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Figure 1. Accurate construction of new carbon-based nanomaterials using photochemical and organic chemistry synthesis methods
Figure 2. The theoretically preferred conformation of nanoring molecule 2 as a structural unit of carbon nanotubes
Recently, the supermolecule photochemical research team of the Institute of Physics and Chemistry, Chinese Academy of Sciences combined with researchers from Fudan University and Peking University took advantage of photochemical and organic chemistry synthesis methods to make new progress in the accurate construction of new carbon-based nanomaterials.
The large-scale and accurate preparation of carbon-based nanomaterials is an important scientific issue in the field of material synthesis, which provides an innovative opportunity to exploit the advantages of organic chemistry in the synthesis of complex carbon-containing molecules. This research originally made use of the rigid bending structure of the dioptric dimer as a central synthesis unit to efficiently synthesize a highly twisted aromatic bicyclic molecule 1 having a number 8 shape by means of a coupling reaction promoted by a transition metal; The reversibility of the reaction is achieved by heating the ring, completing the construction of the non-planar aromatic ring system and precisely synthesizing the carbon nanoring molecule 2 (Figure 1). Experimental and theoretical studies have shown that Molecule 2 can rapidly convert between the structural units of spiral and armchair carbon nanotubes at room temperature (Figure 2). The above two conjugated nanomolecules are synthesized for the first time, and have unique photoelectric properties and high light quantum efficiency, which lays a good foundation for further synthesis work and optimization of material properties.
Related research results have been published in the International Chemical Journal "Synthesis of Oligoparaphenylene-Derived Nanohoops Employing an Anthracene Photodimerization-Cycloreversion Strategy, J. Am. Chem. Soc. 2016, 138, DOI: 10.1021/jacs.6b07673". . Physicochemical researcher Cong Huan was the author of the paper and led the research work; Yang Xiaodi of Fudan University worked as a co-correspondence author for theoretical calculations; Dr. Huang Zengao of the Conghua Group was the first author of the paper.
The relevant research work has received strong support from the Energy Chemistry Pilot Project of the Chinese Academy of Sciences, the National Natural Science Foundation of China, the Youth Talents Project of the “One Thousand Talents Program†of the Central Organization Department, and the fund of the Institute of Physics and Chemistry.
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