Prediction of Partition Coefficients in SDS Micelles by DFT Calculations
| Autor: | Leila Saranjam, Vasil Simeonov, Sergio Madurga, Francesc Mas, Miroslava Nedyalkova, Elisabet Fuguet |
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| Rok vydání: | 2021 |
| Předmět: |
Octanol
Physics and Astronomy (miscellaneous) Cyclohexane General Mathematics Analytical chemistry computational prediction partition coefficient DFT Micellar electrokinetic chromatography logP chemistry.chemical_compound Sulfat de sodi micelle QA1-939 Computer Science (miscellaneous) SDS Micelles Density functionals Heptane Chemistry Micel·les Solvation Teoria del funcional de densitat Hybrid functional Solvent Partition coefficient Sodium sulfate Chemistry (miscellaneous) Mathematics |
| Zdroj: | Symmetry, Vol 13, Iss 1750, p 1750 (2021) Dipòsit Digital de la UB Universidad de Barcelona Symmetry Volume 13 Issue 9 |
| ISSN: | 2073-8994 |
| Popis: | A computational methodology using Density-Functional Theory (DFT) calculations was developed to determine the partition coefficient of a compound in a solution of Sodium Dodecyl Sulfate (SDS) micelles. Different sets of DFT calculations were used to predict the free energy of a set of 63 molecules in 15 different solvents with the purpose of identifying the solvents with similar physicochemical characteristics to the studied micelles. Experimental partition coefficients were obtained from Micellar Electrokinetic Chromatography (MEKC) measurements. The experimental partition coefficient of these molecules was compared with the predicted partition coefficient in heptane/water, cyclohexane/water, N-dodecane/water, pyridine/water, acetic acid/water, decan-1-ol/water, octanol/water, propan-2-ol/water, acetone/water, propan-1-ol/water, methanol/water, 1,2-ethane diol/water, dimethyl sulfoxide/water, formic acid/water, and diethyl sulphide/water systems. It is observed that the combination of pronan-1-ol/water solvent was the most appropriated to estimate the partition coefficient for SDS micelles. This approach allowed us to estimate the partition coefficient orders of magnitude faster than the classical molecular dynamics simulations. The DFT calculations were carried out with the well-known exchange correlation functional B3LYP and with the global hybrid functional M06-2X from the Minnesota functionals with 6-31++G ** basis set. The effect of solvation was considered by the continuum model based on density (SMD). The proposed workflow for the prediction rate of the participation coefficient unveiled the symmetric balance between the experimental data and the computational methods. |
| Databáze: | OpenAIRE |
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