News Column

New Biological Pigments Study Results Reported from CEA Saclay

June 3, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Biological Factors. According to news originating from Gif sur Yvette, France, by NewsRx correspondents, research stated, "The development of innovative techniques for the functionalization of carbon nanotubes that preserve their exceptional quality, while robustly enriching their properties, is a central issue for their integration in applications. In this work, we describe the formation of a covalent network of porphyrins around MWNT surfaces."

Our news journalists obtained a quote from the research from CEA Saclay, "The approach is based on the adsorption of cobalt(II) meso-tetraethynylporphyrins on the nanotube sidewalls followed by the dimerization of the triple bonds via Hay-coupling; during the reaction, the nanotube acts as a template for the formation of the polymeric layer. The material shows an increased stability resulting from the cooperative effect of the multiple pi-stacking interactions between the porphyrins and the nanotube and by the covalent links between the porphyrins. The nanotube hybrids were fully characterized and tested as the supported catalyst for the oxygen reduction reaction (ORR) in a series of electrochemical measurements under. acidic conditions."

According to the news editors, the research concluded: "Compared to similar systems in which monomeric porphyrins are simply physisorbed, MWNT-CoP hybrids showed a higher ORR activity associated with a number of exchanged electrons close to four, corresponding to the complete reduction of oxygen into water."

For more information on this research see: Carbon Nanotube-Templated Synthesis of Covalent Porphyrin Network for Oxygen Reduction Reaction. Journal of the American Chemical Society, 2014;136(17):6348-6354. Journal of the American Chemical Society can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of the American Chemical Society - www.pubs.acs.org/journal/jacsat)

The news correspondents report that additional information may be obtained from I. Hijazi, CEA Saclay, IRAMIS, NIMBE, Lab Innovat Chim Surfaces & Nanosci LICSEN, F-91191 Gif Sur Yvette, France. Additional authors for this research include T. Bourgeteau, R. Cornut, A. Morozan, A. Filoramo, J. Leroy, V. Derycke, B. Jousselme and S. Campidelli (see also Biological Factors).

Keywords for this news article include: France, Europe, Chalcogens, Fullerenes, Porphyrins, Gif sur Yvette, Carbon Nanotubes, Biological Factors, Biological Pigments

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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