Publication:
Dynamic nuclear polarization in some aliphatic and aromatic solutions as studied by fluorine-electron double resonance

dc.contributor.authorÇimenoǧlu, Mehmet Akif
dc.contributor.buuauthorPeksöz, Ahmet
dc.contributor.buuauthorYalçıner, Aytaç
dc.contributor.departmentFen Edebiyat Fakültesi
dc.contributor.departmentFizik Bölümü
dc.contributor.researcheridAAG-9772-2021
dc.contributor.scopusid23100976500
dc.contributor.scopusid14055078800
dc.date.accessioned2022-06-23T12:12:46Z
dc.date.available2022-06-23T12:12:46Z
dc.date.issued2008-01
dc.description.abstractDynamic nuclear polarization experiments were performed to study the 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, 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 occurs mainly. 1-Iodotridecafluorohexane, 2,2,3,4,4,4-Hexafluoro-1-butanol, N-methyl-bis-trifluoroacetamide, hexafluoroacetylacetone, 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. The measurements were performed at four different temperatures to test the dipolar and the scalar part of the coupling between the fluorine nucleus (F-19) and the unpaired electron. It was found that the dipolar interactions are more effective for the aliphatic solvents, while the scalar interactions are more effective for the aromatics. The nuclear-electron coupling parameter varies between 0.018 and 0.157 in all aliphatic solvents and between -0.063 and -0.035 in aromatic solvents.
dc.identifier.citationPeksöz, A. vd. (2008). "Dynamic nuclear polarization in some aliphatic and aromatic solutions as studied by fluorine-electron double resonance". Journal of Dispersion Science and Technology, 29(1), 40-45.
dc.identifier.endpage45
dc.identifier.issn0193-2691
dc.identifier.issue1
dc.identifier.scopus2-s2.0-37549001728
dc.identifier.startpage40
dc.identifier.urihttps://doi.org/10.1080/01932690701686809
dc.identifier.urihttps://www.tandfonline.com/doi/full/10.1080/01932690701686809
dc.identifier.urihttp://hdl.handle.net/11452/27373
dc.identifier.volume29
dc.identifier.wos000251991200005
dc.indexed.wosSCIE
dc.language.isoen
dc.publisherTaylor & Francis
dc.relation.bapF-2003/5
dc.relation.collaborationSanayi
dc.relation.journalJournal of Dispersion Science and Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDouble resonance
dc.subjectDynamic nuclear polarization
dc.subjectFluorine-electron double resonance
dc.subjectOverhauser effect
dc.subjectAromatic compounds
dc.subjectElectrons
dc.subjectFluorine
dc.subjectFree radicals
dc.subjectMolecular interactions
dc.subjectPolarization
dc.subjectSolvents
dc.subjectIntermolecular magnetic interactions
dc.subjectOverhauser effect
dc.subjectPolarization
dc.subjectLow magnetic-fields
dc.subjectFree-radicals
dc.subjectOximetry
dc.subjectChemistry
dc.subject.scopusMagic Angle Spinning; Spin Polarization; Cyclotron Resonance Devices
dc.subject.wosChemistry, physical
dc.titleDynamic nuclear polarization in some aliphatic and aromatic solutions as studied by fluorine-electron double resonance
dc.typeArticle
dc.wos.quartileQ4
dspace.entity.typePublication
local.contributor.departmentFen Edebiyat Fakültesi/Fizik Bölümü
local.indexed.atScopus
local.indexed.atWOS

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