The flow transfer of a bolus with 1H dynamic nuclear polarization from low to high magnetic fields

Studies involving a flowing bolus enhanced in a low magnetic field (0.34 T) with dynamic nuclear polarization (DNP), but monitored in a high magnetic field (4.7 T, 200 MHz 1H NMR) are reported. The advantages of monitoring the NMR signal at high magnetic fields are increased chemical shift dispersio...

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Bibliographic Details
Published inChemical physics letters Vol. 155; no. 2; pp. 227 - 232
Main Authors Dorn, H.C., Gitti, R., Tsai, K.H., Glass, T.E.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.02.1989
Elsevier Science
Subjects
Exact sciences and technology
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipments and techniques
NMR spectrometry
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Summary:Studies involving a flowing bolus enhanced in a low magnetic field (0.34 T) with dynamic nuclear polarization (DNP), but monitored in a high magnetic field (4.7 T, 200 MHz 1H NMR) are reported. The advantages of monitoring the NMR signal at high magnetic fields are increased chemical shift dispersion and greater magnetization flux at the NMR detector. For several different flowing fluids, the enhancement of the low field polarized signal exceeds the normal thermal Boltzmann magnetization for a high magnetic field system (4.7 T). Stable nitroxide radical systems immobilized on silica gel were utilized in these flow solid/liquid intermolecular transfer (SLIT) 1H DNP experiments.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(89)85354-0