Alotaibi Mshari A, Malik Tabassum, Naeem A, Khan Amir Sada, Ud Din Israf, Shaharun Maizatul S
Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, 16278, Al-Kharj, Saudi Arabia.
National Centre of Excellence in Physical Chemistry, University of Peshawar, Pakistan.
Heliyon. 2024 Nov 19;10(22):e40521. doi: 10.1016/j.heliyon.2024.e40521. eCollection 2024 Nov 30.
Deep eutectic solvents are a novel class of solvents that have gained much attention with time due to their biodegradability, non-volatility, non-toxicity and low-cost. In this work, a novel ternary deep eutectic solvent (TDES) was synthesized using ethaline (ChCl:EG) and glycine, with the addition of carboxylic acids. The synthesized material was characterized through Fourier-transform infrared spectroscopy (FTIR). While the thermal stability and physical properties such as density, viscosity, surface tension and refractive index were also determined). To estimate the critical properties, modified version of Lyderson-Joback-Reid (LJR) and Lee-Kesler mixing (Alkhatib et al., 2020) [1] methods were used. The density of the DES was calculated using the Spencer and Danner correlation and the obtained values were compared with experimental data. FTIR analysis confirmed that hydrogen bonding is the main driving force responsible for the formation of the deep eutectic solvents. The physical properties of the binary DES system, such as viscosity, density,and thermal stability of the system were enhanced after the incorporation of a third component (carboxylic acid) to the system. However, the surface tension of the TDES system decrease with the increasing amounts of the third component, likely due to increase in the void radius of the TDES. Thus investigation is considering as novel work to check the influence of carboxylic acids on the physical properties of binary deep eutectic solvent systems.
深共熔溶剂是一类新型溶剂，随着时间的推移，因其生物降解性、不挥发性、无毒和低成本而备受关注。在这项工作中，使用乙胺（氯化胆碱：乙二醇）和甘氨酸，并添加羧酸，合成了一种新型三元深共熔溶剂（TDES）。通过傅里叶变换红外光谱（FTIR）对合成材料进行了表征。同时还测定了热稳定性以及密度、粘度、表面张力和折射率等物理性质。为了估算临界性质，使用了Lyderson-Joback-Reid（LJR）的改进版本和Lee-Kesler混合法（Alkhatib等人，2020年）[1]。利用Spencer和Danner关联式计算了深共熔溶剂的密度，并将所得值与实验数据进行了比较。FTIR分析证实，氢键是深共熔溶剂形成的主要驱动力。在二元深共熔溶剂体系中加入第三种组分（羧酸）后，体系的物理性质，如粘度、密度和热稳定性得到了增强。然而，TDES体系的表面张力随着第三种组分含量的增加而降低，这可能是由于TDES空穴半径的增加所致。因此，该研究被视为一项新颖的工作，以检验羧酸对二元深共熔溶剂体系物理性质的影响。
