High-connectivity triptycene-based halogen-cluster organic frameworks for high-efficiency proton conductivity

Non-metal organic frameworks (NMOFs) are non-covalent self-assembled structures with good crystallinity, exhibiting potential for expansion and tunability via reticular chemistry. However, the topological networks reported for NMOF assemblies predominantly rely on low-connectivity organic building blocks, and the regulation of building-block connectivity for the assembly of high-connectivity NMOFs remains underexplored. Here, we designed and synthesized a 6-connected triptycene-based building block—hexaamine triptycene ( THA ). Single-crystal X-ray diffraction analysis revealed that the (6,6)-connected nia -type halogen-cluster organic frameworks—a type of NMOF—were obtained via assembling rigid trigonal prismatic THA with hydrogen halides. We successfully synthesized two isoreticular structures— THA.Cl and THA.Br . These ionic frameworks, displaying good potential for scalable production and regeneration, exhibit good proton conductivities.