Mobility of Aromatic Guests and Isobutane in ZIF-8 Metal-Organic Framework Studied by 2H Solid State NMR Spectroscopy Full article
| Journal |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
||||
|---|---|---|---|---|---|
| Output data | Year: 2019, Volume: 123, Number: 22, Pages: 13765-13774 Pages count : 10 DOI: 10.1021/acs.jpcc.9b03081 | ||||
| Tags | Zeolitic Imidazolate Frameworks; Deuterium NMR; Separation; Adsorption; CO2; Diffusion; Mixtures; Dynamics; Temperature; Adsorbents | ||||
| Authors |
|
||||
| Affiliations |
|
Funding (3)
| 1 | Russian Science Foundation | 17-73-10135 |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0003 |
| 3 | Russian Foundation for Basic Research | 18-29-04009 |
Abstract:
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.
Cite:
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 ANCAN OpenAlex
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 ANCAN OpenAlex
Dates:
| Submitted: | Apr 2, 2019 |
| Accepted: | May 6, 2019 |
| Published online: | May 15, 2019 |
| Published print: | Jun 6, 2019 |
Identifiers:
| Web of science: | WOS:000470938400046 |
| Scopus: | 2-s2.0-85067125793 |
| Elibrary: | 41631897 |
| Chemical Abstracts: | 2019:947655 |
| Chemical Abstracts (print): | 171:19069 |
| OpenAlex: | W2945767326 |