A 5-(difluorenyl)-1,10-phenanthroline-based Ru(II) complex as a coating agent for potential multifunctional gold nanoparticles

• Published in: Physical chemistry chemical physics : PCCP Vol. 16; no. 28; p. 14826
• Main Authors: Moreau, Juliette, Lux, François, Four, Mickaël, Olesiak-Banska, Joanna, Matczyszyn, Katarzyna, Perriat, Pascal, Frochot, Céline, Arnoux, Philippe, Tillement, Olivier, Samoc, Marek, Ponterini, Glauco, Roux, Stéphane, Lemercier, Gilles
• Format: Journal Article
• Language: English
• Published: England 28-07-2014
• Subjects: Gold - chemistry; Metal Nanoparticles - chemistry; Molecular Structure; Organometallic Compounds - chemical synthesis; Organometallic Compounds - chemistry; Particle Size; Phenanthrolines - chemistry; Ruthenium - chemistry; Surface Properties
• ISSN: 1463-9084
• DOI: 10.1039/c4cp01534g

The synthesis and photophysical properties of small gold nanoparticles (NPs, AuNP-[Ru-PFF]) surface functionalized by 5-substituted-1,10-phenanthroline-ligand based Ru(II) complexes are described. Luminescence of the grafted and confined Ru(II) complexes is totally quenched on the gold surface. Nonlinear optical properties were determined via Z-scan measurements in the range 600-1300 nm for both the free Ru(II) complex and the related NPs. In the short wavelength range (around 600 nm) the behaviour switches from that of two-photon absorption (2PA) for the complex to saturable absorption for the NPs. 2PA applications such as optical power limiting or two-photon dioxygen sensitization can be anticipated for these nanoplatforms.