Structures and Solvation in Deep Eutectic Solvents
(2024)- Abstract
- Deep Eutectic Solvents (DES) are a type of emerging solvent that are gaining in popularity for their versatile and adjustable properties, and components that can be safe, biodegradable and sustainably sourced. Here we investigate the interactions that give rise to their unique properties.
The first paper looks at the question of how chirality in a component effects the DES structure. Many DES components can be derived from biological systems, where chirality is common, and here the difference in solvent structure between choline chloride (ChCL) with L- or DL-tartaric acid (TA) is investigated. We find that while the interaction between the chiral components is slightly altered, the overarching solvent structure remains the same, as the... (More) - Deep Eutectic Solvents (DES) are a type of emerging solvent that are gaining in popularity for their versatile and adjustable properties, and components that can be safe, biodegradable and sustainably sourced. Here we investigate the interactions that give rise to their unique properties.
The first paper looks at the question of how chirality in a component effects the DES structure. Many DES components can be derived from biological systems, where chirality is common, and here the difference in solvent structure between choline chloride (ChCL) with L- or DL-tartaric acid (TA) is investigated. We find that while the interaction between the chiral components is slightly altered, the overarching solvent structure remains the same, as the interactions dominating the solvent structure are between TA and especially chloride.
In the second paper we remove this dominant chloride interaction to look at the structure of a DES comprised of betaine (Bet) and glycerol (Gly), as well as the solvation and effect of adding iron nitrate nonahydrate as a solute. We find significant differences in the hydrogen bonding in comparison to ChCl:Gly based DES, and find that the addition of the small ionic solute induces especially the glycerol – glycerol interactions to become more similar to the ChCl:gly based system. The iron salt also shows significant interactions with different DES components, unlike in Ch:Cl:Urea based systems, where it is dominated by chloride interactions.
How surfactant solubility and self-assembly can be influenced by changing DES components ratios is presented in the third paper. We find that between neat glycerol and 1:4 / 1:2 citric acid (CA) : Gly, the CMC fir cationic surfactants changes in a non-linear fashion, while the often non soluble non ionic surfactants become soluble in the 1:2 mixture. Using small angle scattering, we also find that these surfactans form spherical micelles in 1:2 CA:Gly. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/b0f0befb-719f-422a-bc95-0cfb87352da9
- author
- Bathke, Elly Kim LU
- supervisor
- organization
- publishing date
- 2024
- type
- Thesis
- publication status
- published
- subject
- publisher
- Department of Chemistry, Lund University
- ISBN
- 978-91-8096-049-6
- 978-91-8096-048-9
- project
- Structures and Solvation in Deep Eutectic Solvents
- language
- English
- LU publication?
- yes
- additional info
- Date: 2024-06-05 Time: 09:00 Place: Lecture Hall KC:C, Kemicentrum, Naturvetarvägen 14, Faculty of Engineering LTH, Lund University, Lund. The dissertation will be live streamed, but part of the premises is to be excluded from the live stream. External reviewer(s) Name: Moura, Leila Title: Prof. Affiliation: Queens University Belfast, United Kingdom.
- id
- b0f0befb-719f-422a-bc95-0cfb87352da9
- date added to LUP
- 2024-05-02 16:55:45
- date last changed
- 2024-05-06 16:51:44
@phdthesis{b0f0befb-719f-422a-bc95-0cfb87352da9,
abstract = {{Deep Eutectic Solvents (DES) are a type of emerging solvent that are gaining in popularity for their versatile and adjustable properties, and components that can be safe, biodegradable and sustainably sourced. Here we investigate the interactions that give rise to their unique properties.<br/>The first paper looks at the question of how chirality in a component effects the DES structure. Many DES components can be derived from biological systems, where chirality is common, and here the difference in solvent structure between choline chloride (ChCL) with L- or DL-tartaric acid (TA) is investigated. We find that while the interaction between the chiral components is slightly altered, the overarching solvent structure remains the same, as the interactions dominating the solvent structure are between TA and especially chloride.<br/>In the second paper we remove this dominant chloride interaction to look at the structure of a DES comprised of betaine (Bet) and glycerol (Gly), as well as the solvation and effect of adding iron nitrate nonahydrate as a solute. We find significant differences in the hydrogen bonding in comparison to ChCl:Gly based DES, and find that the addition of the small ionic solute induces especially the glycerol – glycerol interactions to become more similar to the ChCl:gly based system. The iron salt also shows significant interactions with different DES components, unlike in Ch:Cl:Urea based systems, where it is dominated by chloride interactions.<br/>How surfactant solubility and self-assembly can be influenced by changing DES components ratios is presented in the third paper. We find that between neat glycerol and 1:4 / 1:2 citric acid (CA) : Gly, the CMC fir cationic surfactants changes in a non-linear fashion, while the often non soluble non ionic surfactants become soluble in the 1:2 mixture. Using small angle scattering, we also find that these surfactans form spherical micelles in 1:2 CA:Gly.}},
author = {{Bathke, Elly Kim}},
isbn = {{978-91-8096-049-6}},
language = {{eng}},
publisher = {{Department of Chemistry, Lund University}},
school = {{Lund University}},
title = {{Structures and Solvation in Deep Eutectic Solvents}},
url = {{https://lup.lub.lu.se/search/files/182825398/364156_1_G5_Elly_K_B_spikning_signed_page_removed_unpublished_removed.pdf}},
year = {{2024}},
}