New achievement of JACS of Xi Zhenfeng / Zhang Wenxiong research lab, Peking University: high efficiency activation and transformation of nitrogen
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Last Update: 2019-03-28
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Source: Internet
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Author: User
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Nitrogen is the most important component of air, accounting for more than 78% of air volume ratio It is the most abundant and cheapest nitrogen source, which can be described as inexhaustible However, nitrogen molecule is one of the most stable molecules, which can realize the efficient activation and transformation of nitrogen under mild conditions, so as to directly synthesize nitrogen-containing organic compounds without ammonia It is the "Holy Grail" designed by nature for scientists The synergistic effect of transition metals and ligands is one of the ways to realize the efficient activation and transformation of nitrogen under mild conditions Although some important progress has been made in this field, the efficiency is very low and the reaction mechanism is not clear For example, it is known that the combination of chromium and some ligands can catalyze the reaction of N 2 and me 3 SiCl to form n (sime 3) 3, but the intermediates of the reaction are unknown and the catalytic mechanism is unknown, which limits the further optimization and application of the catalytic reaction Recently, Xi Zhenfeng / Zhang Wenxiong Research Office of Peking University used a kind of multifunctional phosphine cyclopentadiene ligands (inorg Chem Front 2019, 6, 428) developed before to form a novel polynuclear cr-n2 complex with Cr, and obtained its active reaction intermediate for the first time This work provides a new way for the design of ligands in nitrogen fixation chemistry and the activation mode of nitrogen molecules by the interaction of multifunctional ligands and polynuclear transition metals The research results were published in J am Chem SOC (DOI: 10.1021 / JACS 9b00822) under the title of "dinitrogen functionalization after chromium hydrazido complex" Yin Jianhao, Ph.D., Li Jiapeng, Ph.D., and Wang Gaoxiang, Ph.D., were co authors The research was supported by the school of chemistry, Peking University, the National Research Center for molecular science and NSFC.
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