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Locating Gases in Porous Materials: Cryogenic Loading of Fuel‐Related Gases Into a Sc‐based Metal–Organic Framework under Extreme Pressures
Author(s) -
Sotelo Jorge,
Woodall Christopher H.,
Allan Dave R.,
Gregoryanz Eugene,
Howie Ross T.,
Kamenev Konstantin V.,
Probert Michael R.,
Wright Paul A.,
Moggach Stephen A.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201506250
Subject(s) - supercritical fluid , metal organic framework , adsorption , porosity , metal , diamond anvil cell , chemical engineering , porous medium , materials science , volume (thermodynamics) , diamond , chemistry , high pressure , composite material , thermodynamics , organic chemistry , metallurgy , physics , engineering
An alternative approach to loading metal organic frameworks with gas molecules at high (kbar) pressures is reported. The technique, which uses liquefied gases as pressure transmitting media within a diamond anvil cell along with a single‐crystal of a porous metal–organic framework, is demonstrated to have considerable advantages over other gas‐loading methods when investigating host–guest interactions. Specifically, loading the metal–organic framework Sc 2 BDC 3 with liquefied CO 2 at 2 kbar reveals the presence of three adsorption sites, one previously unreported, and resolves previous inconsistencies between structural data and adsorption isotherms. A further study with supercritical CH 4 at 3–25 kbar demonstrates hyperfilling of the Sc 2 BDC 3 and two high‐pressure displacive and reversible phase transitions are induced as the filled MOF adapts to reduce the volume of the system.