Journal ArticleDOI
Specialist gelator for ionic liquids.
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TLDR
FT-IR spectroscopy indicated that a driving force for gelation was intermolecular hydrogen bonding between amides and that the phase transition from gel to liquid upon heating was brought about by the collapse of hydrogen bonding.Abstract:
Cyclo(l-beta-3,7-dimethyloctylasparaginyl-L-phenylalanyl) (1) and cyclo(L-beta-2-ethylhexylasparaginyl-L-phenylalanyl) (2), prepared from L-asparaginyl-L-phenylalanine methyl ester, have been found to be specialist gelators for ionic liquids. They can gel a wide variety of ionic liquids, including imizazolium, pyridinium, pyrazolidinium, piperidinium, morpholinium, and ammonium salts. The mean minimum gel concentrations (MGCs) necessary to make gels at 25 degrees C were determined for ionic liquids. The gel strength increased at a rate nearly proportional to the concentration of added gelator. The strength of the transparent gel of 1-butylpyridinium tetrafluoroborate ([C(4)py]BF(4)), prepared at a concentration of 60 g L(-1) (gelator 1/[C(4)py]BF(4)), was ca. 1500 g cm(-2). FT-IR spectroscopy indicated that a driving force for gelation was intermolecular hydrogen bonding between amides and that the phase transition from gel to liquid upon heating was brought about by the collapse of hydrogen bonding. The gels formed from ionic liquids were very thermally stable; no melting occurs up to 140 degrees C when the gels were prepared at a concentration of 70 g L(-1) (gelator/ionic liquid). The ionic conductivities of the gels were nearly the same as those of pure ionic liquids. The gelator had electrochemical stability and a wide electrochemical window. When the gels were prepared from ionic liquids containing propylene carbonate, the ionic conductivities of the resulting gels increased to levels rather higher than those of pure ionic liquids. The gelators also gelled ionic liquids containing supporting electrolytes.read more
Citations
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Ionogels, ionic liquid based hybrid materials
TL;DR: In this critical review, ionogels are presented as a new class of hybrid materials, in which the properties of the IL are hybridized with those of another component, which may be organic, inorganic or hybrid organic-inorganic, which opens new routes for designing advanced materials, especially (bio)catalytic membranes, sensors and drug release systems.
Journal ArticleDOI
Advanced applications of ionic liquids in polymer science
Jianmei Lu,Feng Yan,John Texter +2 more
TL;DR: Ionic liquids (ILs) are continuing as important media in which to effect various kinds of polymerizations, and it is particularly noteworthy that ionic polymerization are being developed in IL solvents and that atom transfer radical polymerization (ATRP) catalysts are being attached to ILs to make them more easily recoverable in living polymerizations as mentioned in this paper.
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Electrolyte-gated transistors for organic and printed electronics
Se Hyun Kim,Kihyon Hong,Wei Xie,Keun Hyung Lee,Sipei Zhang,Timothy P. Lodge,C. Daniel Frisbie +6 more
TL;DR: Recent progress in the development of electrolyte-gated transistors (EGTs) for organic and printed electronics is summarized and key developments in electrolyte materials for use in printed electronics are reviewed.
Journal ArticleDOI
New frontiers in materials science opened by ionic liquids.
TL;DR: Recent studies on ILs that are employed as functional advanced materials, advanced mediums for materials production, and components for preparing highly functional materials are reviewed.
Journal ArticleDOI
Applications of ionic liquids in electrochemical sensors
Di Wei,Ari Ivaska +1 more
TL;DR: This review focuses on the application of ILs in electroanalytical sensors, which have been found to have good biocompatibility with enzymes, proteins and even living cells.
References
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Journal ArticleDOI
Dissolution of Cellose with Ionic Liquids
TL;DR: In this paper, the authors demonstrate that cellulose can be dissolved without activation or pretreatment in, and regenerated from, 1-butyl-3-methylimidazolium chloride and other hydrophilic ionic liquids.
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Hydrophobic, Highly Conductive Ambient-Temperature Molten Salts
Pierre Bonhote,Ana-Paula Dias,Nicholas Papageorgiou,Kuppuswamy Kalyanasundaram,Michael Grätzel +4 more
TL;DR: New, hydrophobic ionic liquids with low melting points (<−30 °C to ambient temperature) have been synthesized and investigated, based on 1,3-dialkyl imidazolium cations and hydrophilic anions and thus water-soluble.
Journal ArticleDOI
Ionic Liquids--Solvents of the Future?
TL;DR: Rogers and Seddon as discussed by the authors reviewed recent progress on developing new ionic liquid solvents for use in chemical synthesis, catalysis, fuel cells, and other applications.