Title :

Mutual influence of gold and silver nanoparticles on Tris-(2,2 '''' bipyridine)-Ru (II) core complexes: Post-functionalization processes, optical and electrochemical investigations

Author(s) :

Dumur, F. [Auteur]
Institut de Chimie Radicalaire [ICR]
Guerlin, A. [Auteur]
Lehoux, A. [Auteur]
Institut Lavoisier de Versailles [ILV]
Selvakannan, P. R. [Auteur]
Miomandre, F. [Auteur]
Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Meallet-Renault, R. [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Rebarz, M. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Sliwa, Michel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Dumas, E. [Auteur]
Le Pleux, L. [Auteur]
Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation [CEISAM]
Pellegrin, Y. [Auteur]
Odobel, F. [Auteur]
Mayer, C. R. [Auteur]

Journal title :

Applied Surface Science

Abbreviated title :

Appl. Surf. Sci.

Volume number :

499

Publication date :

2019-12-28

ISSN :

0169-4332

English keyword(s) :

Polypyridyl ruthenium complexes
Ag
Au
Nanoparticles
Spectroscopies
Electrochemistry

HAL domain(s) :

Chimie/Chimie théorique et/ou physique

English abstract : [en]

The synthesis, reactivity and properties of a series of four polypyridyl ruthenium complexes have been studied. These complexes were used to post-functionalize preformed 3 nm silver and gold nanoparticles (NPs) in water ...
Show more >The synthesis, reactivity and properties of a series of four polypyridyl ruthenium complexes have been studied. These complexes were used to post-functionalize preformed 3 nm silver and gold nanoparticles (NPs) in water and in dichloromethane (DCM). We studied the influence of the grafted complexes on the formation process and stability of the colloidal solutions and we investigated the optical and electrochemical properties of the final nanocomposites. Among the series of four ruthenium complexes, three novel heteroleptic complexes (1–3) bearing one pyridine, one amine or two carboxydithioic acid pendant groups were synthesized and reacted with preformed Au-NPs and Ag-NPs. Results were compared to those obtained with the model [Ru(bpy)3]2+ complex (4). The strength of the interaction between the anchoring group and the surface of NPs influenced the size, shape and stability of the final nanocomposites. Polar solvent such as water induced aggregation and lead to unstable nanocomposites. Stationary and time resolved luminescence of grafted nanocomposites (1–3) showed that the luminescence of complexes were completely quenched (lifetime and emission quantum yield) in water by electron transfer processes, moreover electrical measurements rationalize that Ag nanocomposites exhibit the stronger quenching due to a lower oxidation potential. It also showed a current enhancement associated with double layer charging of the metal nanoparticle cores.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Submission date :

2024-02-28T23:17:40Z
2024-03-11T09:32:12Z