Partition coefficients of low-volatility solutes in the ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate-supercritical CO2 system from chromatographic retention measurements

Article Abstract:

Room temperature ionic liquid (RTIL) 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmin][PF6]) is employed as the stationary liquid in capillary column chromatography with supercritical carbon dioxide (scCO2) as the mobile phase. The findings indicate that SFC in open tubular columns provides a self-contained method to measure relative values of solute partition coefficients in biphasic RTIL-scCO2 systems.

Observations, Chromatography, Atomic properties

---

The conventional method of the determination of enthalpy change at ion solvation in solutions: Is it correct?

Article Abstract:

The conventional method of the determination of enthalpy change at ion solvation in solutions by using the Born-Haber cycle gives incorrect values for this fundamental parameter. A new experimental method, namely, mass spectrographic method using field evaporation of ions from solutions (FEIS) that is free from the defects of the conventional one is presented.

Solution (Chemistry), Solutions (Chemistry)

---

Staging is more important than perturbation method for computation of enthalpy and entropy changes in complex systems

Article Abstract:

A study is conducted to examine ways to improve the computational ability in order to determine changes in both enthalpy and entropy. The findings indicate only subtle differences among the better perturbation methods and much larger improvements in relative accuracy with the use and careful selection of staged intermediates along the reaction coordinate.

Entropy (Physics), Entropy (Thermodynamics)

Similar abstracts:

• Abstracts: Solution structures of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid saturated with CO2: Experimental evidence of specific anion-CO2 interaction
• Abstracts: Characterization of low-energy chlorophylls in the PSI-LHCI supercomplex from Chlamydomonas reinhardtii. A site-selective fluorescence study
• Abstracts: Group definition in molecular solution theories by quantum mechanical methods: application to 1-alkanol + n-alkane mixtures
• Abstracts: Structural effects of a basic peptide on the organization of dipalmitoylphosphatidylcholine/dipalmitoylphosphatidylserine membranes: A fluorescent resonance energy transfer study
• Abstracts: Oxygen chemical diffusion coefficient in manganite thin films by isothermal electric resistivity measurements

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.