Probing Gas Adsorption in Metal–Organic Framework ZIF-8 by EPR of Embedded Nitroxides | Sciact - CRIS-система Института катализа

Probing Gas Adsorption in Metal–Organic Framework ZIF-8 by EPR of Embedded Nitroxides Научная публикация

Журнал

The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455

Вых. Данные

Год: 2017, Том: 121, Номер: 36, Страницы: 19880-19886 Страниц : 7 DOI: 10.1021/acs.jpcc.7b06884

Ключевые слова

ELECTRON-PARAMAGNETIC-RESONANCE; CARBON-DIOXIDE; FORCE-FIELD; MOLECULAR-DYNAMICS; IMIDAZOLATE; CO2; MEMBRANES; HYDROGEN; H-2; SELECTIVITY

Авторы

Sheveleva A.M. ^1,2 , Anikeenko A.V. ^2,3 , Poryvaev A.S. ^1,2 , Kuzmina D.L. ^1,2 , Shundrina I.K. ⁴ , Kolokolov D.I. ^2,5 , Stepanov A.G. ^2,5 , Fedin M.V. ^1,2

Организации

1	International Tomography Center SB RAS, 630090, Novosibirsk, Russia
2	Novosibirsk State University, 630090, Novosibirsk, Russia
3	Voevodsky Institute of Chemical Kinetics and Combustion, 630090, Novosibirsk, Russia
4	N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 630090, Novosibirsk, Russia
5	Boreskov Institute of Catalysis SB RAS, Lavrentiev av. 5, 630090, Novosibirsk, Russia

Информация о финансировании (3)

1	Российский научный фонд	14-13-00826
2	Федеральное агентство научных организаций России	V.44.1.8. (0333-2016-0001)
3	Министерство образования и науки Российской Федерации	МК-3272.2017.3

Metal–organic frameworks (MOFs) are being increasingly considered as promising materials for gas separation and storage, yet specific interactions between gas molecules and the inner surface of pores are still not well understood. In this work, we propose a new approach for investigation of such interactions by Electron Paramagnetic Resonance (EPR). We use stable nitroxide radicals as multifunctional agents embedded into the pores of a MOF prior to the gas sorption. They act as EPR-active reporters, and simultaneously as competitor molecules during the gas adsorption process. We exemplify this approach using a ZIF-8 framework, nitroxide TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl), and CO2, N2, and O2 gases. The mobility of nitroxide monitored by continuous wave EPR behaves differently upon adsorption of each of these gases. In particular, a noticeable increase of mobility in the presence of CO2 reveals the weakening of guest–host interactions TEMPO–MOF induced by CO2, which was qualitatively supported by molecular dynamic calculations. The nitroxides can be embedded in MOFs postsynthetically, and their negligible amounts (≤1 per 1000 cells) are required due to a high sensitivity of EPR. Therefore, the proposed approach is sufficiently versatile and might find broad applications for various MOFs.

Sheveleva A.M. , Anikeenko A.V. , Poryvaev A.S. , Kuzmina D.L. , Shundrina I.K. , Kolokolov D.I. , Stepanov A.G. , Fedin M.V.
Probing Gas Adsorption in Metal–Organic Framework ZIF-8 by EPR of Embedded Nitroxides
The Journal of Physical Chemistry C. 2017. V.121. N36. P.19880-19886. DOI: 10.1021/acs.jpcc.7b06884 WOS Scopus РИНЦ CAPlus OpenAlex

Поступила в редакцию:	13 июл. 2017 г.
Принята к публикации:	18 авг. 2017 г.
Опубликована online:	5 сент. 2017 г.
Опубликована в печати:	14 сент. 2017 г.

Web of science:	WOS:000411171800035
Scopus:	2-s2.0-85029536713
РИНЦ:	31062685
Chemical Abstracts:	2017:1364264
OpenAlex:	W2747747429

БД	Цитирований
Web of science	18
Scopus	19
РИНЦ	20
OpenAlex	18