Influence of Water on Carbon Dioxide and Room Temperature Ionic Liquid Dynamics: Supported Ionic Liquid Membrane vs the Bulk Liquid

Shin, Jae Yoon; Yamada, Steven A.; Fayer, Michael D.

doi:10.1021/acs.jpcb.8b01163

Title: Influence of Water on Carbon Dioxide and Room Temperature Ionic Liquid Dynamics: Supported Ionic Liquid Membrane vs the Bulk Liquid

Journal Article · Wed Feb 07 00:00:00 EST 2018 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry

DOI:https://doi.org/10.1021/acs.jpcb.8b01163· OSTI ID:1788264

Shin, Jae Yoon ^[1]; Yamada, Steven A. ^[1];

^[1]

Stanford Univ., CA (United States)

The influence of water on the dynamics of a room temperature ionic liquid (RTIL), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EmimNTf2), and CO2 in the RTIL were studied in the bulk liquid and a supported ionic liquid membrane (SILM) using two-dimensional infrared (2D IR) and IR polarization selective pump-probe (PSPP) spectroscopies. In the water-saturated bulk EmimNTf2, the complete orientational randomization and structural spectral diffusion (SSD) of CO2 became faster than in the dry EmimNTf2. In the poly (ether sulfone) SILM, only the longer time components of the SSD became faster in the water-saturated RTIL; the complete orientational randomization remained similar to the dry RTIL in the SILM. The implication is that the presence of water in EmimNTf2 contained in the SILM facilitates the fluctuation of globally modified RTIL structure in the pores but the local RTIL environments are relatively unaffected.

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Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: FG02-84ER13251; FG03-84ER13251; FA9550-16-1-0104

OSTI ID:: 1788264

Alternate ID(s):: OSTI ID: 1804115

Journal Information:: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry, Vol. 122, Issue 8; ISSN 1520-6106

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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