分子、离子、纳米粒子和超分子自组装体在不互溶两相间的相转移在催化、反应、分离、材料制备和药物输送等领域发挥着重要的作用，但是目前尚未见利用光照调控离子液体相转移的研究报道。本项目拟根据离子液体的可设计性及其结构-性质关系，设计在离子液体的阳离子或阴离子上植入对光响应的偶氮苯、二芳基乙烯、或螺吡喃等结构单元来制备光响应离子液体。在此基础上，利用热力学、谱学、量子化学计算等方法，系统研究阳离子的结构、烷基链的长度、官能团的特性、阴离子的类型对这些离子液体与水等分子溶剂的相互作用、离子液体在分子溶剂中的自组装、离子液体溶液的物理化学性质的影响规律和微观机制，分析光照对离子液体在分子溶剂中的溶剂化、自组装结构以及离子液体在两相间可逆相转移的调控规律，探索离子液体在光的驱动下发生可逆相转移的分子本质，为新型光响应离子液体的理性设计和这些离子液体相转移的有效调控提供重要的科学信息。

Phase transfer of molecules, ions, nanoparticles and supramolecular assemblies between two immiscible phases is highly desirable for many innovative applications, such as phase transfer catalysis, reaction, separation, material preparation and drug delivery. However, no study on phase transfer of ionic liquids triggered by light has been reported up to now. In this project, we plan to design and synthesize light-responsive ionic liquids with light-responsive structural units such as azobenzene, diarylethene, or spiropyrane groups in their cations or anions based on the designability and structure – property relationship of ionic liquids. By using the methodologies of thermodynamic, spectroscopic and quantum chemistry calculations, we are attempted to systematically investigate the effect of the cationic structure, alkyl chain length, functional group property and anionic type of the ionic liquids on the interactions between light-responsive ionic liquids and molecular solvents, self assemblies of these ionic liquids in molecular solvents and physicochemical properties of ionic liquids mixtures with molecular solvents as well as the microscopic mechanism. The regulation role of light irradiation on the solvation of ionic liquids in molecular solvents, self assembly structures and the reversible phase transfer of ionic liquids between two phases will be studied. The molecular nature of phase transfer of the ionic liquids is going to be explored. These results are expected to provide important scientific information on the rational design of new light responsive ionic liquids and the effective regulation and control of their phase transfer between two immiscible phases.