Structural Relaxation and Viscoelasticity of a Higher Alcohol with Mesoscopic Structure

Yamaguchi, Tsuyoshi; Saito, Makina; Yoshida, Kōji; Yamaguchi, Toshio; Yoda, Yoshitaka; Seto, Makoto

doi:10.1021/acs.jpclett.7b02907

Cited by 30 publications

(30 citation statements)

References 28 publications

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“…[28] It should also be noted that similar slow, sub-structural relaxations are also observed in some other mesoscopically ordered liquids, most notably monohydroxy alcohols, where they are also attributed to a supramolecular origin. [44][45][46][47][48][49] Despite the apparent similarities in the dielectric and dynamic-mechanical spectra, these techniques are sensitive to distinctly different correlations within the bulk liquid, i.e. polarization and the stress tensor, respectively.…”

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confidence: 99%

Mesoscale Organization and Dynamics in Binary Ionic Liquid Mixtures

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Kapoor

Shah

et al. 2019

J. Phys. Chem. Lett.

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The impact of mesoscale organization on dynamics and ion transport in binary ionic liquid mixtures is investigated by broadband dielectric spectroscopy, dynamic-mechanical spectroscopy,x-ray scattering, and molecular dynamics simulations. The mixtures are found to form distinct liquids with macroscopic properties that significantly deviate from weighted contributions of the neat components. For instance, it is shown that the mesoscale morphologies in ionic liquids can be tuned by mixing to enhance the static dielectric permittivity of the resulting liquid by as high as 100% relative to the neat ionic liquid components. This enhancement is attributed to the intricate role of interfacial dynamics associated with the changes in the mesoscopic aggregate morphologies in these systems. These results demonstrate the potential to design the physicochemical properties of ionic liquids through control of solvophobic aggregation.Elucidating the influence of mesoscale organization on the dynamics and transport properties of ionic liquids is critical to developing design criteria for their applications in chemical synthesis, nanoparticle growth, biomass processing, batteries, solar cells, and supercapacitors.[1-10] In the past decade, the formation of mesoscale polar and non-polar domains in ionic liquids with substantial non-polar, alkyl side groups was recognized in detailed x-ray scattering, neutron scattering, and molecular dynamics (MD) simulation studies. [11][12][13][14][15][16] Mesoscale organization has been used to qualitatively explain numerous experimental findings which imply spatially and temporally distinct regions within bulk ionic liquids. [11,[17][18][19][20][21][22][23][24][25][26] Recent studies suggest that the existence and dynamics of the aggregates in neat ionic liquids, associated with fluctuations of the polar and non-polar regions, correlate strongly with many of the physicochemical properties of ionic liquids including transport properties such as zero-shear viscosity, dc ionic conductivity, and static dielectric permittivity. [27][28][29][30][31][32] However, no efforts to exploit the mesoscale organization to design novel ionic liquids with unique physical and chemical properties have been reported. In this work, it is demonstrated that by mixing ionic liquids with varying degrees of solvophobic aggregation, it is feasible to design distinct liquids with macroscopic properties that significantly deviate from weighted contributions of the neat components.The local organization, or morphology, of the mesoscale aggregates is in part determined by the relative volume fractions of the polar and non-polar groups of the component ions.[11] In amphiphilic imidazolium, pyrrolidinium, piperidinium, quaternary phos-

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confidence: 99%

Mesoscale Organization and Dynamics in Binary Ionic Liquid Mixtures

Cosby

Kapoor

Shah

et al. 2019

J. Phys. Chem. Lett.

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“…To date, SR-based QEGS spectroscopy has been used to study glass-forming molecular liquids [15][16][17][18][19], polymers [20], polymer nanocomposites [21], ionic liquids [22], alloys [23] and liquid crystals [24].…”

Section: Application Results Of Sr-based Qegs Using Tdimentioning

confidence: 99%

Synchrotron Radiation-Based Quasi-Elastic Scattering Using Mössbauer Gamma Ray with neV-Energy Resolution

Saito¹,

Kanaya²,

Mashita³

2020

Inelastic X-Ray Scattering and X-Ray Powder Diffraction Applications

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Gamma rays of energy 14.4 keV from excited 57 Fe nuclei show a very narrow energy width of 4.67 neV by the Mössbauer effect. Mössbauer gamma rays are utilised as probe beams in unique quasi-elastic scattering spectroscopy with neVenergy resolution. The technique enables measurements of atomic/molecular dynamics on timescales between nanoseconds and microseconds for various condensed matter systems, such as supercooled liquids, glasses and soft materials. The microscopic dynamics is measured in time domain or energy domain based on synchrotron radiation using a time-domain interferometer or a nuclear Bragg monochromator, respectively. We introduce state-of-the-art spectroscopic techniques, application results and future perspectives of quasi-elastic Mössbauer gamma ray scattering based on synchrotron radiation.

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“…Time-domain interferometry (TDI) is an experimental technique to probe space-time correlations among particles in condensed matter systems [1][2][3][4][5][6][7][8][9][10][11][12][13]. Such correlations are quantified by a generalization of the static pair distribution function [14], called the dynamical couple correlation function (DCF), which is given by…”

Section: Introductionmentioning

confidence: 99%

Backaction-free measurement of quantum correlations via quantum time-domain interferometry

Castrignano

Evers

2020

Phys. Rev. A

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Time-domain interferometry (TDI) is a method to probe space-time correlations among particles in condensed matter systems. Applying TDI to quantum systems raises the general question of whether two-time correlations can be reliably measured without an adverse impact of the measurement backaction on the dynamics of the system. Here, we show that a recently developed quantum version of TDI (QTDI) indeed can access the full quantum-mechanical two-time correlations without backaction. We further generalize QTDI to weak classical continuous-mode coherent input states, alleviating the need for single-photon input fields. Finally, we interpret our results by splitting the space-time correlations into two parts. While the first one is associated with projective measurements and thus insensitive to backaction, we identify the second contribution as arising from the coherence properties of the state of the probed target system, such that it is perturbed or even destroyed by measurements on the system.

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Structural Relaxation and Viscoelasticity of a Higher Alcohol with Mesoscopic Structure

Cited by 30 publications

References 28 publications

Mesoscale Organization and Dynamics in Binary Ionic Liquid Mixtures

Mesoscale Organization and Dynamics in Binary Ionic Liquid Mixtures

Synchrotron Radiation-Based Quasi-Elastic Scattering Using Mössbauer Gamma Ray with neV-Energy Resolution

Backaction-free measurement of quantum correlations via quantum time-domain interferometry

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