Non-aqueous solvents for DNP surface enhanced NMR spectroscopy

Alexandre Zagdoun (1) , Aaron J. Rossini (1) , David Gajan (2) , Adrien Bourdolle (3) , Olivier Ouari (4) , Mélanie Rosay (5) , Werner E. Maas (5) , Paul Tordo (4) , Moreno Lelli (1) , Lyndon Emsley (1) , Anne Lesage (1) , Christophe Copéret (2)

1 ISA - Centre de RMN à très hauts champs
2 Laboratory for Inorganic
3 C2P2 - Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265
4 LCP - Laboratoire Chimie Provence
5 Bruker BioSpin Corporation

A series of non-aqueous solvents combined with the exogenous biradical bTbK are developed for DNP NMR that yield enhancements comparable to the best available water based systems. 1,1,2,2-tetrachloroethane appears to be one of the most promising organic solvents for DNP solid-state NMR. Here this results in a reduction in experimental times by a factor of 1000. These new solvents are demonstrated with the first DNP surface enhanced NMR characterization of an organometallic complex supported on a hydrophobic surface.

Mots clés: DYNAMIC NUCLEAR-POLARIZATION

Domaines: Chimie analytique

Alexandre Zagdoun, Aaron J. Rossini, David Gajan, Adrien Bourdolle, Olivier Ouari, et al.. Non-aqueous solvents for DNP surface enhanced NMR spectroscopy. Chemical Communications, 2012, 48 (5), pp.654-656. ⟨10.1039/c1cc15242d⟩. ⟨hal-00699834⟩