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Porous carbon materials with improved hydrogen storage capacity by carbonizing Zn(BDC)TED0.5. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Berdichevsky EK, Downing VA, Hooper RW, Butt NW, McGrath DT, Donnelly LJ, Michaelis VK, Katz MJ. Ultrahigh Size Exclusion Selectivity for Carbon Dioxide from Nitrogen/Methane in an Ultramicroporous Metal-Organic Framework. Inorg Chem 2022; 61:7970-7979. [PMID: 35523004 DOI: 10.1021/acs.inorgchem.2c00608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Separations based on molecular size (molecular sieving) are a solution for environmental remediation. We have synthesized and characterized two new metal-organic frameworks (MOFs) (Zn2M; M = Zn, Cd) with ultramicropores (<0.7 nm) suitable for molecular sieving. We explore the synthesis of these MOFs and the role that the DMSO/H2O/DMF solvent mixture has on the crystallization process. We further explore the crystallographic data for the DMSO and methanol solvated structures at 273 and 100 K; this not only results in high-quality structural data but also allows us to better understand the structural features at temperatures around the gas adsorption experiments. Structurally, the main difference between the two MOFs is that the central metal in the trimetallic node can be changed from Zn to Cd and that results in a sub-Å change in the size of the pore aperture, but a stark change in the gas adsorption properties. The separation selectivity of the MOF when M = Zn is infinite given the pore aperture of the MOF can accommodate CO2 while N2 and/or CH4 is excluded from entering the pore. Furthermore, due to the size exclusion behavior, the MOF has an adsorption selectivity of 4800:1 CO2/N2 and 5 × 1028:1 CO2/CH4. When M = Cd, the pore aperture of the MOF increases slightly, allowing N2 and CH4 to enter the pore, resulting in a 27.5:1 and a 10.5:1 adsorption selectivity, respectively; this is akin to UiO-66, a MOF that is not able to function as a molecular sieve for these gases. The data delineate how subtle sub-Å changes to the pore aperture of a framework can drastically affect both the adsorption selectivity and separation selectivity.
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Affiliation(s)
- Ellan K Berdichevsky
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
| | - Victoria A Downing
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
| | - Riley W Hooper
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Nathan W Butt
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
| | - Devon T McGrath
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
| | - Laurie J Donnelly
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
| | - Vladimir K Michaelis
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Michael J Katz
- Department of Chemistry, Memorial University of Newfoundland, 230 Elizabeth Avenue, St. John's, Newfoundland and Labrador A1C 5S7, Canada
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McGrath DT, Ryan MD, MacInnis JJ, VandenBoer TC, Young CJ, Katz MJ. Selective decontamination of the reactive air pollutant nitrous acid via node-linker cooperativity in a metal-organic framework. Chem Sci 2019; 10:5576-5581. [PMID: 31293741 PMCID: PMC6553375 DOI: 10.1039/c9sc01357a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 04/26/2019] [Indexed: 12/19/2022] Open
Abstract
The environmental pollutant nitrous acid is rapidly and selectively sorbed and converted to benign products in the metal–organic framework UiO-66-NH2.
Nitrous acid (HONO) is a reservoir of NOx and an emerging pollutant having direct impacts on air quality, both in- and outdoors, as well as on human health. In this work, the amine-functionalized metal–organic framework (MOF), UiO-66-NH2, was investigated due to its potential to selectively decontaminate nitrous acid at environmentally relevant concentrations. UiO-66-NH2 proved to be effective in the removal of nitrous acid from a continuous gaseous stream. This is observed via the formation of an aryl diazonium salt that subsequently converts to a phenol with a concomitant release of nitrogen gas. This process is preceded via the formation of the nitrosonium cation (likely protonation from an acidic proton on the node). Thus, UiO-66-NH2 is capable of selectively converting the pollutant nitrous acid to benign products.
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Affiliation(s)
- Devon T McGrath
- Department of Chemistry , Memorial University of Newfoundland , St. John's , NL , Canada .
| | - Michaela D Ryan
- Department of Chemistry , Memorial University of Newfoundland , St. John's , NL , Canada .
| | - John J MacInnis
- Department of Chemistry , Memorial University of Newfoundland , St. John's , NL , Canada .
| | - Trevor C VandenBoer
- Department of Earth Sciences , Memorial University of Newfoundland , St. John's , NL , Canada.,Department of Chemistry , York University , Toronto , ON , Canada
| | - Cora J Young
- Department of Chemistry , Memorial University of Newfoundland , St. John's , NL , Canada . .,Department of Chemistry , York University , Toronto , ON , Canada
| | - Michael J Katz
- Department of Chemistry , Memorial University of Newfoundland , St. John's , NL , Canada .
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