mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-19203mrisel-47Research ArticleСтатьиPulsed NMR spectrometer with dynamic nuclear polarization for weak magnetic fieldsAlexandrovA. S.

Kremlevskaya 18, Kazan 420008

Alexandrov.Artem.Sergeyevich@gmail.comIvanovA. A.

Kremlevskaya 18, Kazan 420008

ArchipovR. V.

Kremlevskaya 18, Kazan 420008

GafurovM. R.

Kremlevskaya 18, Kazan 420008

TagirovM. S.

Kremlevskaya 18, Kazan 420008; Kazan 420111

Kazan Federal UniversityRussian FederationKazan Federal University; Institute of Applied Research, Tatarstan Academy of SciencesRussian Federation20191004201921219203 (6 pp.)Copyright © Alexandrov A.S., Ivanov A.A., Archipov R.V., Gafurov M.R., Tagirov M.S., 20242024Alexandrov A.S., Ivanov A.A., Archipov R.V., Gafurov M.R., Tagirov M.S.Alexandrov A.S., Ivanov A.A., Archipov R.V., Gafurov M.R., Tagirov M.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/47

Pulsed nuclear magnetic resonance (NMR) spectrometer operating in weak magnetic field (~100 Oe) with the dynamic nuclear polarization (DNP) is described. The spectrometer is designed to study the Overhauser DNP effect in natural hydrocarbons for potential using DNP techniques to enhance the 1H NMR signal in crude oil and petroleum products. The unit was tested on a sample of the ethylene glycol chromium complex at room temperature. A DNP enhancement of ε = −50 for 1H NMR signal from solvent protons by pumping 52Cr5+ electronic transitions with the optimized pumping parameters was achieved.

magnetic resonanceOverhauser effectdynamic polarization of nucleiNMRDNPReferencesCoates G., Xiao L., Prammer M., NMR Logging: Principles and Applications (Houston Halliburton Energy Services, 1999).Coates G., Xiao L., Prammer M., NMR Logging: Principles and Applications (Houston Halliburton Energy Services, 1999).Pradhan A., Ovalles C., Moir M., ACS Symposium Series; OUP: Washington, DC 26, 73 (2018).Pradhan A., Ovalles C., Moir M., ACS Symposium Series; OUP: Washington, DC 26, 73 (2018).Hausser K., Stehlik D., Dynamic Nuclear Polarization in Liquids (Advances in Magnetic and Optical Resonance ed. by J. S. Waugh, 1968).Hausser K., Stehlik D., Dynamic Nuclear Polarization in Liquids (Advances in Magnetic and Optical Resonance ed. by J. S. Waugh, 1968).Schops P., Spindler P., Prisner T., Zeitschrift fur Physikalische Chemie 231, 561 (2017).Schops P., Spindler P., Prisner T., Zeitschrift fur Physikalische Chemie 231, 561 (2017).Gizatullin B., Gafurov M., Rodionov A., Mamin G., Mattea C., Stapf S., Orlinskii S., Energy & Fuels 32, 11261 (2018).Gizatullin B., Gafurov M., Rodionov A., Mamin G., Mattea C., Stapf S., Orlinskii S., Energy & Fuels 32, 11261 (2018).Overhauser A., Phys. Rev. 92, 411 (1953).Overhauser A., Phys. Rev. 92, 411 (1953).Odintsov B., The Overhauser Electron-Nuclear Effect in Solutions (KPhTI, Kazan, 1986).Odintsov B., The Overhauser Electron-Nuclear Effect in Solutions (KPhTI, Kazan, 1986).Garif'ianov N., Kozyrev B., Sov. Phys. JETP 3, 255 (1956).Garif'ianov N., Kozyrev B., Sov. Phys. JETP 3, 255 (1956).Gutowsky H., Roger R., Rotledge R., Unterberger R., J. Chem. Phys. 28, 744 (1958).Gutowsky H., Roger R., Rotledge R., Unterberger R., J. Chem. Phys. 28, 744 (1958).Poindexter E., Nature 182, 1087 (1958).Poindexter E., Nature 182, 1087 (1958).Poindexter E., J. Chem. Phys. 31, 1477 (1959).Poindexter E., J. Chem. Phys. 31, 1477 (1959).Yalciner A., J. Colloid and Interface Sci. 79, 114 (1981).Yalciner A., J. Colloid and Interface Sci. 79, 114 (1981).Cimenoglu M., Akif M., Fuel 80, 2041 (2001).Cimenoglu M., Akif M., Fuel 80, 2041 (2001).Diodato R., Phys. Med. Biol. 44, 69 (1999).Diodato R., Phys. Med. Biol. 44, 69 (1999).Fedotov V., Sov. Phys. JETP 26, 1123 (1968).Fedotov V., Sov. Phys. JETP 26, 1123 (1968).Alexandrov A., Archipov R., Ivanov A., Gnezdilov O., Gafurov M., Skirda V., Appl. Magn. Reson. 45, 1275 (2014).Alexandrov A., Archipov R., Ivanov A., Gnezdilov O., Gafurov M., Skirda V., Appl. Magn. Reson. 45, 1275 (2014).

The authors declare that there are no conflicts of interest present.