Dynamic Framework Materials and Molecular Machines
Our research focuses on a third dimension in materials design, namely to tailor and control intrinsic dynamic properties. This adds new ways to tailor solid state materials beyond their composition and structure. Such functional dynamics particularly impact properties away from equilibrium and allow establishing out-of-equilibrium processes and structural properties. We investigate tailored dynamics in materials such as metal-organic frameworks (MOFs), covalent-organic frameworks (COFs), and porous organic polymers (POPs). To adress and stimulate framework dynamics we utilize several stimuli such as temperature (negative thermal expansion), pressure (non-linera compressability), gas adsorption (negative gas adsorption). To achieve controllable dynamics on the molecular level we develop and incorporate molecular machines and switches in the pore interior. These responsive molecules can turn a light stimulation into controllable and in the case of molecular motors into directional molecular motion. When incorporated into the lattice of a framework materials an assembly of dynamic gears is obtained that can one day reassemble aspects of a clockwork.