Monitoring the coordination of amine ligands on silver nanoparticles using NMR and SERS

Jérémy Cure (1) , Yannick Coppel (2) , Thameur Dammak (3) , Pier-Francesco Fazzini (4) , Adnen Mlayah (5) , Bruno Chaudret (4) , Pierre Fau (2)

1 ST-TOURS - STMicroelectronics [Tours]
2 LCC - Laboratoire de chimie de coordination
3 Université de Sfax - University of Sfax
4 LPCNO - Laboratoire de physique et chimie des nano-objets
5 CEMES-NeO - Nano-Optique et Nanomatériaux pour l'optique

Low size dispersity silver nanoparticles (ca. 6 nm) have been synthesized by the hydrogenolysis of silver amidinate in the presence of hexadecylamine. Combining NMR techniques with SERS and DFT modeling, it is possible to observe an original stabilization mechanism. Amidine moiety is strongly coordinated to the Ag0 nanoparticles surface whereas HDA ligand is necessary to prevent agglomeration, although it is only weakly interacting with the surface.

Mots clés: Amidinates; Amine ligand; Nanoparticles; Ligands; Silver nanoparticles; Stabilization mechanisms; NMR techniques; Hexadecylamine; DFT modeling; Dispersity; Silver

Domaines: Physique [physics]

Jérémy Cure, Yannick Coppel, Thameur Dammak, Pier-Francesco Fazzini, Adnen Mlayah, et al.. Monitoring the coordination of amine ligands on silver nanoparticles using NMR and SERS. Langmuir, 2015, 31 (4), pp.1362-1367. ⟨10.1021/la504715f⟩. ⟨hal-01764991⟩