Metallocalix[4]arene Polymers for Gravimetric Detection of N- Nitrosodialkylamines
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nihms-1770880.pdf
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Accepted version
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1.1 MB
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Author(s)
Lu, Ru-Qiang
Yuan, Weize
Croy, Robert G
Essigmann, John M
Swager, Timothy M
Date Issued
2021
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Lu, Ru-Qiang, Yuan, Weize, Croy, Robert G, Essigmann, John M and Swager, Timothy M. 2021. "Metallocalix[4]arene Polymers for Gravimetric Detection of N- Nitrosodialkylamines." Journal of the American Chemical Society, 143 (47).
Version
Author's final manuscript
Abstract
N-Nitrosamines are found in food, drugs, air, water, and soil. They pose a significant risk to human health because of their carcinogenicity; consequently, materials that can be used to selectively and sensitively detect nitrosamines are needed. In this work, we designed and synthesized two polymers bearing calix[4]arene or 4-tert-butylcalix[4]arene tungsten-imido complexes (PCalixH and PCalixtBu) as N-nitrosodimethylamine (NDMA) receptors. The interaction between metallocalix[4]arene monomers/polymers and NDMA was confirmed by 1H NMR and IR spectroscopy. Single-crystal X-ray analysis further revealed that the host-guest interaction is based on binding of the terminal oxygen of NDMA to tungsten within the calixarene cavity. Gravimetric detection of NDMA was performed on a quartz crystal microbalance (QCM) in air. Both polymers show responses to NDMA, with PCalixtBu exhibiting a low theoretical limit of detection of 5 ppb for NDMA. The sensor also shows high selectivity toward NDMA and moderate humidity tolerance. This work provides a sensitive sensor for detection of NDMA and also offers a class of new, selective, and efficient NDMA receptors for the future design of NDMA sensors and NDMA extraction materials.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Center for Environmental Health Sciences
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DOI of Published Version
https://doi.org/10.1021/JACS.1C08739
