Tag Archives: nanoparticles

Solid-state NMR supports a study on Rh nanoparticles

NHC-stabilised Rh nanoparticles: Surface study and application in the catalytic hydrogenation of aromatic substrates

F. Martinez-Espinar, P. Blondeau, P. Nolis, B. Chaudret, C. Claver, S. Castillón and C. Godard

DOI: 10.1016/j.jcat.2017.08.010

Highlights

  • Synthesis and characterisation of small RhNPs stabilised by N-heterocyclic carbenes.
  • Evidence of the location of the ligands on the faces, edges and apexes of the NPs.
  • Hydrogenation of aromatic ketones, phenols and N-heteroaromatic substrates.
  • Tuning of the selectivity as a function of the reaction conditions.
  • Full reduction of quinoline under mild conditions with total selectivity.

13C{1H} CP-MAS spectra of (a) L, (b) Rh0.4, (c) Rh0.4 + CO and (d) 13C-Rh0.4.

Novel MRI contrast agents: peptide-SPION conjugates

Journal Cover:Chem. Commun., 2012, 48, 5322-5324“Efficient γ-amino-proline-derived cell penetrating peptide-superparamagnetic iron oxide nanoparticle conjugates via aniline-catalyzed oxime chemistry as bimodal imaging nanoagents”, by Cavalli S, Carbajo D, Acosta M, Lope-Piedrafita S, Candiota AP, Arús C, Royo M, Albericio F; Chem. Commun 48 (2012) p. 5322. DOI: 10.1039/C2CC17937G

Recent advances in nanotechnology have offered new opportunities for detection, prevention, and treatment of different diseases. In this respect engineered superparamagnetic iron oxide nanoparticles (SPIONs) represent an advanced tool in nanomedicine because they can be loaded in a multiple and orthogonal way with drugs and probes in order to simultaneously act as molecular imaging agents and drug carriers. Continue reading Novel MRI contrast agents: peptide-SPION conjugates

HR-MAS: a key technique to study Nanoparticles

“Phosphine Stabilized Ruthenium Nanoparticles: the Effect of the Nature of the Ligand in Catalysis” David González-Gálvez, Pau Nolis, Karine Philippot, Bruno Chaudret and Piet W. N. M. van Leeuwen. ACS Catalysis, Volume 2, Pages 317-321, January 2012 DOI: 10.1021/cs200633k

Various ligands not forming monometallic complexes were used for Ru nanoparticle stabilization, enabling the control of size, shape and electronic properties. HRMAS NMR spectroscopy allowed us to study surface-bound molecules, evidencing ligand hydrogenation and decomposition of THF during the RuNP synthesis. Continue reading HR-MAS: a key technique to study Nanoparticles