The Effect of Glassing Solvent Deuteration and Gd³⁺ Doping on ¹³C DNP at 5 T

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The Effect of Glassing Solvent Deuteration and Gd³⁺ Doping on ¹³C DNP at 5 T

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Title: The Effect of Glassing Solvent Deuteration and Gd³⁺ Doping on ¹³C DNP at 5 T
Author(s):
Kiswandhi, Andhika (UT Dallas);
Lama, Bimala (UT Dallas);
Niedbalski, Peter (UT Dallas);
Goderya, Mudrekh (UT Dallas);
Long, J.;
Lumata, Lloyd L.(UT Dallas)
Date Created: 2016-04-14
Item Type: article
Keywords: Show Keywords
Abstract: We report the influence of glassing solvent deuteration and Gd³⁺ doping on ¹³C dynamic nuclear polarization (DNP) nuclear magnetic resonance (NMR) performed on [1-¹³C] sodium acetate at B₀ = 5 T and 1.2 K. Our data reveal that at 5 T, glassing solvent deuteration still results in a 40% improvement of the ¹³C DNP signal when a large electron spin resonance (ESR) linewidth 4-oxo-TEMPO free radical is used, but results in a 60% decrease of the DNP signal in the case of a sample doped with small ESR linewidth trityl OX063. An addition of a trace amount of the Gd³⁺ complex Gd-HP-DO3A led to a negligible slight decrease on the ¹³C polarization TEMPO-doped sample, but is still relatively beneficial for the trityl-doped sample with 30% improvement of the DNP-enhanced ¹³C polarization. These findings indicate that while these DNP optimization steps are still valid at 5 T, the effects are not as pronounced as observed in ¹³C DNP at B₀ = 3.35 T. These DNP results at 5 T are discussed thermodynamically within the framework of the thermal mixing model of DNP.
Publisher: Royal Society of Chemistry
ISSN: 2046-2069
Persistent Link: http://dx.doi.org/10.1039/c6ra02864k
http://hdl.handle.net/10735.1/5837
Bibliographic Citation: Kiswandhi, A., B. Lama, P. Niedbalski, M. Goderya, et al. 2016. "The effect of glassing solvent deuteration and Gd³⁺ doping on ¹³C DNP at 5 T." RSC Advances 6, doi:10.1039/C6RA02864K
Terms of Use: ©2016 The Royal Society of Chemistry. This article may not be further made available or distributed.
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