August 2009

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Basic Science

Tutorial Review of Ionic Liquid Lubricants

A tutorial review of ionic liquid lubricants prepared by Liu Weimin and his research group of the Lanzhou Institute of Chemical Physics, CAS upon the invitation of Chemical Society Reviews, was published (Feng Zhou, Yongmin Liang, Weimin Liu, Chem. Soc. Rev., 2009, DOI: 10.1039/b817899 m) recently. The latest impact factor of this journal is 17.4. In the past few years, ionic liquid lubricants have attracted considerable attention in the field of tribology; in recent years, the number of papers and patents in this regard has been increasing dramatically. The review summarized research on ionic liquid lubricants for the first time. The author briefly introduced the research of ionic liquid lubricants and the history that they served aerospace and other fields of high technology, described the excellent performance of ionic liquid lubricants as a kind of high-performance lubricant, discussed in more details the present situation of relevant research of different application forms of ionic liquids, such as lubrication oils, additives and thin films, pointed out our problems existing in their practical applications and discussed future direction of the research of ionic liquid lubricants. This article has great reference value for researchers in this field or those, who are willing to enter into this field.

Science: Research on Polanyi

Recently, with the guidance of Prof. Liu Guoping, Dr. Zhang Weiqing wrote a paper entitled ˇ°CH Stretching Excitation in the Early Barrier F + CHD3 Reaction Inhibits CH Bond Cleavageˇ± as the first author during his participation in a joint training program in the Institute of Atomic and Molecular Sciences, Taiwan. This article was published in Science recently. The research group led by Prof. Liu Guoping studied F+CHD3 reaction with the ˇ°time-sliced ion imaging-crossed molecular beam deviceˇ± developed by them. They found for the first time in their experiments that the increase of vibration hinders the overall reaction rate. This shows that C-H stretching excitation effectively controls the kinetic process of reaction. It not only effectively prevents H atom from being seized by F, but also affects the break of CD bond, thus resulting in the change of branching ratio of different vibration states of DF.


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