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The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
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Imagine adding a small amount of sugar to a glass of water, stirring until all the sugar has dissolved, and then adding a bit more. You can repeat this process until the sugar concentration of the solution reaches its natural limit, a limit determined primarily by the relative strengths of the solute-solute, solute-solvent, and solvent-solvent attractive forces. You can be certain that you have reached this limit because, no matter how long you stir the solution, undissolved sugar remains. The...
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Solvation Dynamics and Microheterogeneity in Deep Eutectic Solvents.

Srijan Chatterjee1,2, Tubai Chowdhury1,2, Sayan Bagchi1,2

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Deep eutectic solvents

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Deep eutectic solvents (DES) show promise as alternatives to conventional solvents.
  • Microscopic mechanisms of solvation dynamics and hydrogen bonding in DES are not fully understood.

Purpose of the Study:

  • To investigate the microheterogeneity and solvation dynamics in DES.
  • To elucidate the role of hydrogen bonding and system composition in DES properties.

Main Methods:

  • Combined experimental techniques: Vibrational Stark spectroscopy and 2D infrared (2D IR) spectroscopy.
  • Computational approach: Molecular dynamics (MD) simulations.

Main Results:

  • Demonstrated significant influence of DES composition, constituents, and water content on hydrogen bonding networks.
  • Revealed the impact of these factors on solvent dynamics and microheterogeneity.
  • Established a link between nanostructure and solvation dynamics in DES.

Conclusions:

  • Integrated experimental and computational methods provide deep insights into DES.
  • Findings guide the rational design of next-generation DES for specific applications.
  • Advances understanding of complex solvent systems for future innovations.