Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 25, Issue 64, Pages 14638-14643Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201903076
Keywords
core-shell systems; nanoparticles; photochemistry; radicals
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Funding
- Marie Curie Program (FP7-PEOPLE-ITN-2013) [CYCLON-HIT 608407]
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A simple and green synthetic protocol for the rapid and effective preparation of Ag, Au and Au@Ag core-shell nanoparticles (NPs) is reported based on the light irradiation of a biocompatible, water-soluble dextran functionalized with benzophenone (BP) in the presence of AgNO3, HAuCl4, or both. Photoactivation of the BP moiety produces the highly reducing ketyl radicals through fast (<50 ns) intramolecular H-abstraction from the dextran scaffold, which, in turn, ensures excellent dispersibility of the obtained metal NPs in water. The antibacterial activity of the AgNPs and the photothermal action of the Au@Ag core-shell are also shown.
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