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Gold Nanoparticles Stabilized by Glycodendrimers: Synthesis and Application to the Catalytic Reduction of 4‐Nitrophenol
Author(s) -
Gatard Sylvain,
Salmon Lionel,
Deraedt Christophe,
Ruiz Jaime,
Astruc Didier,
Bouquillon Sandrine
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402067
Subject(s) - chemistry , 4 nitrophenol , catalysis , transmission electron microscopy , reducing agent , colloidal gold , nanoparticle , selective catalytic reduction , spectroscopy , ultraviolet visible spectroscopy , reaction rate constant , nuclear chemistry , combinatorial chemistry , chemical engineering , organic chemistry , kinetics , engineering , physics , quantum mechanics
Air‐stable gold nanoparticles stabilized by glycodendrimers (AuDSNs) in water were prepared in the presence of a reducing agent, NaBH 4 . A UV/Vis spectroscopy study demonstrates that no spontaneous reduction of Au 3+ ions occurs in the presence of glycodendrimers. The AuDSNs were characterized by UV/Vis spectroscopy and transmission electron microscopy (TEM). TEM images show that the AuDSNs were very small (average diameter: 2.6 nm). The catalytic activity of these AuDSNs was evaluated for the reduction of 4‐nitrophenol (4‐NP) to 4‐aminophenol (4‐AP) by NaBH 4 monitored by UV/Vis spectroscopy. Studies of the reduction reaction reveal that the rate constant depends on the concentration of 4‐NP.