Coherent Dynamic Nuclear Polarization using Chirped Pulses
Yifan Quan, Manoj Vinayaka Hanabe Subramanya, Yifu Ouyang, Michael Mardini, Thierry Dubroca, Stephen Hill, Robert G. Griffin
Abstract
This paper presents a study of coherent dynamic nuclear polarization (DNP) using frequency swept pulses at 94 GHz which optimize the polarization transfer efficiency. Accordingly, an enhancement ε ∼ 496 was observed using 10 mM trityl-OX063 as the polarizing agent in a standard 6:3:1 d 8 -glycerol/D 2 O/H 2 O glassing matrix at 70 K. At present, this is the largest DNP enhancement reported at this microwave frequency and temperature. Furthermore, the frequency swept pulses enhance the nuclear magnetic resonance (NMR) signal and reduce the recycle delay, accelerating the NMR signal acquisition.
Topics & Concepts
Polarization (electrochemistry)MicrowaveMaterials scienceSIGNAL (programming language)Nuclear magnetic resonanceOpticsPhysicsChemistryComputer scienceQuantum mechanicsPhysical chemistryProgramming languageAdvanced NMR Techniques and ApplicationsSolid-state spectroscopy and crystallographyElectron Spin Resonance Studies