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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
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
Ceng Z(曾卓); Benjamin S. Phillips; Xiao JC(肖吉昌); Jean'ne M. Shreeve
2008
发表期刊Chem. Mat.
ISSN0897-4756
卷号20期号:8页码:2719-2726
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.
学科领域氟化学
部门归属University of Idaho; Air Force Research Laboratories; 上海有机所
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收录类别SCI
语种英语
WOS记录号WOS:000255019300020
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被引频次:125[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sioc.ac.cn/handle/331003/25231
专题中科院有机氟化学重点实验室
通讯作者Jean'ne M. Shreeve
推荐引用方式
GB/T 7714
Ceng Z,Benjamin S. Phillips,Xiao JC,et al. 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[J]. Chem. Mat.,2008,20(8):2719-2726.
APA 曾卓,Benjamin S. Phillips,肖吉昌,&Jean'ne M. Shreeve.(2008).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.,20(8),2719-2726.
MLA 曾卓,et al."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. 20.8(2008):2719-2726.
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