Pulsed NMR spectrometer with dynamic nuclear polarization for weak magnetic fields

被引：9
|
作者：
Alexandrov, A. S. [1 ]
Ivanov, A. A. [1 ]
Archipov, R. V. [1 ]
Gafurov, M. R. [1 ]
Tagirov, M. S. [1 ,2 ]
机构：
[1] Kazan Fed Univ, Kremlevskaya 18, Kazan 420008, Russia
[2] Tatarstan Acad Sci, Inst Appl Res, Kazan 420111, Russia
来源：
MAGNETIC RESONANCE IN SOLIDS | 2019年 / 21卷 / 02期
关键词：
magnetic resonance; Overhauser effect; dynamic polarization of nuclei; NMR; DNP; CRUDE; COMPLEX;
D O I：
10.26907/mrsej-19203
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Pulsed nuclear magnetic resonance (NMR) spectrometer operating in weak magnetic field (similar to 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 H-1 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 epsilon = -50 for H-1 NMR signal from solvent protons by pumping Cr-52(5+) electronic transitions with the optimized pumping parameters was achieved.
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页数：6
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