Spin Order Transfer from a Parahydrogen Molecule to a Cyanide Ion in the Iridium Complex under the SABRE Conditions

Spin Order Transfer from a Parahydrogen Molecule to a Cyanide Ion in the Iridium Complex under the SABRE Conditions Full article

Journal

Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
ISSN: 1070-3284

Output data

Year: 2023, Volume: 49, Number: 8, Pages: 471-478 Pages count : 8 DOI: 10.1134/s1070328423600444

Authors

Zlobina V.V. ^1,2 , Spiridonov K.A. ^1,3 , Nikovskii I.A. ¹ , Peregudov A.S. ¹ , Kiryutin A.S. ^4,5 , Yurkovskaya A.V. ^4,5 , Polezhaev A.A. ⁶ , Novikov V.V. ²

Affiliations

1	Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
2	Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow oblast, Russia
3	Moscow State University, Moscow, Russia
4	International Tomography Center, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
5	Novosibirsk State University, Novosibirsk, Russia
6	Bauman State Technical University (National Research University), Moscow, Russia

A possibility of generating a high degree of spin polarization of 13C and 15N nuclei in the cyanide ion, which forms the coordination bond with the metal ion, using parahydrogen is demonstrated for the first time for the new iridium carbene complex as an example. The spin–spin interaction constants in the synthesized complex and the structure of the hydride intermediate are determined by an analysis of the 13С NMR spectra detected using broadband and selective heteronuclear decoupling. The cyanide ion is shown to coordinate to the metal ion by the carbon atom in one of two equatorial positions, and two pyridine molecules are arranged in the axial and equatorial positions. The signal amplification factors for 13С and 15N nuclei of the cyanide anion (5665 and –49 555, respectively) are estimated by NMR spectroscopy of the polarized substrate using the SABRE method from an ultralow magnetic field of 0.5 μT. This amplification corresponds to 15.5% polarization of nitrogen nuclei achieved within several seconds at room temperature.

Zlobina V.V. , Spiridonov K.A. , Nikovskii I.A. , Peregudov A.S. , Kiryutin A.S. , Yurkovskaya A.V. , Polezhaev A.A. , Novikov V.V.
Spin Order Transfer from a Parahydrogen Molecule to a Cyanide Ion in the Iridium Complex under the SABRE Conditions
Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya. 2023. V.49. N8. P.471-478. DOI: 10.1134/s1070328423600444 WOS OpenAlex

Злобина В.В. , Спиридонов К.А. , Никовский И.А. , Перегудов А.С. , Кирютин А.С. , Юрковская А.В. , Полежаев А.А. , Новиков В.В.
Перенос спинового порядка с молекулы параводорода на цианидный ион в комплексе иридия в условиях SABRE
Координационная химия. 2023. Т.49. №8. С.458-465. DOI: 10.31857/s0132344x22600606 OpenAlex

Submitted:	Dec 21, 2022
Accepted:	Mar 16, 2023
Published online:	Aug 24, 2023

Web of science:	WOS:001054447000002
OpenAlex:	W4386148237

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