Cavitand-Functionalized SWCNTs for N-Methylammonium Detection
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Author(s)
Dionisio, Marco
Schnorr, Jan Markus
Michaelis, Vladimir K.
Griffin, Robert Guy
Dalcanale, Enrico
Swager, Timothy M
Date Issued
April 2012
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Dionisio, Marco et al. “Cavitand-Functionalized SWCNTs for N-Methylammonium Detection.” Journal of the American Chemical Society 134.15 (2012): 6540–6543.
Version
Author's final manuscript
Abstract
Single-walled carbon nanotubes (SWCNTs) have been functionalized with highly selective tetraphosphonate cavitand receptors. The binding of charged N-methylammonium species to the functionalized SWCNTs was analyzed by X-ray photoelectron spectroscopy and confirmed by [superscript 31]P MAS NMR spectroscopy. The cavitand-functionalized SWCNTs were shown to function as chemiresistive sensory materials for the detection of sarcosine and its ethyl ester hydrochloride in water with high selectivity at concentrations as low as 0.02 mM. Exposure to sarcosine and its derivative resulted in an increased conductance, in contrast to a decreased conductance response observed for potential interferents such as the structurally related glycine ethyl ester hydrochloride.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1021/ja301174m
