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  • Title: Deep eutectic solvents for antiepileptic drug phenytoin solubilization: thermodynamic study.
    Author: Shekaari H, Zafarani-Moattar MT, Mokhtarpour M, Faraji S.
    Journal: Sci Rep; 2021 Dec 16; 11(1):24081. PubMed ID: 34916530.
    Abstract:
    Thermodynamic investigations provide information about the solute-solvent interactions in the selection of the proper solvent for different fields of pharmaceutical sciences. Especially, the study of antiepileptic drugs in solutions (ethanol/co-solvent) has been a subject of interest owing to their effect in the systems using interaction with a number of important biological membranes. This work focuses on the measurement of density and speed of sound of the phenytoin (PTH) in ethanol/deep eutectic solvents (choline chloride:ethylene glycol, and choline chloride:glycerol) solutions as the innovative class of green solvents at temperature range (288.15 to 318.15) K. It was determined Hansen solubility parameters for assessment of PTH interactions in the solvent media. Some thermophysical parameters including apparent molar volumes Vϕ, apparent molar isobaric expansion [Formula: see text], and Hepler's constant, apparent molar isentropic compressibility κφ were obtained and calculated using these data. To correlate  the Vϕ and κφ values, the Redlich-Meyer equation was used to calculate the number of quantities containing standard partial molar volume and partial molar isentropic compressibility. Finally, [Formula: see text] values showed a strong interaction between PTH and solvent (ethanol/DES (ChCl:EG)). The thermodynamic analysis of the studied system also plays a crucial role in the pharmaceutical industry.
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