By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Supramolecular Research. According to news reporting from Strasbourg, France, by NewsRx journalists, research stated, "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."
The news correspondents obtained a quote from the research from the University of Strasbourg, "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-EG(13)-N-3, (it) cyclodextrins (alpha and beta 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."
According to the news reporters, the research concluded: "The stability of the resulting film was tested in contact with 8 M urea and during the electrochemical oxidation of ferrocene."
For more information on this research see: Self-Construction of Supramolecular Polyrotaxane Films by an Electrotriggered Morphogen-Driven Process. Langmuir, 2013;29(34):10776-10784. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)
Our news journalists report that additional information may be obtained by contacting G. Rydzek, Univ Strasbourg, CNRS, Inst Chim & Proc Energie Environm & Sante, UMR 7515, F-67087 Strasbourg, France. Additional authors for this research include T. Garnier, P. Schaaf, J.C. Voegel, B. Senger, B. Frisch, Y. Haikel, C. Petit, G. Schlatter, L. Jierry and F. Boulmedais (see also Supramolecular Research).
Keywords for this news article include: France, Europe, Chemistry, Strasbourg, Nanotechnology, Electrochemical, Emerging Technologies, Supramolecular Research
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