Trace Ethylene Sensing via Wacker Oxidation
Ethylene is a dynamic plant hormone, and its temporal monitoring can be used to glean insight into plant health and status. However, the real-time distributed detection of ethylene at trace levels under ambient conditions remains a challenge. We report a single-walled carbon nanotube-based chemiresi...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Chemical Society (ACS)
2020
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| Online Access: | https://hdl.handle.net/1721.1/128218 |
| _version_ | 1811083036865855488 |
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| author | Fong, Darryl K Luo, Shao-Xiong Andre, Rafaela S. Swager, Timothy M |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Fong, Darryl K Luo, Shao-Xiong Andre, Rafaela S. Swager, Timothy M |
| author_sort | Fong, Darryl K |
| collection | MIT |
| description | Ethylene is a dynamic plant hormone, and its temporal monitoring can be used to glean insight into plant health and status. However, the real-time distributed detection of ethylene at trace levels under ambient conditions remains a challenge. We report a single-walled carbon nanotube-based chemiresistor catalyst combination that can detect ppb levels of ethylene in air. Cycling between Pd(II) and Pd(0) via Wacker oxidation with a nitrite cocatalyst imparts response discrimination driven by the chemoselectivity of the chemical transformation. Sensitivity is controlled by a combination of the chemical reaction efficiency and the n-doping strength of the Pd(0) species generated in situ. The covalent functionalization of the carbon nanotube sidewall with pyridyl ligands drastically improves the device sensitivity via enhanced n-doping. The utility of this ethylene sensor is demonstrated in the monitoring of senescence in red carnations and purple lisianthus flowers. |
| first_indexed | 2024-09-23T12:19:01Z |
| format | Article |
| id | mit-1721.1/128218 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:19:01Z |
| publishDate | 2020 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1282182022-09-28T01:00:56Z Trace Ethylene Sensing via Wacker Oxidation Fong, Darryl K Luo, Shao-Xiong Andre, Rafaela S. Swager, Timothy M Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Ethylene is a dynamic plant hormone, and its temporal monitoring can be used to glean insight into plant health and status. However, the real-time distributed detection of ethylene at trace levels under ambient conditions remains a challenge. We report a single-walled carbon nanotube-based chemiresistor catalyst combination that can detect ppb levels of ethylene in air. Cycling between Pd(II) and Pd(0) via Wacker oxidation with a nitrite cocatalyst imparts response discrimination driven by the chemoselectivity of the chemical transformation. Sensitivity is controlled by a combination of the chemical reaction efficiency and the n-doping strength of the Pd(0) species generated in situ. The covalent functionalization of the carbon nanotube sidewall with pyridyl ligands drastically improves the device sensitivity via enhanced n-doping. The utility of this ethylene sensor is demonstrated in the monitoring of senescence in red carnations and purple lisianthus flowers. U.S. Army Engineer Research and Development Center Environmental Quality Technology Program (Contract W912HZ-17-2-0027) National Science Foundation (Grant DMR-1809740) 2020-10-27T20:55:59Z 2020-10-27T20:55:59Z 2020-03 2020-01 2020-09-22T15:31:45Z Article http://purl.org/eprint/type/JournalArticle 2374-7943 2374-7951 https://hdl.handle.net/1721.1/128218 Fong, Darryl K. et al. "Trace Ethylene Sensing via Wacker Oxidation." ACS Central Science 6, 4 (March 2020): 507–512 © 2020 American Chemical Society en http://dx.doi.org/10.1021/acscentsci.0c00022 ACS Central Science 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) ACS |
| spellingShingle | Fong, Darryl K Luo, Shao-Xiong Andre, Rafaela S. Swager, Timothy M Trace Ethylene Sensing via Wacker Oxidation |
| title | Trace Ethylene Sensing via Wacker Oxidation |
| title_full | Trace Ethylene Sensing via Wacker Oxidation |
| title_fullStr | Trace Ethylene Sensing via Wacker Oxidation |
| title_full_unstemmed | Trace Ethylene Sensing via Wacker Oxidation |
| title_short | Trace Ethylene Sensing via Wacker Oxidation |
| title_sort | trace ethylene sensing via wacker oxidation |
| url | https://hdl.handle.net/1721.1/128218 |
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