Angelw: the research group of Professor Shi Zhuangzhi of Nanjing University has developed a new "bottom-up" controllable synthesis method of graphene fragments
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Last Update: 2018-05-03
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Source: Internet
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Author: User
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The polycyclic aromatic hydrocarbons based on graphene are characterized by high electron density, narrow gap between the highest occupied orbit (HOMO) and the lowest unoccupied orbit (LUMO), low redox potential, strong π - π stacking ability, aromaticity and excellent chemical stability Recently, Professor Shi Zhuangzhi, National Key Laboratory of coordination chemistry, School of chemistry and chemical engineering, Nanjing University, has used palladium catalyzed C-H activation technology to realize the dimerization and cyclization of ioxarenes Through the strategy of "later aromatization", a "bottom-up" controllable synthesis method of graphene fragments has been developed This achievement was published online on angew Chem Int ed (DOI: 10.1002 / anie 201803603) with the title of "bottom up construction of graphane segments based on a palladium catalyzed annual division of o-iodobarylcompounds" Relevant technologies have applied for patent protection Two complementary strategies to construct graphene fragments (source: School of chemistry and chemical engineering, Nanjing University) it is worth noting that Professor Itami of Nagoya University, Japan, reported a similar method to construct graphene fragments on Science (2018, 359, 435) earlier The main difference between the two routes is the sequence of arylation and the strategy of "pre arylation" adopted by Professor Itami The products produced by the two methods are complementary According to the number (n) of aromatic borate benzene rings, theoretically, the number (N) of the infinite extension length of the product side wall is odd (2n+1) and even (2n+2), respectively The first author of this achievement is Zhu ChenDan, a 2015 doctoral student The above research work has been greatly supported by the "youth thousand talents" program of the Central Organization Department, the National Natural Science Foundation, the "entrepreneurship and Innovation Program" of Jiangsu Province, and the National Key Laboratory of coordination chemistry.
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