Thermal and structural studies of imidazolium-based ionic liquids with and without liquid-crystalline phases: the origin of nanostructure

The Journal of Physical Chemistry. B
Fumiya NemotoOsamu Yamamuro

Abstract

To clarify the origin of the nanostructure of ionic liquids (ILs), we have investigated two series of ILs 1-alkyl-3-methylimidazolium hexafluorophosphate (CnmimPF6, n = 4-16, n is an alkyl-carbon number) and 1-alkyl-3-methylimidazolium chloride (CnmimCl, n = 4-14) using differential scanning calorimetry and X-ray diffraction techniques. The PF6 samples with n > 13 and the Cl samples with n > 10 exhibited the liquid-crystalline (LC) to liquid (L) phase transitions, as reported before. We found that both samples with smaller n also exhibited the LC to L transitions under supercooled states as far as the ionic motions were not frozen-in at the glass transition temperatures Tg. The Tg of the LC phase was close to that of the L phase, indicating that the characteristic length of the glass transition is shorter than that of the nanostructure. A low-Q peak due to the nanostructure in the L phase and a diffraction peak due to the layer structure in the LC phase appeared at almost the same Q positions in both samples. On the basis of the above results and some thermodynamic analysis, we argue that the nanostructures of ILs are essentially the same as the layer structures in the LC phases.

References

Sep 1, 2005·Journal of the American Chemical Society·Yanting Wang, Gregory A Voth
Aug 25, 2006·The Journal of Physical Chemistry. B·José N Canongia LopesAgílio A H Pádua
Mar 29, 2007·The Journal of Physical Chemistry. B·Alessandro TrioloEmanuela Di Cola
Nov 17, 2010·The Journal of Physical Chemistry. B·Harsha V R AnnapureddyClaudio J Margulis
Mar 17, 2011·The Journal of Chemical Physics·Bachir AounMarie-Louise Saboungi
Jul 22, 2011·Physical Chemistry Chemical Physics : PCCP·Johan ScheersPer Jacobsson
Aug 10, 2011·The Journal of Chemical Physics·Osamu YamamuroMichihiro Nagao
Jan 12, 2013·The Journal of Physical Chemistry. B·Yumeng JiGiacomo Saielli
Feb 9, 2013·The Journal of Physical Chemistry. B·Maiko KofuOsamu Yamamuro
Mar 28, 2013·The Journal of Organic Chemistry·Lucas A Daily, Kevin M Miller
Aug 7, 2013·The Journal of Physical Chemistry. B·Marisa A A RochaLuís M N B F Santos
Dec 24, 2013·The Journal of Physical Chemistry. B·Karina ShimizuJosé N Canongia Lopes
Jun 4, 2014·Physical Chemistry Chemical Physics : PCCP·Yong Zhang, Edward J Maginn
Feb 1, 2015·Chemical Science·Matthew T CloughOliver P Whitaker

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Citations

Dec 24, 2015·The Journal of Chemical Physics·Maiko KofuOsamu Yamamuro
Apr 3, 2016·The Journal of Chemical Physics·Jeevapani J HettigeClaudio J Margulis
Aug 6, 2015·The Journal of Physical Chemistry. B·Juan C AraqueClaudio J Margulis
Nov 13, 2015·Physical Chemistry Chemical Physics : PCCP·Xueming Yuan, Gang Cheng
Dec 22, 2016·The Journal of Physical Chemistry. B·Henning WeissMarkus Mezger
Sep 30, 2017·Physical Chemistry Chemical Physics : PCCP·Julian MarsMarkus Mezger
Apr 24, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Hiroshi AbeKiyoto Matsuishi
Apr 28, 2018·Physical Chemistry Chemical Physics : PCCP·Toshiyuki TakamukuHiroki Iwase
Sep 28, 2017·Faraday Discussions·Christopher P CabryJohn M Slattery
Jun 22, 2019·Physical Chemistry Chemical Physics : PCCP·Benjamin DoughtyVera Bocharova
Aug 6, 2020·The Journal of Chemical Physics·Kalil BernardinoEdward J Maginn
Aug 23, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Arun Yethiraj
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Dhruve Kumar MitalAlnoman Taha
Apr 2, 2019·The Journal of Physical Chemistry. B·Jesse G McDaniel, Arun Yethiraj
Apr 16, 2020·Chemical Reviews·Yong-Lei WangMichael D Fayer

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