基于偶氮苯的离子液体表面活性剂在油和水之间的光触发可逆相转移。

Photo-Triggered Reversible Phase Transfer of Azobenzene-Based Ionic Liquid Surfactants between Oil and Water.

机构信息

Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China.

出版信息

Int J Mol Sci. 2019 Apr 4;20(7):1685. doi: 10.3390/ijms20071685.

DOI:10.3390/ijms20071685

PMID:30987314

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6479859/

Abstract

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 -isomers is not beneficial for the transfer.

摘要

化合物在两相之间的可逆相转移在广泛的领域中有许多应用，离子液体已被广泛用作潜在的功能溶剂和催化剂。然而，目前尚未有报道称离子液体可以在光的触发下在有机相和水相之间发生可逆相转移。在本工作中，通过交替辐照紫外光和可见光，研究了六种基于偶氮苯的离子液体表面活性剂在有机相和水相之间的可逆相转移。详细考察了影响转移效率的因素，如离子液体表面活性剂的化学结构和浓度、平衡光异构化程度以及离子液体表面活性剂的聚集状态等。结果表明，在最佳条件下，转移效率大于 89%，离子液体表面活性剂的平衡光异构化程度是决定其转移效率的主要因素，而 -异构体的聚集不利于转移。