By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Hydrogen. According to news originating from Shanghai, People's Republic of China, by NewsRx correspondents, research stated, "A powerful strategy to obtain complex supramolecular materials is the bottom-up construction of noncovalently bound materials by hierarchical self-assembly. This assembly process involves step-wise, uniform increases to the architectural complexity of a substrate, starting from discrete precursors and growing in dimensionality through controlled reactivity to a final product."
Our news journalists obtained a quote from the research from East China Normal University, "Herein, two orthogonal processes are exploited: coordination-driven self-assembly and hydrogen bonding. The former relies on the predictable formation of metal-ligand bonds wherein the directionalities of the rigid precursors used determines the structural outcome. The latter uses 2-ureido-4-pyrimidinone interfaces that are structurally robust by virtue of the quadruple hydrogen bonding that can occur between subunits. By combining these two processes into a single system, it is possible to generate hierarchical materials that preserve the attractive tunability associated with discrete supramolecular coordination complexes. For instance, the synthesis of a one-dimensional chain comprising linked metalla-rhomboids is readily adapted to a 2D cross-linked hexagonal network by simply selecting a different metal acceptor precursor as an assembly component. The specific interactions between subunits, in this case platinum(II)-pyridyl bonds and the quadruple H-bonding of ureidopyrimidinone, are unchanged, establishing a unique strategy to obtain supramolecular polymers with marked topological differences with minimal synthetic redesign. In addition, the structural rigidity imposed by the inclusion of the platinum metallacycles serves to minimize the formation of cyclic oligomers, increasing the efficacy of formation and improving the properties of the resultant materials."
According to the news editors, the research concluded: "Furthermore, this study taps the potential of organoplatinum(II) metallacycles in materials science."
For more information on this research see: Supramolecular polymers with tunable topologies via hierarchical coordination-driven self-assembly and hydrogen bonding interfaces. Proceedings of the National Academy of Sciences of the United States of America, 2013;110(39):15585-15590. Proceedings of the National Academy of Sciences of the United States of America can be contacted at: Natl Acad Sciences, 2101 Constitution Ave NW, Washington, DC 20418, USA. (National Academy of Sciences - www.nasonline.org/; Proceedings of the National Academy of Sciences of the United States of America - www.nasonline.org/publications/pnas/)
The news correspondents report that additional information may be obtained from X.Z. Yan, E China Normal Univ, Dept. of Phys, Shanghai Key Lab Magnet Resonance, Shanghai 200062, People's Republic of China. Additional authors for this research include S.J. Li, J.B. Pollock, T.R. Cook, J.Z. Chen, Y.Y. Zhang, X.F. Ji, Y.H. Yu, F.H. Huang and P.J. Stang (see also Hydrogen).
Keywords for this news article include: Asia, Gases, Shanghai, Elements, Hydrogen, Nanotechnology, Supramolecular, Inorganic Chemicals, Emerging Technologies, People's Republic of China
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