TY - JOUR
T1 - Novel “Acid Tuned” Deep Eutectic Solvents Based on Protonated L-Proline
AU - Janicka, Patrycja
AU - Przyjazny, Andrzej
AU - Boczkaj, Grzegorz
PY - 2021/7/1
Y1 - 2021/7/1
N2 - The paper presents new types of deep eutectic solvents (DESs) based on L-proline protonated using three different acids (hydrochloric, sulfuric and phosphoric)and playing the role of a hydrogen bond acceptor(HBA). Glucose and xylitol were used as hydrogen bond donors (HBD). A series of deep eutectic solvents with various mole ratios were obtained for the systems L-proline: glucose and L-proline: xylitol. Density, melting point, pH and viscosity of the synthesized DESs were determined along with the effect of water content, mole fraction of the HBA in DES and temperature on properties of the DESs. A wide range of densities (1343–1606 kg/m3), viscosities at 20 °C (699.6–48,590 mPa·s) and pH of 0.1 M DES solutions (1.578–2.456) make the obtained deep eutectic solvents potentially applicable in numerous technological processes, extractions as well as in analytical techniques, including microextraction. Components of these DESs are of natural origin and non-toxic, thus environmentally friendly and suitable for food as well as pharmaceutical industry.
AB - The paper presents new types of deep eutectic solvents (DESs) based on L-proline protonated using three different acids (hydrochloric, sulfuric and phosphoric)and playing the role of a hydrogen bond acceptor(HBA). Glucose and xylitol were used as hydrogen bond donors (HBD). A series of deep eutectic solvents with various mole ratios were obtained for the systems L-proline: glucose and L-proline: xylitol. Density, melting point, pH and viscosity of the synthesized DESs were determined along with the effect of water content, mole fraction of the HBA in DES and temperature on properties of the DESs. A wide range of densities (1343–1606 kg/m3), viscosities at 20 °C (699.6–48,590 mPa·s) and pH of 0.1 M DES solutions (1.578–2.456) make the obtained deep eutectic solvents potentially applicable in numerous technological processes, extractions as well as in analytical techniques, including microextraction. Components of these DESs are of natural origin and non-toxic, thus environmentally friendly and suitable for food as well as pharmaceutical industry.
KW - Deep eutectic solvents
KW - NADES
KW - Hydrophobic deep eutectic solvents
KW - Synthesis
KW - Green Chemistry
UR - https://digitalcommons.kettering.edu/naturalsci_facultypubs/12
U2 - 10.1016/j.molliq.2021.115965
DO - 10.1016/j.molliq.2021.115965
M3 - Article
VL - 333
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
ER -