В журнале The Journal of Physical Chemistry Letters (IF 5,7) опубликована статья с участием д.ф.-м.н., проф. Е.С. Багрянской (директор Института, завлаб ЛМР) и к.х.н. В.М. Тормышева (снс ЛМР):
13C Hyperpolarization of Viscous Liquids by Transfer of Solid-Effect 1H Dynamic Nuclear Polarization at High Magnetic Field
Danhua Dai, Vasyl Denysenkov, Elena G. Bagryanskaya, Victor M. Tormyshev, Thomas F. Prisner, and Andrei A. Kuzhelev
J. Phys. Chem. Lett. 2023, 14, 31, 7059–7064
Publication Date:August 1, 2023
Abstract
Dynamic nuclear polarization (DNP) is routinely used as a method for increasing the sensitivity to nuclear magnetic resonance (NMR). Recently, high-field solid-effect DNP in viscous liquids on 1H nuclei was demonstrated using narrow-line polarizing agents. Here we expand the applicability of DNP in viscous media to 13C nuclei. To hyperpolarize 13C nuclei, we combined solid-effect 1H DNP with a subsequent transfer of the 1H polarization to 13C via insensitive nuclei enhanced by polarization transfer (INEPT). We demonstrate this approach using a triarylmethyl radical as a polarizing agent and glycerol-13C3 as an analyte. We achieved 13C enhancement factors of up to 45 at a magnetic field of 9.4 T and room temperature.
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