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 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

Heart Rate Variability, Emotions, and Music

2010 ◽  
Vol 24 (2) ◽  
pp. 112-119 ◽  
Author(s):  
F. Riganello ◽  
A. Candelieri ◽  
M. Quintieri ◽  
G. Dolce
Keyword(s):  
Data Mining ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Vegetative State ◽  
Low Frequency ◽  
Emotional Reactions ◽  
Heart Beat ◽  
Healthy Controls ◽  
Frequency Spectra ◽  
Emotional Value

The purpose of the study was to identify significant changes in heart rate variability (an emerging descriptor of emotional conditions; HRV) concomitant to complex auditory stimuli with emotional value (music). In healthy controls, traumatic brain injured (TBI) patients, and subjects in the vegetative state (VS) the heart beat was continuously recorded while the subjects were passively listening to each of four music samples of different authorship. The heart rate (parametric and nonparametric) frequency spectra were computed and the spectra descriptors were processed by data-mining procedures. Data-mining sorted the nu_lf (normalized parameter unit of the spectrum low frequency range) as the significant descriptor by which the healthy controls, TBI patients, and VS subjects’ HRV responses to music could be clustered in classes matching those defined by the controls and TBI patients’ subjective reports. These findings promote the potential for HRV to reflect complex emotional stimuli and suggest that residual emotional reactions continue to occur in VS. HRV descriptors and data-mining appear applicable in brain function research in the absence of consciousness.

Temperature Dependence of the Air/Water Interface Revealed by Polarization Sensitive Sum-Frequency Generation Spectroscopy

2018 ◽  
Author(s):  
Daniel R. Moberg ◽  
Shelby C. Straight ◽  
Francesco Paesani
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Potential Energy Function ◽  
Md Simulations ◽  
Sum Frequency Generation ◽  
Water Molecules ◽  
Water Interface ◽  
Sum Frequency ◽  
Air Water Interface ◽  
Frequency Generation

<div> <div> <div> <p>The temperature dependence of the vibrational sum-frequency generation (vSFG) spectra of the the air/water interface is investigated using many-body molecular dynamics (MB-MD) simulations performed with the MB-pol potential energy function. The total vSFG spectra calculated for different polarization combinations are then analyzed in terms of molecular auto-correlation and cross-correlation contributions. To provide molecular-level insights into interfacial hydrogen-bonding topologies, which give rise to specific spectroscopic features, the vSFG spectra are further investigated by separating contributions associated with water molecules donating 0, 1, or 2 hydrogen bonds to neighboring water molecules. This analysis suggests that the low frequency shoulder of the free OH peak which appears at ∼3600 cm−1 is primarily due to intermolecular couplings between both singly and doubly hydrogen-bonded molecules. </p> </div> </div> </div>

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