Mobility of Aromatic Guests and Isobutane in ZIF-8 Metal-Organic Framework Studied by 2H Solid State NMR Spectroscopy | Sciact - CRIS-система Института катализа

Mobility of Aromatic Guests and Isobutane in ZIF-8 Metal-Organic Framework Studied by 2H Solid State NMR Spectroscopy Научная публикация

Журнал

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

Вых. Данные

Год: 2019, Том: 123, Номер: 22, Страницы: 13765-13774 Страниц : 10 DOI: 10.1021/acs.jpcc.9b03081

Ключевые слова

Zeolitic Imidazolate Frameworks; Deuterium NMR; Separation; Adsorption; CO2; Diffusion; Mixtures; Dynamics; Temperature; Adsorbents

Авторы

Khudozhitkov Alexander E. ^1,2 , Arzumanov Sergei S. ^1,2 , Kolokolov Daniil I. ^1,2 , Stepanov Alexander G. ^1,2

Организации

1	Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk, 630090, Russian Federation
2	Novosibirsk State University, Pirogova Street 2, Novosibirsk, 630090, Russian Federation

Информация о финансировании (3)

1	Российский научный фонд	17-73-10135
2	Федеральное агентство научных организаций России	0303-2016-0003
3	Российский фонд фундаментальных исследований	18-29-04009

Metal-organic framework ZIF-8 is renowned for its adsorption and separation properties influenced by the framework flexibility. Although much effort was put into understanding the molecular mechanism of such gate-opening (dynamical and static), the mobility of large guest themselves remained unclear. In this work, we present a detailed 2H solid-state NMR investigation of large guests (xylene isomers, benzene, toluene, and isobutane) confined inside the ZIF-8. Evolution of line shape and T1, T2 relaxation times with temperature were interpreted in terms of existence of three different motional states for diffusing guest molecules: (i) the highly mobile guest molecules located in the central part of the cage; (ii) the bound state for a guest located on the cage wall or near the window; and (iii) the guest squeezing through the window with a subsequent release to the next cage. We report detailed quantitative analysis of molecular dynamics in each of the states and the kinetics of exchange between the bound and mobile states. © 2019 American Chemical Society.

Khudozhitkov A.E. , Arzumanov S.S. , Kolokolov D.I. , Stepanov A.G.
Mobility of Aromatic Guests and Isobutane in ZIF-8 Metal-Organic Framework Studied by 2H Solid State NMR Spectroscopy
The Journal of Physical Chemistry C. 2019. V.123. N22. P.13765-13774. DOI: 10.1021/acs.jpcc.9b03081 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	2 апр. 2019 г.
Принята к публикации:	6 мая 2019 г.
Опубликована online:	15 мая 2019 г.
Опубликована в печати:	6 июн. 2019 г.

Web of science:	WOS:000470938400046
Scopus:	2-s2.0-85067125793
РИНЦ:	41631897
Chemical Abstracts:	2019:947655
Chemical Abstracts (print):	171:19069
OpenAlex:	W2945767326

БД	Цитирований
Scopus	23
Web of science	23
РИНЦ	22
OpenAlex	25