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Experimental setup for enhanced 13C NMR spectroscopy in solids using dynamic nuclear polarization

โœ Scribed by R.A Wind; F.E Anthonio; M.J Duijvestijn; J Smidt; J Trommel; G.M.C de Vette


Publisher
Elsevier Science
Year
1983
Weight
714 KB
Volume
52
Category
Article
ISSN
0022-2364

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13C NMR spectroscopy in diamonds using d
โœ M.J. Duijvestijn; C. van der Lugt; J. Smidt; R.A. Wind; K.W. Zilm; D.C. Staplin ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 320 KB

In diamonds unpaired electrons associated with nitrogen impurities can be used to enhance the 13C NMR signal via the solid-state effect. 13C spectra of three natural and two synthetic diamonds are shown that were obrained in this manner in lo-30 min.

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The cis/trans conformational equilibrium of the two Ac-Pro isomers of the beta-turn model dipeptide [13C]-Ac-L-Pro-D-Ala-NHMe, 98% 13C enriched at the acetyl carbonyl atom, was investigated by the use of variable temperature gradient enhanced 1H-nmr, two-dimensional (2D) 1H,1H nuclear Overhauser eff