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Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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Structural Features of β-Cyclodextrin Solvation in the Deep Eutectic Solvent, Reline.
Alessandro Triolo1, Fabrizio Lo Celso1,2, Olga Russina1,3
1Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), 00133 Rome, Italy.
The Journal of Physical Chemistry. B
|February 26, 2020
Summary
Deep eutectic solvent reline significantly enhances beta-cyclodextrin solubility, overcoming aggregation issues. This breakthrough enables high-concentration, stable cyclodextrin solutions for novel applications.
Area of Science:
- Supramolecular Chemistry
- Materials Science
Background:
- Native cyclodextrins (CDs) exhibit amphiphilic properties, enabling encapsulation for applications like drug nanodelivery.
- Poor solubility and aggregation of CDs in conventional solvents limit their broader use.
Purpose of the Study:
- To investigate the solubility and aggregation behavior of beta-cyclodextrin (β-CD) in the deep eutectic solvent reline.
- To explore the molecular interactions governing β-CD solvation in reline.
Main Methods:
- Small-angle X-ray scattering (SAXS) to assess solubility and aggregation.
- Molecular dynamics (MD) simulations to elucidate microscopic interactions.
Main Results:
- Reline dissolves large amounts of β-CD (≥800 mg/mL), a significant improvement over water (18 mg/mL).
- No aggregation phenomena were observed for β-CD in reline.
- MD simulations revealed favorable solvation of β-CD through hydrogen bonding and hydrophobic interactions with reline components.
Conclusions:
- Deep eutectic solvent reline provides a highly effective and environmentally responsible medium for dissolving β-CD at unprecedented concentrations without aggregation.
- This finding opens new avenues for advanced applications of cyclodextrins in various fields.
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