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Pyrrolidinium imides : a new family of molten salts and conductive plastic crystal phases
journal contribution
posted on 1999-05-20, 00:00 authored by D MacFarlane, P Meakin, J Sun, N Amini, Maria ForsythMaria ForsythA new family of molten salts is reported, based on the N-alkyl, N-alkyl pyrrolidinium cation and the bis(trifluoromethane sulfonyl)imide anion. Some of the members of the family are molten at room temperature, while the smaller and more symmetrical members have melting points around 100 °C. Of the room-temperature molten salt examples, the methyl butyl derivative exhibits the highest conductivity; at 2 × 10-3 S/cm this is the highest molten salt conductivity observed to date at room temperature among the ammonium salts. This highly conductive behavior is rationalized in terms of the role of cation planarity. The salts also exhibit multiple crystalline phase behavior below their melting points and exhibit significant conductivity in at least their higher temperature crystal phase. For example, the methyl propyl derivative (mp = 12 °C) shows ion conductivity of 1 × 10-6 S/cm at 0 °C in its higher temperature crystalline phase.
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Journal
Journal of physical chemistry B : condensed matter, materials, surfaces, interfaces and biophysicalVolume
103Issue
20Pagination
4164 - 4170Publisher
American Chemical SocietyLocation
Washington, D.C.Publisher DOI
ISSN
1520-6106eISSN
1520-5207Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
1999, American Chemical SocietyUsage metrics
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