Photo-Triggered Reversible Phase Transfer of Azobenzene-Based Ionic Liquid Surfactants between Oil and Water
Photo-Triggered Reversible Phase Transfer of Azobenzene-Based Ionic Liquid Surfactants between Oil and Water
复制标题
光引发偶氮苯基离子液体表面活性剂在油和水之间的可逆相转移
DOI：
10.3390/ijms20071685
复制
发表时间：
2019
影响因子：
5.6
通讯作者：
Wang Jianji
中科院分区：
文献类型：
--
作者：
Li Zhiyong;Feng Ying;Yuan Xiaoqing;Wang Huiyong;Zhao Yuling;Wang Jianji
化合物在两个不互溶的液相之间的可逆相转移具有广泛的应用领域，离子液体作为潜在的功能溶剂和催化剂得到了广泛的应用。然而，离子液体在有机相和水相之间的光引发可逆相转移迄今未见报道。本文通过紫外光和可见光交替照射，研究了六种偶氮苯基离子液体表面活性剂在有机相和水相之间的可逆相转移。研究了离子液体表面活性剂的化学结构、浓度、平衡光异构化程度、离子液体表面活性剂的聚集状态等因素对转移效率的影响。结果表明，在最佳条件下，离子液体表面活性剂的转移效率大于89%，平衡光异构化程度是决定离子液体表面活性剂转移效率的主要因素，顺式异构体的聚集不利于离子液体表面活性剂的转移。
The reversible phase transfer of compounds between two immiscible liquid phases has many applications in a wide range of fields, and ionic liquids have been widely used as potential functional solvents and catalysts. However, photo-triggered reversible phase transfer of ionic liquids between the organic phase and water phase has not been reported so far. In the present work, the reversible phase transfer of six kinds of azobenzene-based ionic liquid surfactants between the organic phase and water phase is investigated by alternative irradiation of UV and visible light. Factors affecting the transfer efficiency, such as chemical structure and concentration of the ionic liquid surfactants, equilibrium photo-isomerization degree, and the aggregation state of ionic liquid surfactants are investigated in detail. It is shown that transfer efficiency greater than 89% was achieved under optimal conditions, equilibrium photo-isomerization degree of the ionic liquid surfactants is the main factor to determine their transfer efficiencies, and the aggregation of cis-isomers is not beneficial for the transfer.