Controlled polarity of CO2 switchable solution with DBU and alcohols
In: Fluid Phase Equilibria, Jg. 494 (2019-08-01), S. 115-124
Online
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Zugriff:
Solvent polarity switched by CO2 of 1,8-Diazabicyclo [5.4.0] undec-7-ene (DBU) + alcohol mixture was investigated on the effect of alcohol species and DBU mole fraction. The alcohols used in this work were ethylene glycol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol and 1-octanol. Kamlet – Taft parameter was applied for the evaluation of the solvent polarity of DBU + alcohol mixture treated by CO2. Ultraviolet–visible spectra of a solvatochromic dye N, N-Dimethyl-4-nitroaniline was used for the determination of the Kamlet – Taft parameter. The DBU mixture with ethylene glycol provides the switchable polarity by CO2 larger than those with other alcohol. The switchable polarity of DBU + ethylene glycol and DBU + 1-propanol mixtures increases with the mole fraction of DBU. A molecular information from quantum calculation can provide the modeling of the switchable polarity by CO2. The Kamlet – Taft parameter of DBU + alcohol mixture is estimated from the molecular surface charge density. The estimated Kamlet – Taft parameter of DBU + alcohol mixture represents the experimental data within the absolute deviation 0.1.
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Controlled polarity of CO2 switchable solution with DBU and alcohols
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Autor/in / Beteiligte Person: | Shimoyama, Yusuke ; Yingquan, Hao |
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Zeitschrift: | Fluid Phase Equilibria, Jg. 494 (2019-08-01), S. 115-124 |
Veröffentlichung: | Elsevier BV, 2019 |
Medientyp: | unknown |
ISSN: | 0378-3812 (print) |
DOI: | 10.1016/j.fluid.2019.04.032 |
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