Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 277, Issue -, Pages 149-153Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2017.02.016
Keywords
Solid-state NMR; DNP; Solvent suppression; Paramagnetic relaxation enhancement (PRE); Relaxation filters
Funding
- ERC [320860]
- Swiss National Science Foundation [200021_160112]
- Swiss National Science Foundation (SNF) [200021_160112] Funding Source: Swiss National Science Foundation (SNF)
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We show how DNP enhanced solid-state NMR spectra can be dramatically simplified by suppression of solvent signals. This is achieved by (i) exploiting the paramagnetic relaxation enhancement of solvent signals relative to materials substrates, or (ii) by using short cross-polarization contact times to transfer hyperpolarization to only directly bonded carbon-13 nuclei in frozen solutions. The methods are evaluated for organic microcrystals, surfaces and frozen solutions. We show how this allows for the acquisition of high-resolution DNP enhanced proton-proton correlation experiments to measure inter-nuclear proximities in an organic solid. (C) 2017 The Author(s). Published by Elsevier Inc.
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