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Dynamic Nuclear Polarization with a Rigid Biradical
Author(s) -
Matsuki Yoh,
Maly Thorsten,
Ouari Olivier,
Karoui Hakim,
Le Moigne François,
Rizzato Egon,
Lyubenova Sevdalina,
Herzfeld Judith,
Prisner Thomas,
Tordo Paul,
Griffin Robert G.
Publication year - 2009
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.200805940
Subject(s) - polarization (electrochemistry) , chemistry , nuclear magnetic resonance , physics
Abstract A new polarizing agent with superior performance in dynamic nuclear polarization experiments is introduced, and utilizes two TEMPO (2,2,6,6‐tetramethylpiperidine‐1‐oxyl) moieties connected through a rigid spiro tether (see structure). The observed NMR signal intensities were enhanced by a factor of 1.4 compared to those of TOTAPOL, a previously described TEMPO‐based biradical with a flexible tether.