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

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Chemical Society 2020-08, Vol.142 (31), p.13278-13282
Main Authors: Kim, Jin Yeong, Park, Jaewoo, Ha, Junsu, Jung, Minji, Wallacher, Dirk, Franz, Alexandra, Balderas-Xicohténcatl, Rafael, Hirscher, Michael, Kang, Sung Gu, Park, Jitae T, Oh, In Hwan, Moon, Hoi Ri, Oh, Hyunchul
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.0c04277