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Studies from National Institute for Materials Science in the Area of Biological Pigments Described (Surface-assisted Dehydrogenative Homocoupling of...

August 12, 2014

Studies from National Institute for Materials Science in the Area of Biological Pigments Described (Surface-assisted Dehydrogenative Homocoupling of Porphine Molecules)

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators discuss new findings in Biological Factors. According to news reporting originating from Ibaraki, Japan, by NewsRx correspondents, research stated, "The templated synthesis of porphyrin dimers, oligomers, and tapes has recently attracted considerable interest. Here, we introduce a clean, temperature-induced covalent dehydrogenative coupling mechanism between unsubstituted free-base porphine units yielding dimers, trimers, and larger oligomers directly on a Ag(111) support under ultrahigh-vacuum conditions."

Our news editors obtained a quote from the research from National Institute for Materials Science, "Our multitechnique approach, including scanning tunneling microscopy, near-edge X-ray absorption fine structure and photoelectron spectroscopy complemented by theoretical modeling, allows a comprehensive characterization of the resulting nanostructures and sheds light on the coupling mechanism. We identify distinct coupling motifs and report a decrease of the electronic gap and a modification of the frontier orbitals directly associated with the formation of triply fused dimeric species."

According to the news editors, the research concluded: "This new on-surface homocoupling protocol yields covalent porphyrin nanostructures addressable with submolecular resolution and provides prospective model systems towards the exploration of extended oligomers with tailored chemical and physical properties."

For more information on this research see: Surface-assisted Dehydrogenative Homocoupling of Porphine Molecules. Journal of the American Chemical Society, 2014;136(26):9346-9354. Journal of the American Chemical Society can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Journal of the American Chemical Society -

The news editors report that additional information may be obtained by contacting A. Wiengarten, Natl Inst Mat Sci NIMS, Int Center Young Scientists ICYS MANA, Tsukuba, Ibaraki 3050047, Japan. Additional authors for this research include K. Seufert, W. Auwarter, D. Ecija, K. Diller, F. Allegretti, F. Bischoff, S. Fischer, D.A. Duncan, A.C. Papageorgiou, F. Klappenberger, R.G. Acres, T.H. Ngo and J.V. Barth (see also Biological Factors).

Keywords for this news article include: Asia, Japan, Ibaraki, Porphyrins, Nanostructural, Nanostructures, Nanotechnology, Biological Factors, Biological Pigments, Emerging Technologies

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Source: Life Science Weekly

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