Porous Metal Organic Framework Fluid based on Coordinative Ionic Liquid

• 1、Institute of Chemical Biology and Nanomedicine, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082

Abstract：Metal-Organic Framework (MOF) is a type of porous crystalline material with high surface area. Conventional MOF materials are generally polycrystalline solid powders, or large-grained single crystal materials, which do not have liquid mobility, thus limiting their use in gas and small molecule transport, energy transfer, and material exchange. In this work, we reprot a coordination chemistry-based approach to prepare MOF materials with liquid mobility. Based on the unsaturated coordination sites (CUSs) on the surface of nano-sized MOF particles (nanoMOFs), we designed and synthesized a bulky ionic liquid with coordination sites for both cations and anions.Because of the strong coordinative bonds between MOF nanoparticles and the ionic liquid molecules, nanoMOFscan be stablizedwithin the ionic liquid, imparting fluidity to the MOF material. Due to the large size of the coordinative ionic liquid synthesized and the strong interactions with the nanoMOF, the obtained MOF liquid maintains porosity and exhibits high stability and adjustable mechanical properties.

Keywords： Metal-organic framework Ionic liquid Unsaturated coordination sites, Mobility