Dynamic Nuclear Polarization with a Rigid Biradical
Open Access
- 17 June 2009
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 48 (27), 4996-5000
- https://doi.org/10.1002/anie.200805940
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.Keywords
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