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Highly Efficient, Water‐Soluble Polarizing Agents for Dynamic Nuclear Polarization at High Frequency
Author(s) -
Sauvée Claire,
Rosay Melanie,
Casano Gilles,
Aussenac Fabien,
Weber Ralph T.,
Ouari Olivier,
Tordo Paul
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201304657
Subject(s) - polarization (electrochemistry) , spectroscopy , content delivery , computer science , nuclear magnetic resonance spectroscopy , materials science , world wide web , chemistry , physics , nuclear magnetic resonance , computer network , quantum mechanics
Well polarized : Two new polarizing agents PyPol and AMUPol soluble in glycerol/water mixtures are used for dynamic nuclear polarization (DNP) NMR spectroscopy. The enhancement factors ( ε ) are about 3.5 to 4 times larger than for the established agent TOTAPOL at 263 and 395 GHz. For AMUPol, the temperature dependence of ε allows DNP experiments to be performed at temperatures significantly higher than for typical high‐field DNP NMR experiments.