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Truxene-based hyperbranched conjugated polymers: fluorescent micelles detect explosives in water

We report two hyperbranched conjugated polymers (HCP) with truxene units as core and 1,4-didodecyl-2,5-diethynylbenzene as well as 1,4-bis(dodecyloxy)-2,5-diethynylbenzene as comonomers. Two analogous poly(para-phenyleneethynylene)s (PPE) are also prepared as comparison to demonstrate the difference...

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Main Authors: Huang, Wei (Author) , Smarsly, Emanuel (Author) , Han, Jinsong (Author) , Bender, Markus (Author) , Seehafer, Kai (Author) , Wacker, Irene (Author) , Schröder, Rasmus R. (Author) , Bunz, Uwe H. F. (Author)
Format: Article (Journal)
Language:English
Published: 13 January 2017
In: ACS applied materials & interfaces
Year: 2017, Volume: 9, Issue: 3, Pages: 3068-3074
ISSN:1944-8252
DOI:10.1021/acsami.6b12419
Online Access:Verlag, Volltext: http://dx.doi.org/10.1021/acsami.6b12419
Verlag, Volltext: https://doi.org/10.1021/acsami.6b12419
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Author Notes:Wei Huang, Emanuel Smarsly, Jinsong Han, Markus Bender, Kai Seehafer, Irene Wacker, Rasmus R. Schröder, and Uwe H.F. Bunz
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Summary:We report two hyperbranched conjugated polymers (HCP) with truxene units as core and 1,4-didodecyl-2,5-diethynylbenzene as well as 1,4-bis(dodecyloxy)-2,5-diethynylbenzene as comonomers. Two analogous poly(para-phenyleneethynylene)s (PPE) are also prepared as comparison to demonstrate the difference between the truxene and the phenyl moieties in their optical properties and their sensing performance. The four polymers are tested for nitroaromatic analytes and display different fluorescence quenching responses. The quenching efficiencies are dependent upon the spectral overlap between the absorbance of the analyte and the emission of the fluorescent polymer. Optical fingerprints are obtained, based on the unique response patterns of the analytes toward the polymers. With this small sensor array, one can distinguish nine nitroaromatic analytes with 100% accuracy. The amphiphilic polymer F127 (a polyethylene glycol-polypropylene glycol block copolymer) carries the hydrophobic HCPs and self-assembles into micelles in water, forming highly fluorescent HCP micelles. The micelle-bound conjugated polymers detect nitroaromatic analytes effectively in water and show an increased sensitivity compared to the sensing of nitroaromatics in organic solvents. The nitroarenes are also discriminated in water using this four-element chemical tongue.
Item Description:Gesehen am 13.09.2018
Physical Description:Online Resource
ISSN:1944-8252
DOI:10.1021/acsami.6b12419

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