPs) in an organic matrix and their catalytic performances is essential for catalyst design. Here we show that catalytic activities of Au, Ag and CuNPs stabilized by dendrimers using coordination to intradendritic triazoles, galvanic replacement or stabilization outside dendrimers strongly depends on their location. AgNPs are found at the inner click dendrimer periphery, whereas CuNPs and AuNPs are encapsulated in click dendrimer nanosnakes. AuNPs and AgNPs formed by galvanic replacement are larger than precursors and only partly encapsulated. AuNPs are all the better 4-nitrophenol reduction catalysts as they are less sterically inhibited by the dendrimer interior, whereas on the contrary CuNPs are all the better alkyne azide cycloaddition catalysts as they are better protected from aerobic oxidation inside dendrimers. This work highlights the role of the location in macromolecules on the catalytic efficiency of metal nanoparticles and rationalizes optimization in catalyst engineering. Organic supports are often employed for encapsulation of metal nanoparticles. Here the authors report a method for the precise localisation of gold, silver and copper nanoparticles within a dendrimer support and show how this localisation influences catalytic performance.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms13152