Trace Ethylene Sensing via Wacker Oxidation
Name
acscentsci.0c00022.pdf
Description
Published version
Size
2.25 MB
Format
Adobe PDF
Checksum (MD5)
e7347b7e9bd1c402cc84ea318265bcd1
Author(s)
Fong, Darryl K
Luo, Shao-Xiong
Andre, Rafaela S.
Swager, Timothy M
Date Issued
March 2020
Journal
ACS Central Science
Publisher
American Chemical Society (ACS)
Citation
Fong, Darryl K. et al. "Trace Ethylene Sensing via Wacker Oxidation." ACS Central Science 6, 4 (March 2020): 507–512 © 2020 American Chemical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Terms of Use
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.
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DOI of Published Version
https://doi.org/10.1021/acscentsci.0c00022
