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Related Concept Videos

Membrane Fluidity01:26

Membrane Fluidity

Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
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The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
Characteristics of Fluids01:31

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Related Experiment Video

Updated: Jun 21, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Frequency-dependent fluidity and conductivity of an ionic liquid.

Ana Santić1, Wojciech Wrobel, Monika Mutke

  • 1Institute of Physical Chemistry and Sonderforschungsbereich 458, University of Münster, Corrensstrasse 30, D-48149 Münster, Germany.

Physical Chemistry Chemical Physics : PCCP
|July 10, 2009
PubMed
Summary

Shear fluidity and ionic conductivity in 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMIm]BF(4)) exhibit similar frequency and temperature dependencies. This suggests their underlying dynamics are governed by comparable time correlation functions.

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Published on: December 20, 2016

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Area of Science:

  • Physical Chemistry
  • Materials Science
  • Ionic Liquids

Background:

  • Ionic liquids (ILs) like 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMIm]BF(4)) are crucial in various applications.
  • Understanding the relationship between their mechanical and electrical properties is key to optimizing their use.

Purpose of the Study:

  • To investigate the frequency- and temperature-dependent shear fluidity (f(nu,T)) of [BMIm]BF(4).
  • To compare the shear fluidity with its ionic conductivity (sigma(nu,T)).
  • To explore the underlying dynamic processes governing these properties.

Main Methods:

  • Experimental measurement of shear fluidity over five decades of frequency at various temperatures.
  • Comparison of frequency-dependent shear fluidity with ionic conductivity data.
  • Modeling of experimental results using the MIGRATION concept.

Main Results:

  • DC fluidity and conductivity of [BMIm]BF(4) show non-Arrhenius behavior.
  • Both DC fluidity and conductivity superimpose on Arrhenius-type plots with a small shift in the inverse temperature axis.
  • Frequency-dependent shear fluidity spectra closely match those of ionic conductivity.

Conclusions:

  • Shear fluidity and ionic conductivity of [BMIm]BF(4) display remarkably similar frequency and temperature dependencies.
  • The MIGRATION concept effectively models these properties.
  • Both properties are likely Fourier transforms of similar time correlation functions, indicating shared dynamic origins.