Diffusion Mechanism in Choline Chloride Based Deep Eutectic Solvents: The Role of Hydrogen Bonding Network

Choline chloride (ChCl) based DESs are among the most prominent variety owing to their large availability and ease of preparation. But the microscopic diffusion mechanisms which are crucial for their applicability are not yet comprehensively understood. Our previous investigations on acetamide based DESs have revealed that molecular diffusion processes are correlated with the nature of hydrogen bond (H-bond) network and relaxation. In the proposed experiment, we aim to explore these correlations pertaining to the dynamics of cholinium ions in reline, glyceline and ethaline DESs, which are mixtures of ChCl with urea, glycerol and ethylene glycol, respectively. The results of the study will establish a link between the microscopic dynamical landscape and H-bond network enabling a deeper understanding about the origin of the bulk transport properties in these industrially relevant DESs.