Three mechanisms of room temperature dynamic nuclear polarization occur simultaneously in an ionic liquid
Bulat Gizatullin, Carlos Mattea, Siegfried Stapf
Abstract
Dynamic nuclear polarization is a versatile approach to increasing the sensitivity of NMR measurements and is achieved by any of four different mechanisms which dominate for either liquids or solids, depending on temperature and radical density. In this work, we unequivocally demonstrate for the first time the coexistence, at a comparable magnitude, of several mechanisms, namely the Overhauser effect, solid effect, and cross-effect/thermal mixing in a viscous ionic liquid at ambient temperatures.
Topics & Concepts
Ionic liquidPolarization (electrochemistry)ChemistryChemical physicsNuclear Overhauser effectThermalIonic bondingWork (physics)Nuclear magnetic resonance spectroscopyAnalytical Chemistry (journal)ThermodynamicsNuclear magnetic resonancePhysical chemistryOrganic chemistryIonPhysicsCatalysisAdvanced NMR Techniques and ApplicationsSolid-state spectroscopy and crystallographyNMR spectroscopy and applications