A new technique for the measurement of ternary molecular diffusion coefficients in liquid systems

Abstract

A double Savart plate birefringent interferometer was used to study the diffusional behavior of the ternary system. Acetone (1) – Benzene (2) – Methanol (3). The ternary diffusion coefficients were measured at 9 composition points covering the entire ternary diagram. The binaries forming the borders of the ternary diagram were also studied. The ternary diffusion coefficients at one composition point of the ternary system Actone (1) – Benzene (2) – Carbon tetrachloride (3) were measured and compared with previously reported data of Cullinan and Toor(18), obtained by diaphragm cell method. Validity of the birefringent interferometric measurements when applied to the ternary liquid systems was confirmed through this comparison.

Form of multicomponent Fickian diffusion coefficients matrix

“…A total of 35 reported data points have D V with complex eigenvalues; of these, 34 data points are for ternary mixtures, while one data point is for a quaternary mixture. Tables 8-10 present reported mixture conditions and D V ij [19][20][21][22][23][24]31,[34][35][36]42,64,84], and calculated k D,i for ternary mixtures whose D V have complex eigenvalues. Similarly, reported mixture conditions and D V ij [132], and calculated k D,i for one quaternary mixture whose D V has complex eigenvalues are shown in table 11.…”

“…We calculate D M ij based on the generalized multicomponent diffusion coefficients framework as outlined in equations (19) to (23) of section 2.5. Infinite dilution diffusion coefficients are calculated from the correlation by Leahy-Dios and Firoozabadi [16], which is based on corresponding state theory.…”

Solvatochromism and preferential solvation of Brooker's merocyanine in water–methanol mixtures

“…Preferential solvation, a phenomenon whereby a solute is solvated more preferentially by one solvent than by others, usually occurs in a mixed solvent, and the local mole fractions of a solvent around the solute differ from the bulk mole fractions . Preferential solvation has attracted the attention of researchers because many chemical reactions and biological processes occur in a mixed solvent, and the environment around a solute has a large influence on the reaction and physical properties …”

“…[1] Preferential solvation has attracted the attention of researchers because many chemical reactions and biological processes occur in a mixed solvent, and the environment around a solute has a large influence on the reaction and physical properties. [2][3][4][5][6] The solvatochromic shift of absorption and emission spectra is strongly affected by preferential solvation because the solvation structure near the solute molecules drastically changes the electronic structure of the solute molecules. A binary or multicomponent mixed solvent is useful to control the solvatochromic shift by changing the mole fraction of the components.…”

The effect of alcohols as the third component on diffusion in mixtures of aromatics and ketones

“…Most of the binary experimental data were taken from the literature. [20][21][22][23][24][25][26][27] (benzene + acetone) should hold. The present experimental and simulation results for D 11 are consistent with these asymptotic limits.…”