Volumetric and viscosity properties for tetraalkylammonium bromides and some ions in PC + THF mixtures at 298.15 K

Zhao, Yang; Liu, Haijiao; Min, Zhaojun; Wang, Jianji

doi:10.1016/j.molliq.2016.09.035

Cited by 3 publications

(4 citation statements)

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“…The ultrasonic velocities of TAA + salt–dimethyl sulfoxide (DMSO)–acetone solutions have been measured to clarify the solvation structure of ions from the compressibility coefficients . The interactions between ions and solvent molecules were discussed from the volumetric and viscosity properties of TAABr–propylene carbonate (PC)–THF solutions . For acetonitrile (AN)–water binary solvents, the self-diffusion coefficients and conductance of tetraethylammonium iodide (TEAI) have been measured to elucidate the microphase separation of the binary solutions .…”

Section: Introductionmentioning

confidence: 99%

“…19 The interactions between ions and solvent molecules were discussed from the volumetric and viscosity properties of TAABr−propylene carbonate (PC)−THF solutions. 20 For acetonitrile (AN)− water binary solvents, the self-diffusion coefficients and conductance of tetraethylammonium iodide (TEAI) have been measured to elucidate the microphase separation of the binary solutions. 21 Uniquely, electrospray mass spectrometry has provided the information about the preferential solvation of TMA + and tetrabutylammonium (TBA + ) by acetonitrile (AN) molecules in AN−water binary solvents from the mass numbers of TBA + −solvent clusters.…”

Section: Introductionmentioning

confidence: 99%

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Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Takamuku

Yamamoto

et al. 2020

J. Phys. Chem. B

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The solvation structures of tetraethylammonium bromide and tetrafluoroborate (TEABr and TEABF 4 ) in aqueous binary solvents with ethanol (EtOH), 2,2,2trifluoroethanol (TFE), and acetonitrile (AN) have been clarified by molecular dynamics (MD) simulations. In addition, 1 H and 13 C NMR chemical shifts of the H and C atoms within TEA + in the binary solvents have been measured as a function of the mole fraction of the organic solvent, x OS . The variations of the chemical shifts with an increase in x OS were interpreted according to the solvation structures of TEA + , Br − , and BF 4 − obtained from the MD simulations. It has been found that TEABF 4 at 130 mmol dm −3 cannot be dissolved into the EtOH and TFE solvents above x OS ≈ 0.7 and 0.6, respectively, while TEABr can be done in both solvents. Interestingly, TEABr and TEABF 4 at the concentration can be dissolved in the AN solvents over the entire x OS range. The solvation of TEA + , Br − , and BF 4 − in each solvent has been discussed in terms of the electrostatic force, the weak hydrogen bond of C−H•••F− C, and the dipole−dipole interaction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Takamuku

Yamamoto

et al. 2020

J. Phys. Chem. B

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“…The peak concentration of ∼2.9 M THA + at 10 Å is slightly higher than the 2.3 M concentration of THA + /Br − calculated from the molar volume of ∼0.43 L/mol for the crystal or when dissolved in organic solvents. 55,56 In order to quantitatively match THA + adsorption in Figure 4 to glycerol depletion in Figure 3, the volume of the THA + ion must be ∼4 times larger than that of a glycerol molecule (as listed in Table 1). This 4:1 ratio is smaller than the 6:1 ratio that is expected on the basis of the 0.43 L/mol volume for THABr and 0.073 L/mol for glycerol.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Competing Segregation of Br^– and Cl^– to a Surface Coated with a Cationic Surfactant: Direct Measurements of Ion and Solvent Depth Profiles

2020

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Ion-surface scattering experiments can be used to measure elemental depth profiles on the angstrom scale in complex liquid mixtures. We employ NICISS (neutral impact collision ion scattering spectroscopy) to measure depth profiles of dissolved ions and solvent in liquid glycerol containing the cationic surfactant tetrahexylammonium bromide (THA + /Br − ) at 0.013 M and mixtures of NaBr + NaCl at 0.4 M total concentration. The experiments reveal that Br − outcompetes Cl − in its attraction to surface THA + , and that THA + segregates more extensively when more Br − ions are present. Intriguingly, the depths spanned by THA + , Br − , and Cl − ions generally increase with Br − bulk concentration, expanding from ∼10 to ∼25 Å for both Br − and Cl − depth profiles. This broadening likely occurs because of an increasing pileup of THA + ions in a multilayer region that spreads the halide ions over a wider depth. The experiments indicate that cationic surfactants enhance Br − and Cl − concentrations in the surface region far beyond their bulk-phase values, making solutions coated with these surfactants potentially more reactive toward gases that can oxidize the halide ions.

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“…Viscosity is one of the most important factors, which affect mobility of ions/molecules. It has been reported [70,71] that viscosity measurements are very useful in providing information regarding ion-solvent interaction, particularly as regards the modification induced by the solute on the solvent structure.…”

Section: S Cmentioning

confidence: 99%

Volumetric behaviour of tetra-n-butyl ammonium bromide in various solvents at different temperatures

Baluja

Alnayab

2019

Rev. Colomb. Cienc. Quím. Farm.

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Measurement of ultrasonic velocity, density and viscosity of solutions of Tetra Butyl Ammonium Bromide have been carried outin different solvents (water, methanol, ethanol, 1-propanol and 1-butanol) as functions of concentration (1 to 0.1 M) at different temperatures (298.15 K to 318.15 K). Using these experimental data, various acoustical and apparent parameters such as acoustical impedance, intermolecular free length, adiabatic compressibility, molar compressibility, Van der Waals constant, relaxation strength, apparent molar isentropic compressibility, apparent molar volume have been evaluated. Further, some thermodynamic parameters such as Gibbs free energy of activation, enthalpy and entropy of activation have been evaluated. All these parameters have been evaluated to understand type of interactions present in studied solutions.

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Volumetric and viscosity properties for tetraalkylammonium bromides and some ions in PC + THF mixtures at 298.15 K

Cited by 3 publications

References 23 publications

Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Competing Segregation of Br^– and Cl^– to a Surface Coated with a Cationic Surfactant: Direct Measurements of Ion and Solvent Depth Profiles

Volumetric behaviour of tetra-n-butyl ammonium bromide in various solvents at different temperatures

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Volumetric and viscosity properties for tetraalkylammonium bromides and some ions in PC + THF mixtures at 298.15 K

Cited by 3 publications

References 23 publications

Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Solvation Structures of Tetraethylammonium Bromide and Tetrafluoroborate in Aqueous Binary Solvents with Ethanol, Trifluoroethanol, and Acetonitrile

Competing Segregation of Br– and Cl– to a Surface Coated with a Cationic Surfactant: Direct Measurements of Ion and Solvent Depth Profiles

Volumetric behaviour of tetra-n-butyl ammonium bromide in various solvents at different temperatures

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Competing Segregation of Br^– and Cl^– to a Surface Coated with a Cationic Surfactant: Direct Measurements of Ion and Solvent Depth Profiles