Pulsed NMR spectrometer with dynamic nuclear polarization for weak magnetic fields
https://doi.org/10.26907/mrsej-19203
Abstract
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.
About the Authors
A. S. Alexandrov
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
A. A. Ivanov
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
R. V. Archipov
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
M. R. Gafurov
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
M. S. Tagirov
Kazan Federal University; Institute of Applied Research, Tatarstan Academy of Sciences
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008; Kazan 420111
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Review
For citations:
Alexandrov A.S., Ivanov A.A., Archipov R.V., Gafurov M.R., Tagirov M.S. Pulsed NMR spectrometer with dynamic nuclear polarization for weak magnetic fields. Magnetic Resonance in Solids. 2019;21(2):19203 (6 pp.). https://doi.org/10.26907/mrsej-19203
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