Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores
The mechanism of proton conductivity in porous solids (i.e., Grotthuss or vehicular) is related to the structure and chemical environment of the pores. Direct observation of structure-function relationships is difficult because state-of-the-art solid proton conductors are often amorphous. Here, we p...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Chemical Society (ACS)
2020
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| Online Access: | https://hdl.handle.net/1721.1/126155 |
| _version_ | 1826200703858638848 |
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| author | Park, Sarah Sunah Rieth, Adam Joseph Hendon, Christopher H Dinca, Mircea |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Park, Sarah Sunah Rieth, Adam Joseph Hendon, Christopher H Dinca, Mircea |
| author_sort | Park, Sarah Sunah |
| collection | MIT |
| description | The mechanism of proton conductivity in porous solids (i.e., Grotthuss or vehicular) is related to the structure and chemical environment of the pores. Direct observation of structure-function relationships is difficult because state-of-the-art solid proton conductors are often amorphous. Here, we present a systematic elucidation of two distinct proton transport pathways within MIT-25, a mesoporous metal-organic framework that exhibits parallel channels of ∼27 Å and ∼4.5 Å width. We characterize transport through these pores using temperature- and humidity-dependent proton conductivity measurements and density functional theory. Through control of vapor pressure we are able to sequentially fill the small and large pores, promoting proton conductivity with distinct activation energies at low and high relative humidity, respectively. |
| first_indexed | 2024-09-23T11:40:33Z |
| format | Article |
| id | mit-1721.1/126155 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:40:33Z |
| publishDate | 2020 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1261552022-09-27T21:10:24Z Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores Park, Sarah Sunah Rieth, Adam Joseph Hendon, Christopher H Dinca, Mircea Massachusetts Institute of Technology. Department of Chemistry The mechanism of proton conductivity in porous solids (i.e., Grotthuss or vehicular) is related to the structure and chemical environment of the pores. Direct observation of structure-function relationships is difficult because state-of-the-art solid proton conductors are often amorphous. Here, we present a systematic elucidation of two distinct proton transport pathways within MIT-25, a mesoporous metal-organic framework that exhibits parallel channels of ∼27 Å and ∼4.5 Å width. We characterize transport through these pores using temperature- and humidity-dependent proton conductivity measurements and density functional theory. Through control of vapor pressure we are able to sequentially fill the small and large pores, promoting proton conductivity with distinct activation energies at low and high relative humidity, respectively. U.S. Department of Energy, Office of Basic Energy Sciences (grant no. DE-SC0018235) NSF (grant no. ACI-1053575) NSF GRFP (grant no. 1122374) 2020-07-13T16:21:17Z 2020-07-13T16:21:17Z 2018-02 2019-12-17T13:21:13Z Article http://purl.org/eprint/type/JournalArticle 1520-5126 https://hdl.handle.net/1721.1/126155 Park, Sarah S., et al. "Selective Vapor Pressure Dependent Proton Transport in a Metal-Organic Framework with Two Distinct Hydrophilic Pores." Journal of the American Chemical Society 140, 6 (Feb. 2018): p. 2016-19 doi 10.1021/JACS.7B12784 ©2018 Author(s) en 10.1021/JACS.7B12784 Journal of the American Chemical Society Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) MIT web domain |
| spellingShingle | Park, Sarah Sunah Rieth, Adam Joseph Hendon, Christopher H Dinca, Mircea Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title | Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title_full | Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title_fullStr | Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title_full_unstemmed | Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title_short | Selective Vapor Pressure Dependent Proton Transport in a Metal–Organic Framework with Two Distinct Hydrophilic Pores |
| title_sort | selective vapor pressure dependent proton transport in a metal organic framework with two distinct hydrophilic pores |
| url | https://hdl.handle.net/1721.1/126155 |
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