Interrupted Energy Transfer: Highly Selective Detection of Cyclic Ketones in the Vapor Phase
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s1-ln954374915914716-1939656818Hwf-2123544379IdV1018707485954374PDF_HI0001.pdf
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560.58 KB
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e11a44a3b5a0ecffaee4d3138b5ffd95
Author(s)
Cox, Jason R.
Swager, Timothy M
Mueller, Peter
Date Issued
August 2011
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Cox, Jason R., Peter Müller, and Timothy M. Swager. “Interrupted Energy Transfer: Highly Selective Detection of Cyclic Ketones in the Vapor Phase.” Journal of the American Chemical Society 133.33 (2011): 12910–12913.
Version
Author's final manuscript
Abstract
We detail our efforts toward the selective detection of cyclic ketones, e.g. cyclohexanone, a component of plasticized explosives. Thin films comprised of a conjugated polymer are used to amplify the emission of an emissive receptor via energy transfer. We propose that the energy transfer is dominated by an electron-exchange mechanism to an upper excited state of the fluorophore followed by relaxation and emission to account for the efficient energy transfer in the absence of appreciable spectral overlap. Exposure to cyclic ketones results in a ratiometric fluorescence response. The thin films show orthogonal responses when exposed to cyclic ketones versus acyclic ketones. We demonstrate that the exquisite selectivity is the result of a subtle balance between receptor design and the partition coefficient of molecules into the polymer matrix.
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/ja202277h
