6533b82bfe1ef96bd128d7fd
RESEARCH PRODUCT
Photochemically induced dynamic nuclear polarization of heteronuclear singlet order
John W. BlanchardYinan HuAlexandra V. YurkovskayaLiubov ChuchkovaDmitry A. CheshkovIvan V. ZhukovArtur V. EshtukovAlexey S. KiryutinKirill F. SheberstovKonstantin L. IvanovDanila A. BarskiyDmitry BudkerDmitry Budkersubject
Chemical Physics (physics.chem-ph)Materials scienceSpin statesSpinsField (physics)CIDNPPhysics::Medical PhysicsFOS: Physical sciences02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyPolarization (waves)7. Clean energy01 natural sciences0104 chemical sciencesMagnetic fieldHeteronuclear moleculePhysics - Chemical Physicsddc:530General Materials ScienceSinglet statePhysical and Theoretical ChemistryAtomic physics0210 nano-technologydescription
Photochemically induced dynamic nuclear polarization (photo-CIDNP) is a method to hyperpolarize nuclear spins using light. In most cases, CIDNP experiments are performed in high magnetic fields and the sample is irradiated by light inside a nuclear magnetic resonance (NMR) spectrometer. Here we demonstrate photo-CIDNP hyperpolarization generated in the Earth's magnetic field and under zero- to ultralow-field (ZULF) conditions. Irradiating a sample containing tetraphenylporphyrin and para-benzoquinone for several seconds with light-emitting diodes produces strong hyperpolarization of 1H and 13C nuclear spins, enhancing the NMR signals more than 200 times. The hyperpolarized spin states at the Earth's field and in ZULF are different. In the latter case, the state corresponds to the singlet order between scalar-coupled 1H-13C nuclear spins. This state has a longer lifetime than the state hyperpolarized at Earth's field. The method is simple and cost-efficient and should be applicable to many molecular systems known to exhibit photo-CIDNP, including amino acids and nucleotides.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-15 |