Gold nanoparticle photosensitized radical photopolymerization.
We report the photopolymerization of an acrylic monomer using thiol-stabilized gold nanoparticles (AuNPs) and [4-[(octyloxy)phenyl] phenyl] iodonium hexafluoroantimonate (OPPI) as photoinitiator and coinitiator, respectively. Polymerization occurred only when the AuNPs, in the presence of the iodonium salt, were irradiated at the particle plasmonic absorption region (lambda>450 nm). The AuNPs activate the coinitiator by intermolecular electron transfer since OPPI has no absorption in the visible region. Fourier transform infrared spectroscopy was used to monitor polymerization. UV-Vis spectroscopy and transmission electron microscopy measurements were used to characterize the NPs.
Anyaogu
Kelechi C
KC
Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, USA.
Cai
Xichen
X
Neckers
Douglas C
DC
D006046:Gold; D007202:Indicators and Reagents; D008854:Microscopy, Electron; D036103:Nanotechnology / Q000379:methods*; D010777:Photochemistry / Q000379:methods; D017319:Photosensitizing Agents
D007202:Indicators and Reagents; D017319:Photosensitizing Agents; D006046:Gold