Friday, July 28, 2006

Phys. Chem. Chem. Phys., 2006, 8, 3552 - 3556

Reactions of alkyl-radicals with gold and silver nanoparticles in aqueous solutions

Tomer Zidki, Haim Cohen and Dan Meyerstein

Comment: This paper doen not have NMR in it.

Silver and gold nanoparticles are very efficient catalysts for the dimerization of methyl-radicals in aqueous solutions. The rate constants for the reaction of methyl-radicals with the gold and silver nanoparticles were measured and found to be 3.7 × 108 M–1 s–1 and 1.4 × 109 M–1 s–1, respectively. The results thus suggest that alkyl-radicals, also not reducing ones, are scavenged by these nanoparticles. This might explain the role, if such a role exists, of these nanoparticles in medical applications.

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