Issue 22, 2010
From the journal:

Physical Chemistry Chemical Physics

Dynamic nuclear polarization experiments at 14.1 T for solid-state NMR

Yoh Matsuki,a   Hiroki Takahashi,a   Keisuke Ueda,a   Toshitaka Idehara,b   Isamu Ogawa,b   Mitsuru Toda,b   Hideo Akutsua  and  Toshimichi Fujiwara*a  

* Corresponding authors

a Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan

b Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui, Japan
E-mail: tfjwr@protein.osaka-u.ac.jp
Fax: +81-6-6879-8599
Tel: +81-6-6879-8598

Abstract

Instrumentation for high-field dynamic nuclear polarization (DNP) at 14.1 T was developed to enhance the nuclear polarization for NMR of solids. The gyrotron generated 394.5 GHz submillimeter (sub-mm) wave with a power of 40 W in the second harmonic TE0,6 mode. The sub-mm wave with a power of 0.5–3 W was transmitted to the sample in a low-temperature DNP-NMR probe with a smooth-wall circular waveguide system. The 1H polarization enhancement factor of up to about 10 was observed for a 13C-labeled compound with nitroxyl biradical TOTAPOL. The DNP enhancement was confirmed by the static magnetic field dependence of the NMR signal amplitude at 90 K. Improvements of the high-field DNP experiments are discussed.

Graphical abstract: Dynamic nuclear polarization experiments at 14.1 T for solid-state NMR

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Article information

DOI
https://doi.org/10.1039/C002268C
Article type
Paper
Submitted
02 Feb 2010
Accepted
05 May 2010
First published
10 May 2010

Phys. Chem. Chem. Phys., 2010,12, 5799-5803

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Dynamic nuclear polarization experiments at 14.1 T for solid-state NMR

Y. Matsuki, H. Takahashi, K. Ueda, T. Idehara, I. Ogawa, M. Toda, H. Akutsu and T. Fujiwara, Phys. Chem. Chem. Phys., 2010, 12, 5799 DOI: 10.1039/C002268C

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