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Issue 6, 2017
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Microwave-assisted synthesis of a viologen-based covalent organic polymer with redox-tunable polarity for dye adsorption

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Abstract

We report the efficient synthesis of a viologen-based covalent organic polymer by a microwave-assisted Menshutkin reaction. The polymer's viologen sub-units were synthesized in the 4,4′-bipyridinium dicationic state but could be reduced to radical-cationic and neutral forms. Regardless of the redox state of its viologens, the polymer was found to be thermally stable and capable of removing three dyes of differing polarities—fluorescein (FL), rhodamine B (RhB), and Nile red (NR)—from aqueous solutions. With its viologens in the dicationic state, the polymer was most efficient at removing FL, which is hydrophilic. With its viologens in the neutral state, it was most efficient at removing NR, which is hydrophobic. This strategy of using a single redox-tunable material for adsorbing multiple contaminants of different polarities represents a unique approach to water purification.

Graphical abstract: Microwave-assisted synthesis of a viologen-based covalent organic polymer with redox-tunable polarity for dye adsorption

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Publication details

The article was received on 04 Nov 2016, accepted on 04 Dec 2016 and first published on 13 Jan 2017


Article type: Paper
DOI: 10.1039/C6RA26332A
RSC Adv., 2017,7, 3594-3598
  • Open access: Creative Commons BY license
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    Microwave-assisted synthesis of a viologen-based covalent organic polymer with redox-tunable polarity for dye adsorption

    G. Das, T. Skorjanc, T. Prakasam, S. Nuryyeva, J. Olsen and A. Trabolsi, RSC Adv., 2017, 7, 3594
    DOI: 10.1039/C6RA26332A

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