Ionic Liquids in Fluid Applications

爱达荷大学化学系Jean'ne M. Shreeve在无机、生物无机和有机金属化学项目的支持下，合成和研究了含有全氟烷基或多氟烷基醚基团的新型离子液体。咪唑、三唑和四唑阳离子将用各种强烷基化剂处理，以提供单、二和多全氟烷基化离子液体。多齿中心或模板，包括磷腈、三嗪、大环胺、联吡啶和聚合磷腈和嘧啶也将被全氟化或多氟烷基化，以获得新型的氟化离子液体。与现有的非氟化离子液体相比，氟化离子液体有望具有更高的密度、更高的热稳定性、更高的抗氧化性和可控制的粘度。离子液体或熔盐是挥发性有机化合物作为溶剂的有吸引力的替代品。离子液体的理想性能包括广泛的使用温度范围，低蒸汽压，热稳定性和化学稳定性，粘度和密度可调。它们还被用作低温/高温流体、极端环境中的润滑剂和燃料电池中的电解质。本项目将开发一类新型氟化离子液体。本科生、研究生和博士后研究人员将学习宝贵的技术技能，并获得实验设计和新材料应用于现实世界需求的经验。该项目还支持向两年制和四年制大学教员提供外联服务。

Jean'ne M. Shreeve, Department of Chemistry, University of Idaho, is supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program to synthesize and study new ionic liquids containing perfluoroalkyl or polyfluoroalkyl ether groups. Imidazolium, triazolium and tetrazolium cations will be treated with various strong alkylating agents to provide mono-, di- and poly-perfluoroalkylated ionic liquids. Polydentate centers or templates, including phosphazenes, triazines, macrocyclic amines, bipyridines and polymeric phosphazenes and azines will also be perfluoro- or polyfluoroalkylated to give new types of fluorinated ionic liquids. The fluorinated ionic liquids are expected to have higher densities, higher thermal stabilities, higher oxidation resistance and controlled viscosities than current non-fluorinated ionic liquids.Ionic liquids, or molten salts, are attractive alternatives to volatile organic compounds as solvents. The desirable properties of ionic liquids include a wide useful temperature range, low vapor pressure, thermal and chemical stability with tunable viscosity and density. They are also being explored as low/high temperature fluids, lubricants in extreme environments and as electrolytes in fuel cells. This project will develop a new class of fluorinated ionic liquids. Undergraduate, graduate student and postdoctoral researchers will learn valuable technical skills and gain experience in experimental design and application of new materials to real world needs. This project also supports outreach efforts to two-year and four-year college faculty.