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Ternary-like Aqueous Biphasic Systems Composed of Betaine-Polyol Deep Eutectic Solvents and n-Propanol
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-12-19 , DOI: 10.1021/acs.jced.1c00854
Huijuan Li 1 , Shunguo Qiu 1 , Li Chen 1 , Taotao Fan 1 , Xiong Peng 1 , Zongcheng Yan 1
Affiliation  

A deep eutectic solvent (DES)-based aqueous biphasic system (ABS) denotes a clean and highly biocompatible separation and purification technology, but the explanations of the phase formation mechanism and phase behavior of a DES-based ABS are incomplete. To improve the study of the formation mechanism of a DES-based ABS, a new ABS composed of n-propanol (NPA) and DES with betaine as the hydrogen-bond acceptor (HBA) and polyol as the hydrogen-bond donor (HBD) was formed. The phase formation mechanism of this new ABS and the stability of the DES in the ABS were studied. Betaine and three polyols are hydrophilic (log KOW < 0), whereas NPA is relatively hydrophobic (log KOW > 0). Two phases were formed, because the two components of DES were incompatible with the NPA. The molar ratio of the HBA and HBD in the two phases differed, but in the bottom phase of this ABS, the stoichiometric ratio of HBA and HBD was the same as their initial ratio. Under certain conditions, this novel ABS was considered a ternary-like system. The combination of a series of factors, such as HBD hydrophilicity, molar volume, molecular weight, and initial molar ratio of HBA and HBD, affected the final stoichiometric ratio of HBA and HBD in the top phase.

中文翻译:

由甜菜碱-多元醇低共熔溶剂和正丙醇组成的类三元水双相体系

基于深共晶溶剂 (DES) 的水性双相系统 (ABS) 是一种清洁且具有高度生物相容性的分离和纯化技术,但对基于 DES 的 ABS 的相形成机制和相行为的解释还不完整。为改进基于 DES 的 ABS 形成机理的研究,以甜菜碱为氢键受体 (HBA) 和多元醇为氢键供体 (HBD)的正丙醇(NPA) 和 DES组成的新型 ABS形成了。研究了这种新型ABS的相形成机理以及DES在ABS中的稳定性。甜菜碱和三种多元醇是亲水的(log K OW < 0),而 NPA 是相对疏水的(log K OW> 0)。由于 DES 的两个组成部分与 NPA 不兼容,因此形成了两个阶段。两相中 HBA 和 HBD 的摩尔比不同,但在该 ABS 的底部相中,HBA 和 HBD 的化学计量比与其初始比例相同。在某些条件下,这种新型 ABS 被认为是类三元系统。HBD 的亲水性、摩尔体积、分子量以及 HBA 和 HBD 的初始摩尔比等一系列因素的组合影响了上相 HBA 和 HBD 的最终化学计量比。
更新日期:2022-01-13
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