Solubilities (S) of KBPh4 in water, methanol, ethanol, 1-propanol, 1-butanol,1-pentanol, 1-hexanol, 1-octanol at 288.15, 298.15, 308.15, 318.15, 328.15K have been determined by the spectrophotometry. These data can be...Solubilities (S) of KBPh4 in water, methanol, ethanol, 1-propanol, 1-butanol,1-pentanol, 1-hexanol, 1-octanol at 288.15, 298.15, 308.15, 318.15, 328.15K have been determined by the spectrophotometry. These data can be expressed by 1gS=-(1.4184-0.8725lgn)/(1-132.45T-1), where n are the atomic number of carbon for the straight chains monohydric alcohols; T is the temperatuxe. The standard transfer free energies (△tG) of KBPh4 from water to straight chains monohydric alcohols in the temperature ranges of 288.15-328.15K have been calculated. The results can be expressed as △tG=-18.029+5.766×10-5T2+(6.817×10-2-5.302×10-10T3)-1lgn.展开更多
The standard transfer Gibbs energy(Δ trG ) of potassium tetraphenylborate (KBPh4) from water to water and 2-propanol solvent mixtures and from methanol to methanol and 2-propanol solvent mixtures within the whole c...The standard transfer Gibbs energy(Δ trG ) of potassium tetraphenylborate (KBPh4) from water to water and 2-propanol solvent mixtures and from methanol to methanol and 2-propanol solvent mixtures within the whole concentration range of the mixed solvents are studied at 298.15 K.TheΔ trG value of KBPh4 reaches an extreme value from water to water and 2-propanol solvent mixtures,while it increases monotonically with an increasing of 2-propanol content in methanol and 2-propanol solvent mixtures.This indicates the different interaction of KBPh4 with the two kind of solvent mixtures.展开更多
The standard transfer Gibbs energies (Δ trG° )of KBPh4 from reference solvent of water to water/ethanol, water/propanol, water/2- propanol,water/ethylene glycol, water/glycerol mixtures in different proportional...The standard transfer Gibbs energies (Δ trG° )of KBPh4 from reference solvent of water to water/ethanol, water/propanol, water/2- propanol,water/ethylene glycol, water/glycerol mixtures in different proportional ratio have been studied. The interactions of KBPh4 with the above mixed solvents were analyzed. The standard transfer Gibbs energy of cavity(Δ trG° cav) and the standard transfer Gibbs energy of interaction(Δ trG° int) from water to water/2- propanol mixtures at 298.15 K were calculated by the Scaled Particle Theory (SPT).展开更多
Standard Gibbs energies of transfer,△Gθt,of Tl(Ⅰ)from water to aqueous sucrose and aqueous glucose solutions(mass fractions of sucrose and glucose W=0,010,020,030,040 and 050)were determined by po...Standard Gibbs energies of transfer,△Gθt,of Tl(Ⅰ)from water to aqueous sucrose and aqueous glucose solutions(mass fractions of sucrose and glucose W=0,010,020,030,040 and 050)were determined by polarography at 298±1K.In aqueous sucrose and glucose solutions containing 50×10-2mol·L-1LiClO4,the reversible halfwave potential and the diffusion coefficients for Tl(Ⅰ)were determined,respectively.Values of △Gθt,obtained from the reversible halfwave potentials vs.the ferrocene electrode scale,are negative and these decrease with increasing concentration of sucrose and glucose,indicating increasing stability of Tl(Ⅰ)in sucrosewater and glucosewater solutions.The △Gθt values were split into electrostatic and chemical contributions.The decreased chemical contribution shows that the mixtures are more basic than pure water.The experimental results were discussed in terms of solutesolvent and solutesolute interactions in the ternary systems.展开更多
文摘Solubilities (S) of KBPh4 in water, methanol, ethanol, 1-propanol, 1-butanol,1-pentanol, 1-hexanol, 1-octanol at 288.15, 298.15, 308.15, 318.15, 328.15K have been determined by the spectrophotometry. These data can be expressed by 1gS=-(1.4184-0.8725lgn)/(1-132.45T-1), where n are the atomic number of carbon for the straight chains monohydric alcohols; T is the temperatuxe. The standard transfer free energies (△tG) of KBPh4 from water to straight chains monohydric alcohols in the temperature ranges of 288.15-328.15K have been calculated. The results can be expressed as △tG=-18.029+5.766×10-5T2+(6.817×10-2-5.302×10-10T3)-1lgn.
文摘The standard transfer Gibbs energy(Δ trG ) of potassium tetraphenylborate (KBPh4) from water to water and 2-propanol solvent mixtures and from methanol to methanol and 2-propanol solvent mixtures within the whole concentration range of the mixed solvents are studied at 298.15 K.TheΔ trG value of KBPh4 reaches an extreme value from water to water and 2-propanol solvent mixtures,while it increases monotonically with an increasing of 2-propanol content in methanol and 2-propanol solvent mixtures.This indicates the different interaction of KBPh4 with the two kind of solvent mixtures.
文摘The standard transfer Gibbs energies (Δ trG° )of KBPh4 from reference solvent of water to water/ethanol, water/propanol, water/2- propanol,water/ethylene glycol, water/glycerol mixtures in different proportional ratio have been studied. The interactions of KBPh4 with the above mixed solvents were analyzed. The standard transfer Gibbs energy of cavity(Δ trG° cav) and the standard transfer Gibbs energy of interaction(Δ trG° int) from water to water/2- propanol mixtures at 298.15 K were calculated by the Scaled Particle Theory (SPT).
文摘Standard Gibbs energies of transfer,△Gθt,of Tl(Ⅰ)from water to aqueous sucrose and aqueous glucose solutions(mass fractions of sucrose and glucose W=0,010,020,030,040 and 050)were determined by polarography at 298±1K.In aqueous sucrose and glucose solutions containing 50×10-2mol·L-1LiClO4,the reversible halfwave potential and the diffusion coefficients for Tl(Ⅰ)were determined,respectively.Values of △Gθt,obtained from the reversible halfwave potentials vs.the ferrocene electrode scale,are negative and these decrease with increasing concentration of sucrose and glucose,indicating increasing stability of Tl(Ⅰ)in sucrosewater and glucosewater solutions.The △Gθt values were split into electrostatic and chemical contributions.The decreased chemical contribution shows that the mixtures are more basic than pure water.The experimental results were discussed in terms of solutesolvent and solutesolute interactions in the ternary systems.
