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New fluorescent through-space conjugated polymers: synthesis, optical property and explosive detection

Abstract

Through-bond conjugated polymers have been widely studied and shown great potential in various applications for their conductive or luminescent properties, while through-space conjugated polymers are less explored. In this work, a unique through-space conjugated monomer derived from folded tetraphenylethene (TPE) is utilized to build a series of new polymers by Pd-catalyzed Suzuki or Stille coupling reactions. The new polymers are well characterized, and their optical and thermal properties, and potential application in explosive detection are investigated. All the polymers show good thermal stability with high decomposition temperatures (340‒436 °C ). They exhibit higher fluorescence quantum yields in aggregates and films than in solutions, namely they are of aggregation-enhanced emission (AEE) property. They perform well in explosive detection in aqueous media using picric acid as a model. The nanoaggregates of the polymers show large quenching constants of up to 552000 M‒1, which is much larger than those in THF solution (78200 M‒1), demonstrating the superamplification effect of the polymer nanoaggregates in aqueous media. These new through-space conjugated polymers could be a new kind of fluorescent materials and worth further exploration.

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Publication details

The article was received on 06 Oct 2017, accepted on 02 Dec 2017 and first published on 04 Dec 2017


Article type: Paper
DOI: 10.1039/C7PY01700F
Citation: Polym. Chem., 2017, Accepted Manuscript
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    New fluorescent through-space conjugated polymers: synthesis, optical property and explosive detection

    Y. Zhang, P. Shen, B. He, W. Luo, Z. Zhao and B. Z. Tang, Polym. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7PY01700F

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