• des
• dynamics
• nmr
• phase properties
• ssnmr

Organic solvents are extensively used in industrial processes, causing environmental and health concerns. Ionic Liquids (ILs) were explored as alternatives since they present low volatility and low flammability, but they pose toxicity issues. Deep Eutectic Solvents (DES) emerged as promising alternatives, resembling the properties of ILs presumably without the associated toxicity. DESs have demonstrated substantial potential in various applications, including metal electrodeposition and electropolishing media, organic synthesis media and catalysts, extraction and processing of bioactive compounds, and the processing of biomasses, among others. Understanding the DES dynamics and structure is crucial to better tailor their properties. In this work, a type II DES composed of Choline Chloride and Calcium Chloride Hexahydrate with different addition of water have been considered. This study employs low resolution 1H NMR techniques to investigate the dynamics and phase properties of the DES components. In particular, 1H T1 Fast Field cycling NMR relaxometry provided information on Choline Chloride and water reorientational and translational dynamics, while 1H T2 measurments have beeen employed to investigate the phase transition occuring at different temperatures.