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“Click” Synthesis and Redox Activity of a Water-Soluble Triazolylcobalticinium Polyelectrolyte

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Abstract

Ionic macromolecules, i.e. polyelectrolytes are of academic and industrial interest due to their poly-charged structures and applications. Here a polyelectrolyte containing redox-active cobalticinium groups is synthesized by CuI-catalyzed azide alkyne Huisgen-type regioselective 1,3-cycloaddition, which is also-called “click” synthesis between a poly(azidomethylstyrene) polymer and ethynylcobalticinium. Overall, this first triazolylcobalticinium polymer is easily prepared in only three steps, which opens the way for applications such as redox sensing in aqueous media, polymer encapsulation of hydrophobic biomedical molecules in water and stabilization of colloidal suspensions. Cyclic voltammetry shows chemically and electrochemically reversible reductions on the electrochemical time scale, to the neutral 19-electron cobaltocene polymer and to the unstable 20-electron anionic structure. Application of Bard’s equation using the decamethylferrocene reference allows estimating that the number of electrons transferred in the first cyclic voltammetry wave is 29 ± 3, close to the number of cobalticinium units, 31 ± 2, determined by size exclusion chromatography.

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Acknowledgments

Helpful assistance and discussions with Nicolas Guidolin (SEC), Claire Mouche (mass spectrometry) and Jean-Michel Lanier (NMR) from the CESAMO, Université Bordeaux 1, and financial support from the Université Bordeaux 1, the Centre National de la Recherche Scientifique (CNRS), the Agence Nationale de la Recherche (ANR) and the China Scholarship Council (Ph.D. grant to Y. W.) is gratefully acknowledged.

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Authors and Affiliations

  1. ISM, UMR CNRS N°5255, Univ. Bordeaux, 33405, Talence Cedex, France

    Amalia Rapakousiou, Yanlan Wang, Jaime Ruiz & Didier Astruc

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  1. Amalia Rapakousiou
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  2. Yanlan Wang
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  3. Jaime Ruiz
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  4. Didier Astruc
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Correspondence to Didier Astruc.

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Dedicated to the memory of our esteemed colleague Professor Dwight A. Sweigart.

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Rapakousiou, A., Wang, Y., Ruiz, J. et al. “Click” Synthesis and Redox Activity of a Water-Soluble Triazolylcobalticinium Polyelectrolyte. J Inorg Organomet Polym 24, 107–113 (2014). https://doi.org/10.1007/s10904-013-9958-y

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