Ultraslow Dynamics of a Framework Linker in MIL-53 (Al) as a Sensor for Different Isomers of Xylene | Sciact - CRIS-system of Boreskov Institute of Catalysis

Ultraslow Dynamics of a Framework Linker in MIL-53 (Al) as a Sensor for Different Isomers of Xylene Full article

Journal

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

Output data

Year: 2016, Volume: 120, Number: 38, Pages: 21704-21709 Pages count : 6 DOI: 10.1021/acs.jpcc.6b08114

Tags

Aluminum; Aromatic compounds; Crystalline materials; Java programming language; Organometallics; Plants (botany); Rotation; Separation; Xylene

Authors

Khudozhitkov Alexander E. ^1,2 , Jobic Hervé ³ , Freude Dieter ⁴ , Haase Juergen ⁴ , Kolokolov Daniil I. ^1,2 , Stepanov Alexander G. ^1,2

Affiliations

1	Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Faculty of Natural Sciences, Department of Physical Chemistry, Pirogova Street 2, Novosibirsk 630090, Russia
3	Institut de Recherches sur la Catalyse et l’Environnement de Lyon, CNRS, Universitéde Lyon, 2 Avenue Albert Einstein, 69626 Villeurbanne, France
4	Universitat Leipzig, Fakultat fur Physik und Geowissenschaften, Linnestraße 5, 04103 Leipzig, Germany

Funding (3)

1	Federal Agency for Scientific Organizations	V.44.2.11.
2	Russian Foundation for Basic Research	14-03-91333
3	German Research Foundation	HA 1893/16

MIL-53 (Al) is an important example of metal–organic frameworks (MOFs) with a flexible framework capable to efficiently separate ortho and para isomers of xylene at moderate temperatures. The MIL-53 MOF contains mobile terephthalate phenylene fragments that can be used as a dynamic probe to investigate the guest–host interactions and the origin of the separation selectivity. Here 2H NMR spin alignment echo technique for the first time was applied to probe ultraslow structural mobility (0.1–1 kHz) in MOFs materials, with particular application to MIL-53(Al) saturated with ortho or para isomers of xylene. A specific influence of different isomers of xylene adsorbed in the MOF pores on the rotation of the phenylenes in MIL-53 for the temperature range with proved separation selectivity (T < 393 K) is shown. It has been established that the rotation of phenylene fragments is sensitive to the type of xylene isomer. The phenylenes’ rotation performs 1 order of magnitude slower in the presence of o-xylene (kortho = 70 s–1) compared to the same rotation in the presence of the other isomer, p-xylene (kpara = 800 s–1) at T ∼ 373 K. This is rationalized by a stronger interaction of the ortho isomer with the linker than the para isomer. This finding offers an understanding of the molecular mechanism of p- and o-xylene separation by MIL-53: stronger interaction of o-xylene with organic linker compared to p-xylene provides separation of these isomers on MIL-53.

Khudozhitkov A.E. , Jobic H. , Freude D. , Haase J. , Kolokolov D.I. , Stepanov A.G.
Ultraslow Dynamics of a Framework Linker in MIL-53 (Al) as a Sensor for Different Isomers of Xylene
The Journal of Physical Chemistry C. 2016. V.120. N38. P.21704-21709. DOI: 10.1021/acs.jpcc.6b08114 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Aug 11, 2016
Accepted:	Aug 26, 2016
Published online:	Sep 9, 2016
Published print:	Sep 29, 2016

Web of science:	WOS:000384626800061
Scopus:	2-s2.0-84989808827
Elibrary:	27571072
Chemical Abstracts:	2016:1414649
Chemical Abstracts (print):	166:36295
OpenAlex:	W2508938413

DB	Citing
Web of science	28
Scopus	28
Elibrary	28
OpenAlex	32