2022-04-142022-04-142010Ovalıoğlu, H. vd. (2010). "Dynamic nuclear polarization in highly fluorinated solutions". Journal of Dispersion Science and Technology, 31(3), 332-337.0193-2691https://doi.org/10.1080/01932690903192572https://www.tandfonline.com/doi/full/10.1080/01932690903192572http://hdl.handle.net/11452/25786The Overhauser effect type dynamic nuclear polarization experiments were performed to study solutions of the stable free radical alpha,gamma-Bisdiphenylene-beta-phenyl allyl complex with benzene (1:1) in some highly fluorinated aliphatic and aromatic solvents. In solutions examined in this study, it occurs mainly the Overhauser effect, which normally arises due to both dipolar and scalar interactions between the unpaired electrons of the free radical molecules and fluorine nuclei of solvent molecules. 1-Iodotridecafluorohexane, N-Methyl-bis-trifluoroacetamide, Octafluorotoluene and Hexafluorobenzene were used as the solvents. The experiments were performed at a low field double resonance NMR spectrometer, which operates at 1.53 mT. The NMR enhancements depend on competition between intermolecular magnetic interactions. It was studied to investigate variation of EPR spectra with four different temperatures. It was found as temperature increases, peak points of EPR spectra decreases.eninfo:eu-repo/semantics/closedAccessDynamic nuclear polarizationEPR spectraFluorine-electron double resonanceFree radicalOverhauser effectElectron-double-resonanceLow magnetic-fieldsParamagnetic-resonanceOximetrySuspensionsScienceChemistryBenzeneComplexationElectron resonanceExperimentsFluorineFree radicalsNuclear magnetic resonanceOrganic solventsQuantum theorySpectrometersSpin polarizationSpin-lattice relaxationAllyl complexesAromatic solventDouble resonanceDynamic nuclear polarizationEPR spectraHexafluorobenzeneLow fieldMagnetic interactionsNMR spectrometerOverhauser effectSolvent moleculesTemperature increaseTrifluoroacetamidesUnpaired electronsElectron spin resonance spectroscopyArticle0002758609000102-s2.0-77951148690332337313Chemistry, physicalMagic Angle Spinning; Spin Polarization; Cyclotron Resonance Devices