Materials Applications of GUMBOS
Boyd Professor Isiah M. Warner
Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803
My research group has been exploring the analytical applications of room-temperature ionic liquids (RTILs) for several years. Recently, we have extended the range of these materials to include analytical applications of similar solid materials, i.e. organic salts with melting points of solid ionic liquids (25 °C to 100 °C) up to melting points of 250 °C. To contrast these new materials with RTILs, we have created the acronym, GUMBOS (Group of Uniform Materials Based on Organic Salts). These GUMBOS have the tunable properties frequently associated with RTILs, including tunable solubility, melting point, viscosity, thermal stability, and functionality. Thus, when taken in aggregate, these properties allow the production of solid materials which have a wide range of applications in measurement science. In this talk, I will highlight the applications of GUMBOS which we have recently explored for measurement science, including GUMBOS as sensors, imaging agents, stimuli-responsive materials, and for production of nanoGUMBOS. In regard to nanoGUMBOS, we believe that our methodology represents an extremely useful approach to production of nanomaterials since our materials are designed and assembled for specific uses, rather than adapted for use as is done for many nanomaterials. Selected applications, including sensor applications, will be highlighted in this talk. Particular emphasis will be placed on a novel QCM sensor for measurement of volatile organic compounds with simultaneous molecular weight determination.