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

100 Scopus citations


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
Issue number7
StatePublished - Mar 27 2012
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-018-02
Acknowledgements: This work was supported by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST), and by the National Science Foundation, Award No. DMR-1006323. J.S. acknowledges support from a National Science Foundation Energy & Sustainability IGERT fellowship program at Cornell.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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