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

J. Moreau (1) , F. Lux (2) , M. Four (1) , J. Olesiak-Banska (3) , K. Matczyszyn (3) , P. Perriat (4) , C. Frochot (5, 6) , Philippe Arnoux (5) , O. Tillement (2) , M. Samoc (3) , G. Ponterini (7) , S. Roux (8) , G. Lemercier (1, 6)

1 ICMR - Institut de Chimie Moléculaire de Reims - UMR 7312
2 ILM - Institut Lumière Matière [Villeurbanne]
3 Wroclaw University of Technology, Institute of Physical and Theoretical Chemistry
4 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
5 LRGP - Laboratoire Réactions et Génie des Procédés
6 PHOTOMED - Médicaments Photoactivables - Photochimiothérapie
7 UNIMORE - Università degli Studi di Modena e Reggio Emilia = University of Modena and Reggio Emilia
8 UTINAM - Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213)

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.

Domaines: Astrophysique [astro-ph]

J. Moreau, F. Lux, M. Four, J. Olesiak-Banska, K. Matczyszyn, et al.. A 5-(difluorenyl)-1,10-phenanthroline- based Ru( II) complex as a coating agent for potential multifunctional gold nanoparticles. Physical Chemistry Chemical Physics, 2014, 16 (28), pp.14826-14833. ⟨10.1039/C4CP01534G⟩. ⟨hal-01275448⟩