Bound water: Evidence from and implications for the dielectric properties of aqueous solutions

Kaatze, U.

doi:10.1016/j.molliq.2011.06.012

Cited by 43 publications

(41 citation statements)

References 78 publications

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“…For example, bound water has significantly different electromagnetic properties from free water (Kaatze, 2011). It is possible that the degree of decomposition and botanical composition of peat influences the amount of water molecules that are in a relatively bounded state.…”

Section: Discussionmentioning

confidence: 99%

Ground-penetrating radar study of the Cena Bog, Latvia: linkage of reflections with peat moisture content

Karušs¹,

Bērziņš²

2015

Bull. Geol. Soc. Finland

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Section: Discussionmentioning

confidence: 99%

Ground-penetrating radar study of the Cena Bog, Latvia: linkage of reflections with peat moisture content

Karušs¹,

Bērziņš²

2015

Bull. Geol. Soc. Finland

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“…5,45 Extracting hydration layer dielectric properties thus requires suitable theoretical modeling: Accordingly, we have devised a modified MGT for dilute solutions of spherical particles that accounts for tensorial dielectric effects in the hydration layer surrounding the solute particles. In our model, and as indicated in Fig.…”

Section: Effective-medium Theory For Solutions Of Hydrated Particlesmentioning

confidence: 99%

Anisotropy in the dielectric spectrum of hydration water and its relation to water dynamics

Gekle

Netz

2012

The Journal of Chemical Physics

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Proteins, molecules, and macromolecular assemblies in water are surrounded by a nanometer-sized hydration layer with properties very different from bulk water. Here, we use classical molecular dynamics simulations to study the dielectric response of hydration water next to hydrophobic and hydrophilic planar surfaces. We find the interfacial dielectric absorption of water to be strongly anisotropic: compared to bulk water, which shows a broad dielectric absorption maximum around 15 GHz in the imaginary part of the dielectric function, the absorption for electric fields parallel to the surface is of similar strength and shows a slight redshift, while for perpendicular electric fields it is strongly attenuated and blueshifted. This anisotropy is generic for hydrophobic and hydrophilic surfaces. From our spatially resolved dielectric functions and a modified Maxwell-Garnett theory that accounts for anisotropic hydration layers around spherical particles, the dielectric absorption of solutions of organic molecules and micelles is derived to exhibit the experimentally known attenuation in combination with a redshift. These two features are traced back to the subtle interplay of interfacial depolarization effects and the dielectric anisotropy in the hydration layer. By a detailed analysis of the individual water molecule dynamics the perpendicular blueshift is shown not to be linked to accelerated water reorientation, but rather to dielectric boundary effects. Carefully conducted angularly resolved experiments at planar aqueous interfaces will be able to resolve this dielectric anisotropy and thus to confirm the subtle connection between spectral absorption features and the molecular water dynamics in hydration layers.

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“…The main feature of dielectric properties of any aqueous solutions is the decrement of dielectric permittivity compared to bulk water. [11][12][13][14] Another typical specificity is the symmetrical spectra broadening with relaxation time alteration. Here, water is considered as the dipole subsystem, and the solute molecules play the role of the matrix.…”

Section: Introductionmentioning

confidence: 99%

Dielectric spectra broadening as a signature for dipole-matrix interaction. III. Water in adenosine monophosphate/adenosine-5′-triphosphate solutions

Puzenko

Levy

Shendrik

et al. 2012

The Journal of Chemical Physics

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In this, the third part of our series on the dielectric spectrum symmetrical broadening of water, we consider the nucleotide aqueous solutions. Where in Parts I [E. Levy et al., J. Chem. Phys. 136, 114502 (2012)] and II [E. Levy et al., J. Chem. Phys. 136, 114503 (2012)], the dipole-dipole or ion-dipole interaction had a dominant feature, now the interplay between these two types of dipole-matrix interactions will be considered. We present the results of high frequency dielectric measurements of different concentrations of adenosine monophosphate/adenosine-5'-triphosphate aqueous solutions. We observed the Cole-Cole broadening of the main relaxation peak of the solvent in the solutions. Moreover, depending on the nucleotide concentration, we observed both types of dipole-matrix interaction. The 3D trajectory approach (described in detail in Part I) is applied in order to highlight the differences between the two types of interaction.

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Bound water: Evidence from and implications for the dielectric properties of aqueous solutions

Cited by 43 publications

References 78 publications

Ground-penetrating radar study of the Cena Bog, Latvia: linkage of reflections with peat moisture content

Ground-penetrating radar study of the Cena Bog, Latvia: linkage of reflections with peat moisture content

Anisotropy in the dielectric spectrum of hydration water and its relation to water dynamics

Dielectric spectra broadening as a signature for dipole-matrix interaction. III. Water in adenosine monophosphate/adenosine-5′-triphosphate solutions

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