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Efficient gas separation and transport mechanism in rare hemilabile metal-organic framework

DOI: 10.1021/acs.chemmater.9b01995 DOI Help

Authors: Marta Mon (Universidad de Valencia) , Rosaria Bruno (Università della Calabria) , Estefanía Tiburcio (Universidad de Valencia) , Aida Grau-atienza (Universidad de Alicante) , Antonio Sepulveda-escribano (Universidad de Alicante) , Enrique V Ramos-fernandez (Universidad de Alicante) , Alessio Fuoco (ITM-CNR) , Elisa Esposito (ITM-CNR) , Marcello Monteleone (ITM-CNR) , Johannes Carolus Jansen (ITM-CNR) , Joan Cano (Universidad de Valencia) , Jesus Ferrando-soria (Universidad de Valencia) , Donatella Armentano (Università della Calabria) , Emilio Pardo (Universidad de Valencia)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry Of Materials

State: Published (Approved)
Published: July 2019
Diamond Proposal Number(s): 18768

Abstract: Understand/visualize the established interactions between gases and adsorbents is mandatory to implement better per-formant materials in adsorption/separation processes. Here we report the unique behavior of a rare example of a hemila-bile chiral three-dimensional metal-organic framework (MOF) with an unprecedented qtz-e-type topology, with formula CuII2(S,S)-hismox . 5H2O (1) (hismox = bis[(S)-histidine]oxalyl diamide). 1 exhibits a continuous and reversible breath-ing behavior, based on the hemilability of carboxylate groups from L-histidine. In-situ powder (PXRD) and single crystal X-ray diffraction (SCXRD) using synchrotron radiation allowed to unveil the crystal structures of 4 different host-guest adsorbates (Ar, N2, CO2 and C3H6@1), the rationalization of the breathing motion and unravel the mechanisms govern-ing the adsorption of these gases. Then, this information has been transferred to implement efficient separations of mix-tures of industrial and environmental relevance –CO2/N2, CO2/CH4 and C3H8/C3H6 using 1 in packed columns as the sta-tionary phase and dispersed in a mixed matrix membrane.

Subject Areas: Chemistry, Materials


Instruments: I19-Small Molecule Single Crystal Diffraction

Other Facilities: ALBA