The reporter learned from the University of Science and Technology of China that the research team of Professor Du Pingwu used a new strategy to construct a sawtooth carbon nanotube segment for the first time.
Carbon nanotubes are a kind of nano-materials, light in weight, and hexagonal structure is perfectly connected. The C=C covalent bond constituting carbon nanotubes is one of the most stable chemical bonds in nature, but the carbon nanotubes of single length and size are synthesized. It is an important challenge in synthetic chemistry and material chemistry.
From the perspective of precise structure control, the bottom-up approach is one of the ideal strategies for controlling the preparation of carbon nanotubes, and can be used as an ideal precursor or template for the preparation of carbon nanotubes. However, another major Types—The study of precursors or templates for sawtooth carbon nanotubes is very limited. Rational design and construction of carbon nanotube fragments can be used as an ideal precursor or template for the preparation of ultrapure carbon nanotubes, and their skeletons are π-conjugated. Extension, it is expected to obtain new functional materials close to carbon nanotubes in structure and properties.
Based on the preliminary work, the research group connected the curved fused ring conjugated precursor by the coupling reaction of transition metal palladium and nickel, and successfully synthesized the zigzag carbon nanotubes with two graphene units as the capped 'hat'. Conjugated fragments, for the first time, proposed a strategy for longitudinally cutting carbon nanotube building motifs. Combined with theoretical simulations, the selective supramolecular interactions with fullerene C70 were studied and found to be 1:1 between C70 and C70. Selective combination of phenomena.
This method of connecting two graphene units through three curved molecules can directly obtain nano-cage structures, which provides a new idea for the construction of end-capped zigzag carbon nanotubes. The research results have been published in German Applied Chemistry.
