Journal ArticleDOI
Dielectric relaxation of electrolyte solutions in acetonitrile
TLDR
In this article, complex permittivity spectra in the frequency range 0.95-v (GHz)≤89 for acetonitrile and its solutions of LiBr, NaI, NaClO4, and Bu4NBr at 25°C show one Debye equation for the neat solvent whereas the superposition of a Debye process for the solute and a Cole-Cole distribution for the solvent is necessary to account for the dielectric relaxation behavior of the solutions.Abstract:
Complex permittivity spectra in the frequency range 0.95≤v (GHz)≤89 for acetonitrile and its solutions of LiBr, NaI, NaClO4, and Bu4NBr at 25°C show one Debye equation for the neat solvent whereas the superposition of a Debye process for the solute and a Cole-Cole distribution for the solvent is necessary to account for the dielectric relaxation behavior of the solutions. The reorientation of bulk acetonitrile is diffusive and only weakly coupled to viscosity. The number of solvent molecules irrotationally bound to the electrolyte is in good agreement with conventional solvation numbers for all electrolytes, when kinetic depolarization is assumed to be negligible. The solute relaxation process is dominated by the formation kinetics and reorientation of contact ion pairs. There is evidence for solvent-shared ion pairs in dilute NaClO4 solutions.read more
Citations
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Journal ArticleDOI
Dielectric relaxation of aqueous NaCl solutions
TL;DR: In this article, the complex dielectric permittivity of aqueous sodium chloride solutions has been determined in the frequency range 0.2 ≤ v(GHz) ≤ 20 with a commercial dielectrics measurement system based on a vector network analyzer.
Journal ArticleDOI
Ultrafast Elementary Photochemical Processes of Organic Molecules in Liquid Solution
TL;DR: Reactions discussed include intra- and intermolecular electron- and proton-transfer processes, as well as photochromic reactions occurring with and without bond breaking or bond formation, namely ring-opening reactions and cis-trans isomerizations, respectively.
Journal ArticleDOI
Interactions and dynamics in electrolyte solutions by dielectric spectroscopy
Richard Buchner,Glenn Hefter +1 more
TL;DR: It is shown that many of the difficulties associated with this technique have been overcome in recent years by technological developments.
Journal ArticleDOI
Solvent dynamics derived from optical kerr effect, dielectric dispersion, and time-resolved stokes shift measurements : an empirical comparison
TL;DR: In this article, data from the optical Kerr effect, time-resolved Stokes shift, and dielectric dispersion experiments on 21 common room temperature solvents are collected and compared.
Journal ArticleDOI
Ion-pair and solvent relaxation processes in aqueous na2so4 solutions
TL;DR: In this article, the complex dielectric permittivity of aqueous sodium sulfate solutions (0.025 ≤ c/mol dm-3 ≤ 1.6) has been determined in the frequency range 0.2 ≤ ν/GHz ≤ 20 with a commercial measurement system based on a vector network analyzer.
References
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Book ChapterDOI
A Consistent Molecular Treatment of Dielectric Phenomena
Paul A. Madden,Daniel Kivelson +1 more
TL;DR: In this article, the constant dielectrique and permittivite des molecules a l'etat liquide are discussed, as well as the permittivity of the molecules.
Journal ArticleDOI
High frequency permittivity and its use in the investigation of solution properties
Josef Barthel,Richard Buchner +1 more
TL;DR: In this paper, permittivity measurements at microwave to far-infrared frequencies are reported for various liquid electrolyte and non-electrolyte systems, which enlarge our knowledge on processes which produce (by their complex interplay of orientational, intramolecular, kinetic, H-bonding, diffusional and migrational modes) the properties of pure solvents, solvent mixtures and solutions.
Journal ArticleDOI
Dielectric spectra of some common solvents in the microwave region. Dipolar aprotic solvents and amides
TL;DR: In this paper, the complex permittivity spectra of amides formamide, N-methylformamide and N-dimethylformamide, as well as dipolar aprotic solvents acetonitrile, propylene carbonate and dimethylsulfoxide were determined in the frequency range 0.95-89 GHz.
Journal ArticleDOI
Molecular theory of solvated ion dynamics. III. The kinetic dielectric decrement
TL;DR: In this article, a microscopic theory of the kinetic dielectric decrement in ionic solutions is developed, which clarifies the physical origin of the effect, showing that it is analogous to the electrophoretic effect, and corrects a violation of the reciprocity relations in the original continuum treatment of Hubbard and Onsager.
Book ChapterDOI
Non-aqueous electrolyte solutions in chemistry and modern technology
TL;DR: In this article, a brief survey is given of the properties of non-aqueous electrolyte solutions and their applications in chemistry and technology without going into the details of theory, and specific solvent-solute interactions and the role of the solvent beyond its function as a homogenous isotropic medium are stressed.