Yıldız, FevkaniŞahin, ÖzkanPeksöz, Ahmet2024-08-062024-08-062015-01-010193-2691https://doi.org/10.1080/01932691.2014.920258https://www.tandfonline.com/doi/full/10.1080/01932691.2014.920258https://hdl.handle.net/11452/43725Overhauser dynamic nuclear polarization (DNP) technique can provide a dramatic increase in the signal obtained from nuclear magnetic resonance experiments owing to the magnetic spin-spin interactions between H-1 nuclei of the solvent and electrons delocalized on the asphaltene in crude petroleum or asphalt. Studies on H-1 Overhauser DNP enhancements at 1.53 mT are reported for benzene solvent medium with three different radical sources: Iran crude petroleum, MC30 liquid asphalt, and MC800 liquid asphalt for a range of radical concentrations. The results show that protons of benzene are good detectors for dipolar coupling.eninfo:eu-repo/semantics/closedAccessDynamic nuclear-polarizationElectron double-resonanceSuspensionsAsphaltAsphaltene crude petroleumBenzeneDynamic nuclear polarizationProton-electron double resonanceScience & technologyPhysical sciencesChemistry, physicalChemistryArticle00034890700000260461336510.1080/01932691.2014.9202581532-2351