离子液体
丁酸
酒
丁醇
化学
丁酸盐
混合(物理)
基础(拓扑)
有机化学
丁胺
离子键合
乙醇
胺气处理
催化作用
离子
物理
数学
数学分析
量子力学
发酵
作者
X. Y. Zhang,Yue Zhang,Haoran Li,Jia Yao
标识
DOI:10.1016/j.gce.2024.03.005
摘要
Solvents are commonly added into protic ionic liquids (PILs) to reduce viscosity, thereby improving their practical application. Understanding the relationship between the structure and properties of PILs mixed with solvents is also essential for tailoring specific applications, however, such research is limited. In this study, we measured and compared the density, viscosity, and conductivity of three mixed systems: n-butylammonium butyrate ionic liquid (PIL) mixing with N-butyric acid (PrCOOH); PIL-N-butylamine (BuNH2); PIL-N-butanol (BuOH). Small- and wide-angle scattering (S/WAXS), molecular dynamics (MD) simulation, and electron paramagnetic resonance (EPR) techniques were used to explore their inherent structural differences. The results indicate that the properties of the PIL-BuOH and PIL-PrCOOH systems exhibit more overall similarity in trends compared to the PIL-BuNH2 system, however, when the molar fraction of alcohol or acid exceeds 0.8, structural differences between the two systems lead to the differences in properties. The hydrogen bond network between the BuOH molecules outside the ion cluster leads to higher viscosity and conductivity than the PIL-PrCOOH system, while, the strong hydrogen bond between PrCOOH and anions will replace the position of cations and form spherical clusters. This research highlights how distinct structures influence diverse properties, providing deeper insights into the structure-property relationship.
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