Extraordinary Slowing of Structural Dynamics in Thin Films of a Room Temperature Ionic Liquid

ACS Central Science
Jun NishidaM D Fayer

Abstract

The role that interfaces play in the dynamics of liquids is a fundamental scientific problem with vast importance in technological applications. From material science to biology, e.g., batteries to cell membranes, liquid properties at interfaces are frequently determinant in the nature of chemical processes. For most liquids, like water, the influence of an interface falls off on a ∼1 nm distance scale. Room temperature ionic liquids (RTILs) are a vast class of unusual liquids composed of complex cations and anions that are liquid salts at room temperature. They are unusual liquids with properties that can be finely tuned by selecting the structure of the cation and anion. RTILs are being used or developed in applications such as batteries, CO2 capture, and liquids for biological processes. Here, it is demonstrated quantitatively that the influence of an interface on RTIL properties is profoundly different from that observed in other classes of liquids. The dynamics of planar thin films of the room temperature ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BmimNTf2), were investigated using two-dimensional infrared spectroscopy (2D IR) with the CN stretch of SeCN- as the vibrational probe. The stru...Continue Reading

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Citations

Apr 24, 2020·The Journal of Chemical Physics·Steven A YamadaMichael D Fayer
Jul 10, 2021·JACS Au·Rossella GrecoAntonio Leyva-Pérez
May 1, 2020·Journal of the American Chemical Society·Boning WuMichael D Fayer
Jan 8, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Yufeng WangGary J Blanchard
Jan 20, 2021·The Journal of Physical Chemistry. B·Yufeng WangG J Blanchard
Dec 7, 2021·The Journal of Physical Chemistry Letters·Nicholas H C Lewis, Andrei Tokmakoff
Dec 29, 2021·The Journal of Physical Chemistry. B·Bogdan DerekaAndrei Tokmakoff
Jan 29, 2022·Physical Chemistry Chemical Physics : PCCP·Md Iqbal Hossain, G J Blanchard

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