title: Conductivity and viscosity behavior of asymmetric phosphonium iodides.
abstract: In this work, we report the physicochemical properties of a variety of aliphatic phosphonium iodide (API) salts, including thermal degradation. Also, we compared the conductivity, viscosity, and fragility behavior of APIs to similar molten systems and related these properties to their structure. Our investigation has found that APIs have an intermediate fragility behavior. We plotted the conductivity and viscosity data of APIs according to Walden's rule and found that they can be classified as an associated ionic liquid (AIL), an intermediate between a true ionic liquid and a molecular species. Lastly, we correlated the structure and behavior of APIs and similar polarizable anions, such as the diacetamide anion.
authors.affiliation: Laboratorio de Materiales para el Almacenamiento y Conversión de Energía, Facultad de Ciencias Químicas, Universidad Autonoma de Nuevo León, Cd. Universitaria, San Nicolás de los Garza N.L. México 66450.
authors.forename: Rosa E
authors.initials: RE
authors.lastname: Ramírez
authors.forename: Luis C
authors.initials: LC
authors.lastname: Torres-González
authors.forename: Aracely
authors.initials: A
authors.lastname: Hernández
authors.forename: Alejandro
authors.initials: A
authors.lastname: García
authors.forename: Eduardo M
authors.initials: EM
authors.lastname: Sánchez