Photochemically Induced Dynamic Nuclear Polarization of Heteronuclear Singlet Order

Photochemically Induced Dynamic Nuclear Polarization of Heteronuclear Singlet Order Full article

Journal

The Journal of Physical Chemistry Letters
ISSN: 1948-7185

Output data

Year: 2021, Volume: 12, Number: 19, Pages: 4686-4691 Pages count : 6 DOI: 10.1021/acs.jpclett.1c00503

Authors

Sheberstov Kirill F. ^1,2 , Chuchkova Liubov ^2,3 , Hu Yinan ^1,2 , Zhukov Ivan V. ^4,5 , Kiryutin Alexey S. ^4,5 , Eshtukov Artur V. ⁶ , Cheshkov Dmitry A. ⁶ , Barskiy Danila A. ^1,2 , Blanchard John W. ² , Budker Dmitry ^1,2,7 , Ivanov Konstantin L. ^4,5 , Yurkovskaya Alexandra V. ^4,5

Affiliations

1	Institut für Physik, Johannes Gutenberg Universität-Mainz, 55128 Mainz, Germany;
2	GSI Helmholtzzentrum für Schwerionenforschung, Helmholtz- Institut Mainz, 55128 Mainz, Germany
3	Faculté des Sciences Mirande, Université de Bourgogne, Dijon 21078, France
4	International Tomography Center SB RAS, Novosibirsk 630090, Russia
5	Novosibirsk State University, Novosibirsk 630090, Russia
6	State Scientific Research Institute of Chemistry and Technology of Organoelement Compounds, Moscow 105118, Russia
7	University of California, Berkeley, California 94720-7300, United States

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.

Sheberstov K.F. , Chuchkova L. , Hu Y. , Zhukov I.V. , Kiryutin A.S. , Eshtukov A.V. , Cheshkov D.A. , Barskiy D.A. , Blanchard J.W. , Budker D. , Ivanov K.L. , Yurkovskaya A.V.
Photochemically Induced Dynamic Nuclear Polarization of Heteronuclear Singlet Order
The Journal of Physical Chemistry Letters. 2021. V.12. N19. P.4686-4691. DOI: 10.1021/acs.jpclett.1c00503 WOS

Submitted:	Apr 15, 2021
Accepted:	May 7, 2021
Published online:	May 12, 2021

Web of science:

WOS:000655640200026

Пока нет цитирований