Structural Dynamics in a "Breathing" Metal-Organic Framework Studied by Electron Paramagnetic Resonance of Nitroxide Spin Probes

Structural Dynamics in a "Breathing" Metal-Organic Framework Studied by Electron Paramagnetic Resonance of Nitroxide Spin Probes Full article

Journal

The Journal of Physical Chemistry Letters
ISSN: 1948-7185

Output data

Year: 2014, Volume: 5, Number: 1, Pages: 20-24 Pages count : DOI: 10.1021/jz402357v

Tags

EPR spectroscopy; guest-host interactions; spin probes; structural hysteresis; TEMPO

Authors

Sheveleva Alena M. ^1,2 , Kolokolov Daniil I. ^2,3 , Gabrienko Anton A. ³ , Stepanov Alexander G. ^2,3 , Gromilov Sergey A. ⁴ , Shundrina Inna K. ⁵ , Sagdeev Renad Z. ¹ , Fedin Matvey V. ¹ , Bagryanskaya Elena G. ^1,5

Affiliations

1	(Данные Web of science) Int Tomog Ctr SB RAS, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Novosibirsk 630090, Russia
3	(Данные Web of science) Boreskov Inst Catalysis SB RAS, Novosibirsk 630090, Russia
4	(Данные Web of science) Nikolaev Inst Inorgan Chem SB RAS, Novosibirsk 630090, Russia
5	(Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem SB RAS, Novosibirsk 630090, Russia

Reversible structural rearrangements ("breathing") of metal-organic frameworks (MOFs) are interesting and complex phenomena with many potential applications. They are often triggered by small amounts of adsorbed guest molecules; therefore, the guest-host interactions in breathing MOFs are intensively investigated. Due to the sensitivity limitations, most analytical methods require relatively high concentrations of guests in these studies. However, because guest molecules are not "innocent", breathing behavior may become suppressed and unperturbed structural states inaccessible. We propose here the use of guest nitroxide molecules in tiny concentrations (such as 1 molecule per 1000 unit cells), which serve as spin probes for electron paramagnetic resonance (EPR), for effective study of breathing phenomena in MOFs. Using a perspective MIL-53(Al) framework as an example, we demonstrate the great advantage of this general approach, which avoids perturbation of the framework structure and allows in-depth investigation of guest-host interactions in the breathing mode.

Sheveleva A.M. , Kolokolov D.I. , Gabrienko A.A. , Stepanov A.G. , Gromilov S.A. , Shundrina I.K. , Sagdeev R.Z. , Fedin M.V. , Bagryanskaya E.G.
Structural Dynamics in a "Breathing" Metal-Organic Framework Studied by Electron Paramagnetic Resonance of Nitroxide Spin Probes
The Journal of Physical Chemistry Letters. 2014. V.5. N1. P.20-24. DOI: 10.1021/jz402357v WOS Scopus РИНЦ

Published online:	Dec 6, 2013
Published print:	Jan 2, 2014

Web of science	WOS:000329331400004
Scopus	2-s2.0-84891823036
Elibrary	21862686
OpenAlex	W2026540327