Complete magnetic field dependence of SABRE-derived polarization | Sciact

Complete magnetic field dependence of SABRE-derived polarization Научная публикация

Журнал

Magnetic Resonance in Chemistry
ISSN: 0749-1581

Вых. Данные

Год: 2018, Том: 56, Номер: 7, Страницы: 651-662 Страниц : 12 DOI: 10.1002/mrc.4694

Авторы

Kiryutin Alexey S ^1,2 , Yurkovskaya Alexandra V. ^1,2 , Zimmermann Herbert ³ , Vieth Hans-Martin ^1,4 , Ivanov Konstantin L. ^1,2

Организации

1	International Tomography Center SB RAS, Novosibirsk 630090, Russia
2	Novosibirsk State University, Novosibirsk 630090, Russia
3	Max‐Planck‐Institut für Medizinische Forschung, Dept. of Biomolecular Mechanisms, Jahnstrasse 29, Heidelberg 69028, Germany
4	Freie Universität Berlin, Berlin 14195, Germany

Signal amplification by reversible exchange (SABRE) is a promising hyperpolarization technique, which makes use of spin-order transfer from parahydrogen (the H2 molecule in its singlet spin state) to a to-be-polarized substrate in a transient organometallic complex, termed the SABRE complex. In this work, we present an experimental method for measuring the magnetic field dependence of the SABRE effect over an ultrawide field range, namely, from 10 nT to 10 T. This approach gives a way to determine the complete magnetic field dependence of SABRE-derived polarization. Here, we focus on SABRE polarization of spin-1/2 hetero-nuclei, such as (13) C and (15) N and measure their polarization in the entire accessible field range; experimental studies are supported by calculations of polarization. Features of the field dependence of polarization can be attributed to level anticrossings in the spin system of the SABRE complex. Features at magnetic fields of the order of 100 nT-1 muT correspond to "strong coupling" of protons and hetero-nuclei, whereas features found in the mT field range stem from "strong coupling" of the proton system. Our approach gives a way to measuring and analyzing the complete SABRE field dependence, to probing NMR parameters of SABRE complexes and to optimizing the polarization value.

Kiryutin A.S. , Yurkovskaya A.V. , Zimmermann H. , Vieth H-M. , Ivanov K.L.
Complete magnetic field dependence of SABRE-derived polarization
Magnetic Resonance in Chemistry. 2018. V.56. N7. P.651-662. DOI: 10.1002/mrc.4694

Поступила в редакцию:	15 сент. 2017 г.
Принята к публикации:	29 нояб. 2017 г.
Опубликована online:	12 дек. 2017 г.

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