以金属-有机框架为乳化剂制备超临界流体、离子液体乳液的研究

Metal-organic framework (MOF) is a new class of porous material and has application potential in different fields. To control the self-assemblies of MOF nanoparticles at liquid-liquid interface is of great importance both from the points of view of scientific research and practical applications. Supercritical fluid (SCF) and ionic liquid (IL) are green solvents with many unique features. In this program, we will study the formation of emulsions in SCF or IL using MOF as emulsifiers. Different techniques will be carried out to determine the properties and microstructures of the emulsions and the correlation between the MOF structures and the emulsion properties will be investigated. To well understand the mechanism of self-assemblies of MOF nanoparticles at liquid-liquid interface and the stabilization effect of MOF on emulsions, the interactions between solvent and metal ions, solvent and linkers, metal ions and linkers will be discussed. Furthermore, the emulsion will be applied to the construction of MOF superstructures and the catalytic activity of the reconstructed MOFs for chemical reactions will be explored. In comparison with the traditional emulsions, this novel kind of emulsion has many advantages. For example, the structure and properties of the emulsions can be easily adjusted by the structure of MOF and pressure of SCF, the formation and breakage of emulsions can be controlled by SCF pressure, SCF can be easily removed, etc. The research of this program is an interdisciplinary study of colloid chemistry, thermodynamics, green chemistry and material science and the results will expand the scope of studies on emulsion, MOF, supercritical fluid, and IL.

金属-有机框架（MOF）是由金属离子和有机配体组成的配位聚合物，在许多领域具有广泛的应用。MOF材料的特殊结构赋予它一定的两亲性，研究MOF在界面的组装及其对乳液的稳定作用是具有重要意义的前沿课题。超临界流体、离子液体是具有许多特性的绿色溶剂。本项目将开展以MOF为乳化剂、超临界CO2和离子液体中乳液的形成、性质及其应用探索研究。制备一系列具有特殊结构和性质的新型乳液体系；探讨MOF结构与乳液性质的关系以及乳液中各种相互作用的变化规律，揭示MOF在液-液界面自组装和稳定乳液的规律和机理；在乳液中制备一些用传统方法难以制备的、具有高级组装结构的MOF材料，在MOF结构对化学反应活性和选择性的调控规律和机理方面获得深入认识。这是胶体化学、化学热力学、绿色化学、材料科学等学科相互交叉渗透的新课题。开展相关研究不但将促进相关学科的发展，而且将拓宽乳液、MOF、超临界流体、离子液体的研究和应用范围。

本项目围绕金属-有机框架（MOF）稳定的乳液的形成、性质及其应用开展研究。在超临界流体、水等溶剂中构建了一系列具有特殊结构和性质的新型乳液体系；探讨了MOF结构与乳液性质的关系以及乳液中各种相互作用的变化规律，揭示了MOF在液-液界面自组装和稳定乳液的规律和机理；在乳液中制备了一些用传统方法难以制备的、具有高级组装结构的MOF和MOF基材料，开发了MOF稳定的乳液中高效化学反应的新途径。在此基础上，进一步拓展了氧化石墨烯、g-C3N4等纳米材料稳定的新型乳液的形成及其性能研究。这是胶体化学、化学热力学、绿色化学、材料科学、催化等学科相互交叉渗透的新课题。相关研究拓宽了乳液、MOF、超临界流体等的研究和应用范围，具有重要的理论和实际意义。研究成果发表学术论文39篇，其中SCI收录论文38篇。申请专利2项，其中1项已授权。在国内外学术会议做邀请报告23次。