Precise Measurement and Controlled Tuning of Effective Window Sizes in ZIF-8 Framework for Efficient Separation of Xylenes

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Precise Measurement and Controlled Tuning of Effective Window Sizes in ZIF-8 Framework for Efficient Separation of Xylenes. / Polyukhov, Daniil M.; Poryvaev, Artem S.; Gromilov, Sergey A. et al.

In: Nano Letters, Vol. 19, No. 9, 11.09.2019, p. 6506-6510.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e3112e82109b4472a7402bc55f89cf3a,

title = "Precise Measurement and Controlled Tuning of Effective Window Sizes in ZIF-8 Framework for Efficient Separation of Xylenes",

abstract = "Metal-organic frameworks (MOFs) are the promising nanomaterials for separation of molecules with close dimensions and structures, such as various types of isomers. The efficiency of separation can be greatly enhanced if the apertures of the nanosized windows, controlling the diffusion of a particular molecule inside the cavities, are fine-tuned by external stimuli. We report the new approach for precise measurement of window sizes in ZIF-8 MOF and employ it in efficient separation of xylenes, which is of high practical importance. For this sake, we synthesized ZIF-8 with embedded stable nitroxides in the pores and applied electron paramagnetic resonance spectroscopy for in situ kinetic measurement of the diffusion of various guest molecules through the material. Slight variation of temperature within 298-333 K allowed tuning of the windows and reaching optimum conditions for separation of p-, m-, and o-xylenes with the efficiency up to 92-95%. The developed methodology provides deeper understanding of steric and kinetic aspects of molecular diffusion in ZIF-8 and paves the way to rational optimization of other MOF-based separation applications.",

keywords = "EPR, flexibility, MOF, separation of xylenes, window aperture, ZIF-8",

author = "Polyukhov, {Daniil M.} and Poryvaev, {Artem S.} and Gromilov, {Sergey A.} and Fedin, {Matvey V.}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = sep,

day = "11",

doi = "10.1021/acs.nanolett.9b02730",

language = "English",

volume = "19",

pages = "6506--6510",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "9",

}

RIS

TY - JOUR

T1 - Precise Measurement and Controlled Tuning of Effective Window Sizes in ZIF-8 Framework for Efficient Separation of Xylenes

AU - Polyukhov, Daniil M.

AU - Poryvaev, Artem S.

AU - Gromilov, Sergey A.

AU - Fedin, Matvey V.

PY - 2019/9/11

Y1 - 2019/9/11

N2 - Metal-organic frameworks (MOFs) are the promising nanomaterials for separation of molecules with close dimensions and structures, such as various types of isomers. The efficiency of separation can be greatly enhanced if the apertures of the nanosized windows, controlling the diffusion of a particular molecule inside the cavities, are fine-tuned by external stimuli. We report the new approach for precise measurement of window sizes in ZIF-8 MOF and employ it in efficient separation of xylenes, which is of high practical importance. For this sake, we synthesized ZIF-8 with embedded stable nitroxides in the pores and applied electron paramagnetic resonance spectroscopy for in situ kinetic measurement of the diffusion of various guest molecules through the material. Slight variation of temperature within 298-333 K allowed tuning of the windows and reaching optimum conditions for separation of p-, m-, and o-xylenes with the efficiency up to 92-95%. The developed methodology provides deeper understanding of steric and kinetic aspects of molecular diffusion in ZIF-8 and paves the way to rational optimization of other MOF-based separation applications.

AB - Metal-organic frameworks (MOFs) are the promising nanomaterials for separation of molecules with close dimensions and structures, such as various types of isomers. The efficiency of separation can be greatly enhanced if the apertures of the nanosized windows, controlling the diffusion of a particular molecule inside the cavities, are fine-tuned by external stimuli. We report the new approach for precise measurement of window sizes in ZIF-8 MOF and employ it in efficient separation of xylenes, which is of high practical importance. For this sake, we synthesized ZIF-8 with embedded stable nitroxides in the pores and applied electron paramagnetic resonance spectroscopy for in situ kinetic measurement of the diffusion of various guest molecules through the material. Slight variation of temperature within 298-333 K allowed tuning of the windows and reaching optimum conditions for separation of p-, m-, and o-xylenes with the efficiency up to 92-95%. The developed methodology provides deeper understanding of steric and kinetic aspects of molecular diffusion in ZIF-8 and paves the way to rational optimization of other MOF-based separation applications.

KW - EPR

KW - flexibility

KW - MOF

KW - separation of xylenes

KW - window aperture

KW - ZIF-8

UR - http://www.scopus.com/inward/record.url?scp=85072134096&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.9b02730

DO - 10.1021/acs.nanolett.9b02730

M3 - Article

C2 - 31449756

AN - SCOPUS:85072134096

VL - 19

SP - 6506

EP - 6510

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 9

ER -

ID: 21539639