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Issue 22, 2010
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Dynamic nuclear polarization experiments at 14.1 T for solid-state NMR

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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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Publication details

The article was received on 02 Feb 2010, accepted on 05 May 2010 and first published on 10 May 2010


Article type: Paper
DOI: 10.1039/C002268C
Citation: 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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