Comparison of Low-Frequency Spectra between Aromatic and Nonaromatic Cation Based Ionic Liquids Using Femtosecond Raman-Induced Kerr Effect Spectroscopy

ChemPhysChem ◽  
2012 ◽  
Vol 13 (7) ◽  
pp. 1638-1648 ◽  
Author(s):  
Hideaki Shirota
Keyword(s):  
Ionic Liquids ◽  
Kerr Effect ◽  
Low Frequency ◽  
Frequency Spectra

scholarly journals Low-frequency (gigahertz to terahertz) depolarized Raman scattering off n-alkanes, cycloalkanes, and six-membered rings: a physical interpretation

2020 ◽  
Author(s):  
Andrew J. Farrell ◽  
Mario González Jiménez ◽  
Gopakumar Ramakrishnan ◽  
Klaas Wynne
Keyword(s):  
Kerr Effect ◽  
Ad Hoc ◽  
Low Frequency ◽  
Stress Tests ◽  
Frequency Spectra ◽  
Spectral Lineshape ◽  
Ultrafast Optical ◽  
Robust Model ◽  
Complex Liquids ◽  
Liquid Methane

Molecular liquids have long been known to undergo various distinct and simple intermolecular motions, from fast librations and cage rattling oscillations to slow orientational and translational diffusion. However, their resultant gigahertz to terahertz spectra are far from simple, appearing as broad shapeless bands that span many orders of magnitude of frequency making meaningful interpretation troublesome. <i>Ad hoc</i> spectral lineshape fitting has become a notoriously fine art in the field; a unified approach to handling such spectra is long overdue. Here we apply ultrafast optical Kerr-effect (OKE) spectroscopy to study the intermolecular dynamics of room temperature <i>n</i>-alkanes, cycloalkanes, and six-carbon rings, as well as liquid methane and propane. This work provides stress-tests and converges upon an experimentally robust model across simple molecular series and temperatures, providing a blueprint for the interpretation of the dynamics of van der Waals liquids. This will enable the interpretation of low frequency spectra of more complex liquids.

scholarly journals Nanostructure domains, voids, and low-frequency spectra in binary mixtures of N,N-dimethylacetamide and ionic liquids with varying cationic size

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1811-1827 ◽  
Author(s):  
Th. Dhileep N. Reddy ◽  
Bhabani S. Mallik
Keyword(s):  
Ionic Liquids ◽  
Binary Mixtures ◽  
Low Frequency ◽  
Md Simulations ◽  
Frequency Spectra

Classical MD simulations were carried out on binary mixtures of DMA with hydroxide based ammonium ILs, TEAH, TPAH and TBAH, at three different mole fractions of IL.

Low-Frequency Spectra of Metallocenium Ionic Liquids Studied by Terahertz Time-Domain Spectroscopy

2011 ◽  
Vol 115 (8) ◽  
pp. 1313-1319 ◽  
Author(s):  
Anjan Chakraborty ◽  
Takashi Inagaki ◽  
Motohiro Banno ◽  
Tomoyuki Mochida ◽  
Keisuke Tominaga
Keyword(s):  
Ionic Liquids ◽  
Time Domain ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Frequency Spectra ◽  
Time Domain Spectroscopy

scholarly journals Low-frequency (gigahertz to terahertz) depolarized Raman scattering off n-alkanes, cycloalkanes, and six-membered rings: a physical interpretation

2020 ◽  
Author(s):  
Andrew J. Farrell ◽  
Mario González Jiménez ◽  
Gopakumar Ramakrishnan ◽  
Klaas Wynne
Keyword(s):  
Kerr Effect ◽  
Ad Hoc ◽  
Low Frequency ◽  
Stress Tests ◽  
Frequency Spectra ◽  
Spectral Lineshape ◽  
Ultrafast Optical ◽  
Robust Model ◽  
Complex Liquids ◽  
Liquid Methane

Molecular liquids have long been known to undergo various distinct and simple intermolecular motions, from fast librations and cage rattling oscillations to slow orientational and translational diffusion. However, their resultant gigahertz to terahertz spectra are far from simple, appearing as broad shapeless bands that span many orders of magnitude of frequency making meaningful interpretation troublesome. <i>Ad hoc</i> spectral lineshape fitting has become a notoriously fine art in the field; a unified approach to handling such spectra is long overdue. Here we apply ultrafast optical Kerr-effect (OKE) spectroscopy to study the intermolecular dynamics of room temperature <i>n</i>-alkanes, cycloalkanes, and six-carbon rings, as well as liquid methane and propane. This work provides stress-tests and converges upon an experimentally robust model across simple molecular series and temperatures, providing a blueprint for the interpretation of the dynamics of van der Waals liquids. This will enable the interpretation of low frequency spectra of more complex liquids.

scholarly journals Effects of Aromaticity in Cations and Their Functional Groups on the Low-Frequency Spectra and Physical Properties of Ionic Liquids

2014 ◽  
Vol 119 (29) ◽  
pp. 9173-9187 ◽  
Author(s):  
Hideaki Shirota ◽  
Hironori Matsuzaki ◽  
Sharon Ramati ◽  
James F. Wishart
Keyword(s):  
Ionic Liquids ◽  
Physical Properties ◽  
Functional Groups ◽  
Low Frequency ◽  
Frequency Spectra
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