project presentation (pdf file)

Project in Surface Enhanced
NMR Spectroscopy
European Center for High-Field NMR in Lyon
Institut des Sciences Analytiques
Sn Chemical
Shift (ppm)
Developing Advanced Instrumentation and Experimental
Methods for Surface Enhanced NMR Spectroscopy
and Applications to Catalysis
European Large Scale
Facility For NMR
World’s second 800 MHz DNP
NMR spectrometer
World Leaders in the
Development of NMR
Project: The Achille’s heel of NMR spectroscopy is the low
sensitivity of the method, which restricts its use to concentrated
samples. Notably surfaces were previously inaccessible to NMR.
Our group has recently shown that by transferring polarization
from electrons to nuclei NMR signals from surfaces can be observed
with high sensitivity, opening up an entirely new form of
spectroscopy: Surface Enhanced NMR Spectroscopy (SENS). The
aim of the project is to develop SENS to provide a robust tool for
the characterization of surface species in complex samples,
including heterogeneous catalysts. We will address the key fundamental issues preventing widespread use of SENS through either (i)
experimental studies of catalytically relevant surfaces; (ii) developing
new models and electron sources to optimize the electron-nuclear
polarization transfer process in highly reactive catalytic systems; or
(iii) developing new NMR experiments that control spin dynamics
to provide higher surface signal enhancements.
Wolf, P. et al, NMR Signatures of the Active Sites in Sn-Β Zeolite. Angew. Chem. Int. Ed. 2014, 53, 10179–10183.
Rossini, A. J. et al, Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy. Acc. Chem. Res. 2013, 46, 1942–1951.
Samantaray, M. K.; et al. Evidence for Metal–Surface Interactions and Their Role in Stabilizing Well-Defined Immobilized Ru–NHC Alkene Metathesis
Catalysts. J. Am. Chem. Soc. 2013, 135, 3193–3199.
Supervisor and contact information
Dr. Anne Lesage, Professor Lyndon Emsley
Email: [email protected]
[email protected]
Centre de RMN à Très Hauts Champs de Lyon
Institut de Sciences Analytiques
UMR 5280 CNRS / ENS Lyon / UCB Lyon 1
5 rue de la Doua, 69100 Villeurbanne, France