Electrokinetic Behavior of Fluoride Salts as Explained from Water Structure Considerations

Hu, Yuehua; Lu, Yujun; Veeramasuneni, S.; Miller, Jan D.

doi:10.1006/jcis.1997.4899

Cited by 29 publications

(36 citation statements)

References 6 publications

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“…According to the hydration characteristics of background electrolytes used in our experiments, the dynamics of solvent structure (E 0-salt ) in respective solutions will increase in the order: LiCl < NaCl < KCl and NaF < NaCl. This is in agreement with results of molecular dynamics simulations (Dlugoborski et al, 2000) or FTIS/IR (Fourier Transform Infrared Spectroscopy/internal reflection) spectroscopy studies (Hu et al, 1997).…”

Section: Hydration Of Ions In Electrolyte Solutionsupporting

confidence: 89%

The effect of specific background electrolytes on water structure and solute hydration: Consequences for crystal dissolution and growth

Kowacz

Putnis

2008

Geochimica et Cosmochimica Acta

104

154

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Section: Hydration Of Ions In Electrolyte Solutionsupporting

confidence: 89%

The effect of specific background electrolytes on water structure and solute hydration: Consequences for crystal dissolution and growth

Kowacz

Putnis

2008

Geochimica et Cosmochimica Acta

104

154

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“…Moreover, the hydration energy of fluoride (F − ) is much smaller that the metal ions, thus preferential leakage of F − would occur at the fluoride/water interface and more F − ions would be dissolved that the metal ions at solubility equilibrium. [ 6 ] As a consequence, the surface of the fluorides are tend be positively charged in water. [ 7 ] The orientation of water molecules adsorbed at a surface is rather different from that of bulk water due to the interface‐water interaction, reorientation of water molecules could swiftly occur as the change of surface charge.…”

Section: Resultsmentioning

confidence: 99%

Flow Alters the Interfacial Reactions of Upconversion Nanocrystals Probed by In Situ Sum Frequency Generation

Yao

Xiao

et al. 2020

Adv Materials Inter

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The interfacial interaction of the colloidal NPs in solution is closely related to the surface charge, which heavily influences the NP synthesis, colloidal stabilization and various applications. [2] In general, the inorganic core of colloidal NPs in solutions possess a net electric charge at the interface, which can attract dissolved heterogeneously-charged crystal-constituting ions and solvent molecules by electrostatic interaction, thus constructing the electrical double layer and rendering the NPs well-dispersed (Figure 1a). The presence of surface charge can also physically or chemically adsorb the dissolved molecules such as organic dyes at the NP interface, which restructures the energy dissipation pathways between the colloidal NPs and outside world. However, although much efforts had been devoted to understanding the interfacial interactions of NPs, comparable study taking into account the motion states of the particles is still rare. For example, the colloidal NPs could experience Brownian motion in stationary solution, flowing in fluid, as well as keeping static when being adhered on macroscopic objects, depending on the specific environments in applications such as biodetection, bioimaging, and printable electronics. [3] Albeit of its fundamental importance, the specific role of particle moving on the interfacial reactions of colloidal NPs is ambiguous up to now and as always been ignored for most cases.The sum frequency generation (SFG) vibrational spectroscopy, a second-order nonlinear optical technique, has been proved to be powerful for probing the interfacial molecules in view of its inherent interface selectivity and high sensitivity. [4] In this work, combined in situ spectroscopies based on SFG and photoluminescence (PL) characterization were adopted to reveal the unprecedented effect of particle moving to the interfacial adsorption of colloidal fluoride nanocrystals in great detail. Comparative results of the proof-of-concept experiments for the ligand-free NaYF 4 :Yb,Er upconverting (UC) nanocrystals reveal that the particle moving in aqueous solution reversibly alter the surface charge. More importantly, it is found that the motion state of the NPs determines molecular arrangement of Rhodamine B (RhB) at the particle interface, which significantly affect the energy transfer from the colloidal NPs to the adsorbed dyes.

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“…The red-side ͑stronger H-bonded͒ and blue-side ͑weaker H-bonded͒ subensembles do not simply show quantitative difference in their dynamics time scales. 31,74 SFG signal at charged aqueous interfaces may therefore originate not only from the monolayer of water molecules bound to the surface but also from the Helmholtz layer due to the so-called ͑3͒ effect. The recursion observed in the STiR-SFG signal excited on the red side of the transition points to the existence of an underdamped oscillatory mode in the H-bond network, something that is not obvious from the featureless frequency-domain line shape.…”

Section: B Simulation Of the Stir-sfg Signalsmentioning

confidence: 99%

Spectrally- and time-resolved vibrational surface spectroscopy: Ultrafast hydrogen-bonding dynamics at D2O/CaF2 interface

Bordenyuk

Benderskii

2005

The Journal of Chemical Physics

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Time- and frequency-domain three-wave mixing spectroscopy (IR+visible sum frequency generation) is developed as the lowest-order nonlinear technique that is both surface selective and capable of measuring spectral evolution of vibrational coherences. Using 70 fs infrared and 40 fs visible pulses, we observe ultrafast spectral dynamics of the OD stretch of D2O at the CaF2 surface. Spectral shifts indicative of the hydrogen-bond network rearrangement occur on the 100 fs time scale, within the observation time window determined by the vibrational dephasing. By tuning the IR pulse wavelength to the blue or red side of the OD-stretch transition, we selectively monitor the dynamics of different subensembles in the distribution of the H-bond structures. The blue-side excitation (weaker H-bonding structures) shows monotonic decay and nu(OD) frequency shift to the red on a 100 fs time scale, which is better described by a Gaussian than an exponential frequency correlation function. In contrast, the red-side excitation (stronger H-bonding structures) results in a blue spectral shift and a recursion in the signal at 125+/-10 fs, indicating the presence of an underdamped intermolecular mode of interfacial water.

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Electrokinetic Behavior of Fluoride Salts as Explained from Water Structure Considerations

Cited by 29 publications

References 6 publications

The effect of specific background electrolytes on water structure and solute hydration: Consequences for crystal dissolution and growth

The effect of specific background electrolytes on water structure and solute hydration: Consequences for crystal dissolution and growth

Flow Alters the Interfacial Reactions of Upconversion Nanocrystals Probed by In Situ Sum Frequency Generation

Spectrally- and time-resolved vibrational surface spectroscopy: Ultrafast hydrogen-bonding dynamics at D2O/CaF2 interface

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