Specific Isotope-Responsive Breathing Transition in Flexible Metal-Organic Frameworks

Jin Yeong Kim, Jaewoo Park, Junsu Ha, Minji Jung, Dirk Wallacher, Alexandra Franz, Rafael Balderas-Xicohténcatl, Michael Hirscher, Sung Gu Kang, Jitae T. Park, In Hwan Oh, Hoi Ri Moon, Hyunchul Oh

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


An isotope-selective responsive system based on molecular recognition in porous materials has potential for the storage and purification of isotopic mixtures but is considered unachievable because of the almost identical physicochemical properties of the isotopes. Herein, a unique isotope-responsive breathing transition of the flexible metal-organic framework (MOF), MIL-53(Al), which can selectively recognize and respond to only D2 molecules through a secondary breathing transition, is reported. This novel phenomenon is examined using in situ neutron diffraction experiments under the same conditions for H2 and D2 sorption experiments. This work can guide the development of a novel isotope-selective recognition system and provide opportunities to fabricate flexible MOF systems for energy-efficient purification of the isotopic mixture.

Original languageEnglish
Pages (from-to)13278-13282
Number of pages5
JournalJournal of the American Chemical Society
Issue number31
StatePublished - 5 Aug 2020

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSI) (Nos. 2019R1A2C2005162, 2020M2A8A5023553, 2020M2D2A1A02069267, and 2020R1A2C3008908). The neutron source BER II in HZB is gratefully acknowledged for the allocation of neutron scattering beamtime on E9 beamline.

Publisher Copyright:
Copyright © 2020 American Chemical Society.


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