Metal-organic Frameworks ( Cyrstal structure-function relationship)

Defects, the sites of atoms or ions in the crystal framework locally disrupted, owing to the absence or dislocation of the atoms or ions. There are two types of defects in MOFs: (i) ligand defects, and (ii) metal cluster (node) defects. The formation of structural defects is usually accompanied by bond breakage and reorganization, lattice distortion and electron localization, which induce property changes in various applications. But on the other hand, it is found that by controlling the structural defects, some characteristics of the material can be significantly improved. Particularly, the control of lattice defects in semiconductor materials can modulate electronic and energy band structures, carrier concentrations, and even conductivity. Considering the subtle effects of defects on performance, especially proton conductivity performance, the use of suitable models for the rational design of structural defects is important for a deeper understanding of the relationship between defect control and performance. Therefore, this project refers to the synthesis of highly defective and stable Zr-MOFs to accommodate an ionic liquid with attractive proton conductivity through hemilabile linker strategy to reveal the significance of defects in the host-guest accommodation mechanism of MOFs as ionic liquid carriers and to provide a reference for the design of subsequent host-guest composites.