题名: Polyfluoroalkyl, polyethylene glycol, 1,4-bismethylenebenzene or 1,4-bismethylene-2,3,5,6-tetrafluorobenzene bridged functionalized dicationic ionic liquids: Synthesis and properties as high temperature lubricants
作者: Ceng Z(曾卓) ; Benjamin S. Phillips ; Xiao JC(肖吉昌) ; Jean'ne M. Shreeve
刊名: Chem. Mat.
出版日期: 2008
卷号: 20, 期号:8, 页码:2719-2726
其他题名: 多氟烷基、缩乙二醇、对苯二亚甲基、2,3,5,6-四氟-1,4-对苯二亚甲基桥连的双阳离子类离子液体的合成及高稳润滑性能
通讯作者: Jean'ne M. Shreeve
英文摘要: A new class of geminal dicationic ionic liquids was formed with a bridging moiety, such as a polyalkyl ether, polyfluoroalkyl, 1,4-bismethylenebenzene, or 1,4-bismethylene-2,3,5,6-tetrafluorobenzene link, between alkyl-substituted imidazolium rings. Their properties were modified by varying the linker chains and/or alkyl substituents on the imidazolium ring. The polyfluoroalkyl bridged dicationic ionic liquids exhibit the highest densities and viscosities. Although melting points are directly proportional to the length of the alkyl substituent, the densities decrease concomitantly. With 1,4-bismethylene-2,3,5,6-tetrafluorobenzene as the linking chain and with longer alkyl substituents on the imidazolium rings, the nonpolar character of the ionic liquid greatly increases, e.g., the solubilities in toluene of dicationic ionic liquids 36 and 37, where the ring substituents are C10H21 and C14H29, increase markedly. Some of the salts exhibit higher conductivities than an equimolar tetrabutylammonium iodide solution in acetonitrile/ toluene. These new ionic liquids (except with PF6- as anion) display outstanding tribological properties in temperature ramp tests by performing very well at 300 degrees C, thus meeting one criterion for high-temperature lubricants.
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000255019300020
Citation statistics:
内容类型: 期刊论文
URI标识: [http://202.127.28.38/handle/331003/25231]  
Appears in Collections:中科院有机氟化学重点实验室_期刊论文


Recommended Citation:
曾卓; Benjamin S. Phillips; 肖吉昌; Jean'ne M. Shreeve.Polyfluoroalkyl, polyethylene glycol, 1,4-bismethylenebenzene or 1,4-bismethylene-2,3,5,6-tetrafluorobenzene bridged functionalized dicationic ionic liquids: Synthesis and properties as high temperature lubricants,Chem. Mat.,2008,20(8):2719-2726
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