New progress in organic synthesis of new carbon based nanomaterials

  Release date: September 19, 2016 reading times: 147

 Recently, the research team of Supramolecular Photochemistry of Institute of physical and chemical technology of Chinese Academy of Sciences, together with researchers from Fudan University and Peking University, has made new progress in the precise construction of new carbon based nano materials by means of photochemistry and organic chemistry synthesis.The related research results have been published in the Journal of American Chemical Society.Large scale and accurate preparation of carbon based nanomaterials has always been an important scientific issue in the field of material synthesis, which provides an innovative opportunity to give full play to the advantages of organic chemistry in the synthesis of complex carbon containing molecules.

    In this study, the rigid bending structure of anthracene photodimer was used as the central synthesis unit, and the highly twisted aromatic bicycles with the shape of "8" were synthesized efficiently by means of transition metal promoted coupling reaction and other methods; then, the reversible anthracene dimerization reaction was used to realize ring expansion under heating conditions, and the non planar aromatic ring system was constructed and the carbon nano ring was accurately synthesizedMolecule.

    Cong Huan, the corresponding author of the paper and a researcher of the Institute of physics and chemistry who also led the research, told China Science Daily that their experimental and theoretical research results showed that the carbon nano ring molecules can rapidly convert between the structural units of the spiral and armchair carbon nanotubes at room temperature.These two conjugated nanomolecules were synthesized for the first time, and they have unique photoelectric properties and high quantum efficiency, which laid a good foundation for further synthesis and optimization of material properties.

   Cong Huan explained that the core structural features and synthesis difficulties of this kind of organic synthesis new carbon based nano materials lie in the fact that the original plane aromatic ring is bent by organic synthesis and becomes a macrocyclic molecule.

"Such a structure makes molecules have unique properties in photochemistry and electrochemistry, such as high fluorescence quantum yield, which can be further studied as organic semiconductors and photoelectric materials."In addition, Conghuan said that the precise synthesis of carbon nanotubes is still an important scientific issue in the field of materials science. As the smallest structural unit of carbon nanotubes, such molecules have been prepared in a large amount in a controllable way, which has laid a good foundation for the research group to further study the synthesis of more complex carbon based nanomaterials by organic synthesis methods, and even the precise synthesis of carbon nanotubesAs the foundation.