Self-Construction of Supramolecular Polyrotaxane Films by an Electrotriggered Morphogen-Driven Process
| Autor: | Guy Schlatter, Fouzia Boulmedais, Loïc Jierry, Bernard Senger, Jean-Claude Voegel, Gaulthier Rydzek, Corinne Petit, Tony Garnier, Pierre Schaaf, Youssef Haikel, Benoît Frisch |
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| Rok vydání: | 2013 |
| Předmět: |
Rotaxanes
Adamantane Aucun Supramolecular chemistry Poloxamer Microscopy Atomic Force chemistry methods chemistry.chemical_compound Polymer chemistry Electrochemistry Organic chemistry General Materials Science Electrodes Spectroscopy Acrylic acid chemistry.chemical_classification Cyclodextrins Molecular Structure Surfaces and Interfaces Polymer Condensed Matter Physics Ferrocene Click chemistry Click Chemistry Azide Ethylene glycol |
| Zdroj: | Langmuir. 29:10776-10784 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la402454e |
| Popis: | The design of films using a one-pot process has recently attracted increasing interest in the field of polymer thin film formation. Herein we describe the preparation of one-pot supramolecular polyrotaxane (PRX) films using the morphogen-driven self-construction process. This one-pot buildup strategy where the film growth is triggered by the electrochemical formation and diffusion of a catalyst in close vicinity of the substrate has recently been introduced by our group. A one-pot mixture was used that contained (i) poly(acrylic acid) (PAA) functionalized by azide groups grafted on the polymer chain through oligo(ethylene glycol) (EG) arms, leading to PAA-EG13-N3, (ii) cyclodextrins (α and β CD), as macrocycles that can be threaded along EG arms, (iii) alkyne-functionalized stoppers (ferrocene or adamantane), to cap the PRX assembly by click chemistry, and (iv) copper sulfate. The one-pot mixture solution was brought into contact with a gold electrode. Cu(I), the morphogen, was generated electrochemically from Cu(II) at the electrode/one-pot solution interface. This electrotriggered click reaction leads to the capping of polypseudorotaxane yielding to PRXs. The PRXs can self-assemble through lateral supramolecular interactions to form aggregates and ensure the cohesion of the film. The film buildup was investigated using different types of CD and alkyne functionalized stoppers. Supramolecular PRX aggregates were characterized by X-ray diffraction measurements. The film topographies were imaged by atomic force microscopy. The influence of the concentration in CD and the presence of a competitor were studied as well. The stability of the resulting film was tested in contact with 8 M urea and during the electrochemical oxidation of ferrocene. journal article research support, non-u.s. gov't 2013 Aug 27 2013 08 13 imported |
| Databáze: | OpenAIRE |
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