DNP sensitivity of F-19-NMR signals in hexafluorobenzene depending on polarizing agent type
No Thumbnail Available
Date
2016-06-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
Low field dynamic nuclear polarization or low field magnetic double resonance technique enables enhanced nuclear magnetic resonance signals to be detected without increasing the strength of the polarizing field. The study reports that the dynamic nuclear polarization of F-19 nuclei in hexafluorobenzene solutions doped with nitroxide, BDPA, MC800 asphaltene and MC30 asphaltene free radicals at 15 G. The F-19 nuclei in all solutions gave positive DNP enhancements changing between 3.42 and 189.54, corresponding to predominantly scalar interactions with the unpaired electrons in the radicals. DNP sensitivity of F-19 nuclei in hexafluorobenzene was observed to be changed significantly depending on the radical type. Nitroxide was found to have the best DNP performance among the polarizing agents.
Description
Keywords
Chemistry, Spectroscopy, Dynamic nuclear polarization, Scalar interactions, Hexafluorobenzene, Fluorine magnetic resonance, Free radical, Nitroxide, Pulse model, Dynamic nuclear-polarization, Electron double-resonance, Solution-state, Systems, Field
Citation
Peksöz, A. (2016). "DNP sensitivity of F-19-NMR signals in hexafluorobenzene depending on polarizing agent type". Magnetic Resonance in Chemistry, 54(9), 748-752.