Highly Selective Separation of C2H2 from CO2 by a New Dichromate-Based Hybrid Ultramicroporous Material

A new hybrid ultramicroporous material, [Ni­(1,4-di­(pyridine-2-yl)­benzene)2(Cr2O7)] n (DICRO-4-Ni-i), has been prepared and structurally characterized. Pure gas sorption isotherms and molecular modeling of sorbate–sorbent interactions imply strong selectivity for C2H2 over CO2 (S AC). Dynamic gas...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2017-10, Vol.9 (39), p.33395-33400
Main Authors: Scott, Hayley S, Shivanna, Mohana, Bajpai, Alankriti, Madden, David G, Chen, Kai-Jie, Pham, Tony, Forrest, Katherine A, Hogan, Adam, Space, Brian, Perry IV, John J, Zaworotko, Michael J
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Language:English
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Summary:A new hybrid ultramicroporous material, [Ni­(1,4-di­(pyridine-2-yl)­benzene)2(Cr2O7)] n (DICRO-4-Ni-i), has been prepared and structurally characterized. Pure gas sorption isotherms and molecular modeling of sorbate–sorbent interactions imply strong selectivity for C2H2 over CO2 (S AC). Dynamic gas breakthrough coupled with temperature-programmed desorption experiments were conducted on DICRO-4-Ni-i and two other porous materials reported to exhibit high S AC, TIFSIX-2-Cu-i and MIL-100­(Fe), using a C2H2/CO2/He (10:5:85) gas mixture. Whereas CO2/C2H2 coadsorption by MIL-100­(Fe) mitigated the purity of trapped C2H2, negligible coadsorption and high S AC were observed for DICRO-4-Ni-i and TIFSIX-2-Cu-i.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.6b15250