Experimental Study on the Solvation Behavior in Aqueous Choline Chloride-based Deep Eutectic Solutions by Solvatochromic Dyes
Publish place: Materials Chemistry Horizons، Vol: 1، Issue: 3
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_MCH-1-3_003
تاریخ نمایه سازی: 30 آبان 1401
Abstract:
The preferential solvation behavior of three solvatochromic indicators (۴-Nitroaniline, N, N-dimethyl-۴-nitroaniline, and ۲,۶-diphenyl-۴-(۲,۴,۶-tri phenyl pyridinium-۱-yl)phenolate in some deep eutectic solvents (DESs) including choline chloride + glycerol (۱:۲), choline chloride + ethylene glycol (۱:۲) and choline chloride + lactic acid (۱:۲), and their mixtures with water was investigated at constant temperature ۲۹۸.۱۵±۰.۱ K by using UV–vis absorption measurements. The solvent exchange model was successfully utilized to analyze the spectral shifts of these dyes to make a description of the preferential solvation behavior of the solute in mixed solvents under study. It was found that the solvation shell of the dyes is mainly affected by the solvent-solvent and solvent-solute interactions, especially hydrogen bonding. The preferential solvation parameter shows that in all aqueous mixtures of DES, the order of preferential solvation for the solvatochromic dyes is as DES > (water-DES) complex > water. The contribution of water to the preferential solvation of dyes is low. This is probably due to the great affinity of water molecules for the self-association and the strong interaction between DES and the dyes.
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Authors
Farzaneh Hosseinpoor
School of Chemistry, Damghan University, ۳۶۷۱۶-۴۱۱۶۷ Damghan, Iran
Morteza Jabbari
School of Chemistry, Damghan University, ۳۶۷۱۶-۴۱۱۶۷ Damghan, Iran