Ionic Liquid-Tethered Nanoparticle Suspensions: A Novel Class of Ionogels

Surya S. Moganty, Samanvaya Srivastava, Yingying Lu, Jennifer L. Schaefer, Salmaan A. Rizvi, Lynden A. Archer

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

We report a novel class of silica ionogels created by dispersing silica nanoparticles densely grafted with the ionic liquid (IL) 1-trimethoxysilyl propyl-3-methyl-imidazolium bis- (trifluoromethylsulfonyl) imide (SpmImTSFI) in a 1-butyl-3- methyl-pyrrolidinium bis(trifluoromethylsulfonyl) imide (BmpyrTFSI) IL host. We find that over the entire range of nanoparticle volume fractions studied the systems exist as stable suspensions of SiO 2-SpmImTFSI in the BmpyrTFSI host. Remarkably, we also find that addition of even minute quantities of SiO 2-SpmImTFSI to the BmpyrTFSI IL suppresses crystallization of the host. The resulting disordered hybrid fluids exhibit liquid-like transport properties over a vastly extended temperature range; they open the way for facile synthesis of ILs with extended operating temperature windows. These observations are explained in terms of ionic coupling of the nanoparticle-tethered and free TFSI anions, which is thought to suppress crystallization of BmpyrTFSI. © 2012 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1386-1392
Number of pages7
JournalChemistry of Materials
Volume24
Issue number7
DOIs
StatePublished - Mar 27 2012
Externally publishedYes

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