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2D Mapping of NMR Signal Enhancement and Relaxation for Heterogeneously Hyperpolarized Propane Gas Научная публикация

Журнал The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455
Вых. Данные Год: 2017, Том: 121, Номер: 18, Страницы: 10038-10046 Страниц : 9 DOI: 10.1021/acs.jpcc.7b02506
Ключевые слова Catalysts; Contrast media; Gas mixtures; Hydrogen; Magnetic resonance imaging; Mapping; Nuclear magnetic resonance; Polarization; Porous materials; Propane; Propylene; Rhodium compounds; Titanium compounds; X ray photoelectron spectroscopy
Авторы Barskiy Danila A. 1 , Kovtunov Kirill V. 2,3 , Gerasimov Evgeny Y. 3,4 , Phipps M.Anthony 1 , Salnikov Oleg G. 2,3 , Coffey Aaron M. 1 , Kovtunova Larisa M. 3,4 , Prosvirin Igor P. 3,4 , Bukhtiyarov Valerii I. 3,4 , Koptyug Igor V. 2,3 , Chekmenev Eduard Y. 1,5,6
Организации
1 Vanderbilt University Institute of Imaging Science (VUIIS), Department of Radiology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
2 International Tomography Center SB RAS, Novosibirsk 630090, Russia
3 Novosibirsk State University, Novosibirsk 630090, Russia
4 Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
5 Department of Biomedical Engineering, Department of Physics, Vanderbilt-Ingram Cancer Center (VICC), Nashville, Tennessee 37232, United States
6 Russian Academy of Sciences, 19991 Moscow, Russia

Информация о финансировании (11)

1 Российский научный фонд 14-23-00146
2 Российский фонд фундаментальных исследований 16-03-00407
3 Министерство образования и науки Российской Федерации МК-4498.2016.3
4 National Institutes of Health 1R21EB018014
5 National Institutes of Health 1R21EB020323
6 National Science Foundation CHE-1416268
7 United States Department of Defense W81XWH-12-1-0159/BC112431
8 United States Department of Defense W81XWH-15-1-0271
9 National Science Foundation CHE-1416432
10 United States Department of Defense W81XWH-15-1-0272
11 Федеральное агентство научных организаций России V.44.1.8. (0333-2016-0001)

Реферат: Hyperpolarized (HP) propane is a promising contrast agent for magnetic resonance imaging (MRI) of lungs and for studying porous media. The parahydrogen-induced polarization (PHIP) technique is a convenient approach to produce pure propane gas with enhanced proton polarization, when hydrogenation of propylene with parahydrogen is performed over heterogeneous catalysts. Here, we present a new approach of multidimensional mapping of the efficiency of pairwise parahydrogen addition using PHIP-echo pulse sequence. We use this approach to study the performance of three model heterogeneous Rh/TiO2 catalysts in the production of HP propane gas. The three catalysts with 1.0, 13.7, and 23.2 wt % of supported rhodium nanoparticles have been characterized by X-ray photoelectron spectroscopy (XPS) and high resolution transition electron microscopy (HRTEM). By varying the fractions of parahydrogen and propylene in the reactant mixture as well as the gas mixture pressure, 2D maps of PHIP-echo NMR signal and 2D maps of HP propane NMR signal enhancement were obtained. These maps clearly indicate that lower metal coverage results in more efficient pairwise hydrogen addition, producing greater levels of proton polarization of propane gas. The presented method can be extended to multidimensional characterization of the influence of other key parameters of PHIP reaction process including temperature or addition of an inert carrier gas. A 2D T1 relaxation map of propane at 9.4 T is also reported as a function of propane fraction (in the mixture with hydrogen) and gas mixture pressure.
Библиографическая ссылка: Barskiy D.A. , Kovtunov K.V. , Gerasimov E.Y. , Phipps M.A. , Salnikov O.G. , Coffey A.M. , Kovtunova L.M. , Prosvirin I.P. , Bukhtiyarov V.I. , Koptyug I.V. , Chekmenev E.Y.
2D Mapping of NMR Signal Enhancement and Relaxation for Heterogeneously Hyperpolarized Propane Gas
The Journal of Physical Chemistry C. 2017. V.121. N18. P.10038-10046. DOI: 10.1021/acs.jpcc.7b02506 WOS Scopus РИНЦ CAPlusCA OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 16 мар. 2017 г.
Принята к публикации: 18 апр. 2017 г.
Опубликована online: 18 апр. 2017 г.
Опубликована в печати: 11 мая 2017 г.
Идентификаторы БД:
Web of science: WOS:000401402100042
Scopus: 2-s2.0-85020414755
РИНЦ: 35481015
Chemical Abstracts: 2017:629630
Chemical Abstracts (print): 166:459712
OpenAlex: W2605856693
Цитирование в БД:
БД Цитирований
Web of science 31
Scopus 32
РИНЦ 30
OpenAlex 35
Альметрики: