Solubility and dielectric properties of benzoic acid in a binary solvent: Water-ethylene glycol

Yurquina, Alicia; Manzur, María E.; Brito, P.; Manzo, Rubén H.; Molina, M.A.A.

doi:10.1016/s0167-7322(03)00178-8

Cited by 21 publications

(3 citation statements)

References 3 publications

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“…DCM was chosen as it has a similar dielectric constant as benzoic acid – providing an environment more representative of the experimental system than vacuum. [ 56 ] The magnitudes of the dipole moments are collected in Table S2 (Supporting Information), and the direction for each molecule can be seen in Figure S15 (Supporting Information) indicated by the arrow. Having a dipole at the interface of the TiO 2 should act to change the energetics at the interface and hence cause the device to behave similarly to the predicted behavior shown in Figure 3b,c.…”

Section: Resultsmentioning

confidence: 99%

Ionic Accumulation as a Diagnostic Tool in Perovskite Solar Cells: Characterizing Band Alignment with Rapid Voltage Pulses

et al. 2023

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Despite record‐breaking devices, interfaces in perovskite solar cells are still poorly understood, inhibiting further progress. Their mixed ionic‐electronic nature results in compositional variations at the interfaces, depending on the history of externally applied biases. This makes it difficult to measure the band energy alignment of charge extraction layers accurately. As a result, the field often resorts to a trial‐and‐error process to optimize these interfaces. Current approaches are typically carried out in a vacuum and on incomplete cells, hence values may not reflect those found in working devices. To address this, a pulsed measurement technique characterizing the electrostatic potential energy drop across the perovskite layer in a functioning device is developed. This method reconstructs the current‐voltage (JV) curve for a range of stabilization biases, holding the ion distribution “static” during subsequent rapid voltage pulses. Two different regimes are observed: at low biases, the reconstructed JV curve is “s‐shaped”, whereas, at high biases, typical diode‐shaped curves are returned. Using drift‐diffusion simulations, it is demonstrated that the intersection of the two regimes reflects the band offsets at the interfaces. This approach effectively allows measurements of interfacial energy level alignment in a complete device under illumination and without the need for expensive vacuum equipment.

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Section: Resultsmentioning

confidence: 99%

Ionic Accumulation as a Diagnostic Tool in Perovskite Solar Cells: Characterizing Band Alignment with Rapid Voltage Pulses

et al. 2023

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“…The required auxiliary data for the density and the dielectric constant of MEG/water mixed solvents (see eq ) are available in the literature (Supporting Information (SI)). − Akerlof reported values for dielectric constant of MEG/water mixed solvents from 293.15 to 333.15 K and at mole fractions up to 1 of the cosolvent. Values for dielectric constants of MEG/water mixed solvents up to 473 K were estimated from the Akerlof correlation , (see SI): For temperatures above 473 K, the dielectric constant for aqueous/organic mixed solvent can be estimated from the more comprehensive model recently presented by Maribo-Mogensen et al …”

Section: Calculations and Resultsmentioning

confidence: 99%

Thermodynamic Properties and Solubility of Sodium and Potassium Chloride in Ethane-1,2-diol/Water Mixed Solvent Systems to High Temperatures

2017

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Solid sodium chloride solubility is measured at temperatures from 297 to 467 K at pressure of 6.45 MPa in ethane-1,2-diol/water mixed solvent systems and at a concentration of cosolvent up to 75% w/w. The corresponding solubility is also predicted from an extension of the unified theory of electrolytes to mixed solvents (J. Phys. Chem. B201211690339042) for sodium and potassium chloride up to 473.15 K and over the whole composition range of the cosolvent. A comparison of the predicted solubility with the corresponding experimental values from this study and the available literature data indicates good agreement in all cases to well within the uncertainties of the experimental data. Also, for the saturated solution of sodium and potassium chloride in ethane-1,2-diol/water mixed solvent systems, the stoichiometric activity coefficient values are estimated up to 473.15 K. These stoichiometric activity coefficients, over the complete range of mole fraction of the cosolvent, are then extended to all concentrations (0 ≤ m ≤ m sat), and the results are compared with the available data in the literature.

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“…Literarure reveals that few studies on the dissociation constants of benzoic acid and derivative of benzoic acids in alkanol-water mixtures by conductometric methods have been performed earlier. [4][5][6][7][8] But no report about the investigation on the conductometric studies of benzoic acid in 1-propanol mixture are available yet.…”

Section: Introductionmentioning

confidence: 99%

Conductimetric Properties of Benzoic Acid in Water and 1-Propanol Mixtures at the Temperatures from 298.15 to 313.15K

Kabir¹,

Nath²,

Hossain³

et al. 2018

Orient. J. Chem

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Molar conductance of benzoic acid in 1-propanol-water mixtures has been measured in the composition of 0, 5, 10, 15, 20, 30 and 40 wt % of 1-propanol at 5 K interval from 298.15 to 313.15 K. The limiting molar conductance Λ o and the thermodynamic dissociation constant constant pKa were estimated from the measured conductance data using Bray-Kraus and Fuoss-Kraus equations. An approximate linear dependence of pK a with the reciprocal of the dielectric constant of the media was observed and this trend may be due to the dominating effect of the coulombic forces of attractions between the opposite ions over the other types of attractions. The gradual decreases of Λ o with the increase of 1-propanol fraction in the binary mixtures of 1-propanol and water may be attributed to relative increase in the viscosities of 1-propanol-water mixtures. The Walden product and normalized Walden product (nwp) of the benzoic acid in the seven binary mixtures have been calculated and a qualitative proposal has been made regarding their variation with wt% of 1-propanol. The free energies of transfer ΔG°t r, also have been computed for the acid in the solvent mixtures. The change of pK a with the solvent composition has been discussed in terms of the free energy of transfer from water to the 1-propanol-water mixtures.

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Solubility and dielectric properties of benzoic acid in a binary solvent: Water-ethylene glycol

Cited by 21 publications

References 3 publications

Ionic Accumulation as a Diagnostic Tool in Perovskite Solar Cells: Characterizing Band Alignment with Rapid Voltage Pulses

Ionic Accumulation as a Diagnostic Tool in Perovskite Solar Cells: Characterizing Band Alignment with Rapid Voltage Pulses

Thermodynamic Properties and Solubility of Sodium and Potassium Chloride in Ethane-1,2-diol/Water Mixed Solvent Systems to High Temperatures

Conductimetric Properties of Benzoic Acid in Water and 1-Propanol Mixtures at the Temperatures from 298.15 to 313.15K

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