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Polymers 2017, 9(4), 118;

Pentiptycene-Derived Fluorescence Turn-Off Polymer Chemosensor for Copper(II) Cation with High Selectivity and Sensitivity

Department of Chemistry, Binghamton University, State University of New York, Binghamton, NY 13902, USA
Department of Chemistry, Augustana University, Sioux Falls, SD 57197, USA
Author to whom correspondence should be addressed.
Academic Editor: Po-Chih Yang
Received: 2 March 2017 / Revised: 20 March 2017 / Accepted: 21 March 2017 / Published: 24 March 2017
(This article belongs to the Special Issue Polymers for Chemosensing)
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Fluorescent conjugated polymers (FCPs) have been explored for selective detection of metal cations with ultra-sensitivity in environmental and biological systems. Herein, a new FCP sensor, tmeda-PPpETE (poly[(pentiptycene ethynylene)-alt-(thienylene ethynylene)] with a N,N,N′-trimethylethylenediamino receptor), has been designed and synthesized via Sonogashira cross-coupling reaction with the goal of improving solid state polymer sensor development. The polymer was found to be emissive at λmax ~ 459 nm under UV radiation with a quantum yield of 0.119 at room temperature in THF solution. By incorporating diamino receptors and pentiptycene groups into the poly[(phenylene ethynylene)-(thiophene ethynylene)] (PPETE) backbone, the polymer showed an improved turn-off response towards copper(II) cation, with more than 99% quenching in fluorescence emission. It is capable of discriminating copper(II) cation from sixteen common cations, with a detection limit of 16.5 nM (1.04 ppb). View Full-Text
Keywords: fluorescence; conjugated polymers; pentiptycene; chemical sensor; copper sensor fluorescence; conjugated polymers; pentiptycene; chemical sensor; copper sensor

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Chen, A.; Wu, W.; Fegley, M.E.A.; Pinnock, S.S.; Duffy-Matzner, J.L.; Bernier, W.E.; Jones, W.E. Pentiptycene-Derived Fluorescence Turn-Off Polymer Chemosensor for Copper(II) Cation with High Selectivity and Sensitivity. Polymers 2017, 9, 118.

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