High-Resolution NMR of the Hydrogenation Reaction with Parahydrogen in an Inhomogeneous Magnetic Field | Sciact - CRIS-система Института катализа

High-Resolution NMR of the Hydrogenation Reaction with Parahydrogen in an Inhomogeneous Magnetic Field Научная публикация

Журнал

Journal of Physical Chemistry Letters
ISSN: 1948-7185

Вых. Данные

Год: 2025, Том: 16, Номер: 2, Страницы: 650-657 Страниц : 8 DOI: 10.1021/acs.jpclett.4c03154

Ключевые слова

Atomic emission spectroscopy; Nuclear magnetic resonance; Nuclear magnetic resonance spectroscopy; Spectroscopic analysis

Авторы

Kononenko Elizaveta S. ^1,2 , Skovpin Ivan V. ¹ , Kovtunova Larisa M. ^3,1,2 , Koptyug Igor V. ¹

Организации

1	International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia
2	Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090, Russia
3	Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., Novosibirsk 630090, Russia

Информация о финансировании (1)

Российский научный фонд

24-73-10093

Nuclear magnetic resonance is extremely attractive for operando studies of chemical reactors. However, the heterogeneous catalyst particles placed inside an NMR probe greatly affect the uniformity of the magnetic field. This problem is especially acute when studying heterogeneous hydrogenation processes using parahydrogen. Despite the increased sensitivity due to hyperpolarization, under conditions of a strong heterogeneity of the magnetic field, the antiphase nature of the NMR signals leads to a partial or even a complete loss of spectroscopic information due to significant NMR signal broadening. The use of intramolecular multiple-quantum coherences in 2D NMR allows one to circumvent this problem. We used the COSY pulse sequence to acquire 2D NMR spectra of the reaction mixture upon propene hydrogenation with parahydrogen. The selection of double-quantum coherences in the resulting 2D NMR spectrum allowed us to obtain a highly resolved NMR spectrum under conditions of severe inhomogeneity of the magnetic field caused by the presence of catalyst granules.

Kononenko E.S. , Skovpin I.V. , Kovtunova L.M. , Koptyug I.V.
High-Resolution NMR of the Hydrogenation Reaction with Parahydrogen in an Inhomogeneous Magnetic Field
Journal of Physical Chemistry Letters. 2025. V.16. N2. P.650-657. DOI: 10.1021/acs.jpclett.4c03154 WOS Scopus OpenAlex

Поступила в редакцию:	2 нояб. 2024 г.
Принята к публикации:	6 янв. 2025 г.
Опубликована online:	9 янв. 2025 г.
Опубликована в печати:	16 янв. 2025 г.

Web of science:	WOS:001393253200001
Scopus:	2-s2.0-85214323476
OpenAlex:	W4406217206

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