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Komatsu's research center focused its research on creating substances that did not exist in nature. The core research object is a substance having a π-conjugated structure represented by a benzene ring. The most recent representative result is the inclusion of hydrogen molecules (H2) in the derivatives of C60, which is the representative of fullerenes, by assistant Murata Jiroda and first-year doctoral student Murata Murata.
In this work, molecular surgery was used to enlarge the annulus by inserting sulfur atoms (S) between carbon atoms (C) and carbon atoms using chemical reactions. By the way, according to Komatsu, Yves Rubin, a professor at the U.S. UCLA (University of California, Los Angeles), who is closely affiliated with and engaged in research in the same field, used the term "Molecular Surgery" for the first time.
The molecular surgery process performed by Murata in the above two individuals was as follows: (1) The triazine compound was first reacted with C60 to expand the six-membered ring into an eight-membered ring; (2) The resulting product was placed in oxygen. Irradiation of ultraviolet rays expands the eight-membered ring into a twelve-membered ring; (3) Using S8 (sulfur) and TDAE (organic tetrakis(dimethylamino)ethylene) to expand the twelve-membered ring into a thirteen-membered ring; (4) Enclosed Hydrogen molecules (H2); (5) Irradiated lasers close the ring holes. In (1) (2) (3), about 40% of the entire C60 derivative produced a ring hole, and hydrogen molecules were encapsulated one by one in the entire C60 derivative that produced the ring hole (FIG. 1). Details of the trial have been published on the June 18, 2003 issue of the Journal of the American Chemical Society, published by the American Chemical Society.
In order to analyze the hydrogen storage properties of the C60 derivatives, the half-life index of half of the leaked hydrogen molecules was measured. The measurement results are: 4.2 hours, 9 hours, 21.3 hours, and 54.4 hours at 190°C, 180°C, 170°C, and 160°C, respectively, and the half-life is represented by an Arrhenius Plot line. The test has been nearly 5 months so far, and there is no reduction in hydrogen at room temperature. From this, it can be seen that if the above measurement results are correct, it can be deduced that the half-life at room temperature (20° C.) is 1019 years, and that hydrogen can be actually stored almost semi-permanently. Komatsu told the reporter that "The molecular weight of the C60 derivative is 1066, and the molecular weight of hydrogen is 2. Therefore, only from the comparison of the molecular weight, theoretically, only 0.2% of hydrogen can be stored in the C60 derivative, but if used at room temperature, If the performance is stable and hydrogen is released when the temperature rises to around 200°C, it may have a certain use in areas such as automotive fuel cells."
The Komatsu Research Laboratory also recently developed a new molecule called the molecular tripod based on a professor from Kitagawa Min. This molecule, headed by a functional molecular unit, combines three molecular units containing sulfur atoms at one end. Since there are sulfur atoms at the foot of this molecule, it is not only easy to combine with metal surfaces such as gold, but also is more stable than single-molecule molecular units and can determine the binding direction. Therefore, Beichuan hopes it can be applied to new electronic components and high-precision biological chips, etc. In the field. In addition, the details of the molecular tripod are currently preparing related papers, "Recently Cannot Be Published" (Beichuan). In addition, the Komatsu Research Laboratory is currently based on the assistant Xichangheng, and is developing new types of ions formed around the π-electron cyclic molecular unit to enhance the σ skeleton.
Japan uses "molecular surgery" to develop new functional materials
Professor Komatsu, Institute of Chemistry, Kyoto University, Japan One of the research labs has developed a variety of new functional materials in succession by using "molecular surgery" (the use of surgical methods in the molecular structure of organic matter, combining different molecules). The research institute recently received extensive attention from experts both in Japan and abroad because it first removed a part of carbon fullerenes and succeeded in packing hydrogen molecules. In an interview with this reporter, Professor Komatsu disclosed that a new structure called a molecular tripod has been successfully developed.