Scalar dynamic nuclear polarization of protons in trifluoroacetic acid solutions
β Scribed by John N. Helbert; Edward H. Poindexter; Burkhard E. Wagner
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 286 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Strongly scalar 'H intermolecular dynamic nuclear polarization (DNP) of solvent 'H nuclei in solutions of organic free radicals has now been observed at room temperature. Transient protonation of the CFaCOOHIpyridyl imidazoline-l-oxyl radical system accounts for the observed effects.
π SIMILAR VOLUMES
Dynamic nuclear polarization of tin-l 19 in free radical solutions has been studied at 175 G. Scalar interactions are predominant for both bivalent and tetravalent tin compounds.
## Abstract Thermolysis of diβ(4βchlorobenzoyl)βperoxide was carried out in the probe of an NMR. spectrometer. The dependence of product distribution and chemically induced dynamic nuclear polarization (CIDNP.) patterns on the concentrations of radical trapping agents gives evidence that the CIDNP.