Covalent Frameworks and Metal-Organic Frameworks

Crystalline porous networks resulting from molecular building blocks (covalent organic frameworks) and surfactant-templated polymer networks that can be graphitized are of interest for their potential electronic and optoelectronic properties. For example, we have recently created the largest crystalline open pore system with 4 nm pore diameter based on condensed aromatic building blocks. This project is presently extended to the condensation of redox-active building blocks into novel mesoporous structures.
We pursue the synthesis of microporous zeolites and micro- and mesoporous metalorganic frameworks with attractive porosity features using microscale high-throughput technologies. Some of these structures have unusual selective ion-exchange properties, others are of interest for their hierarchical porosity. We have discovered that some of these materials can be grown as oriented thin crystal films at the interface of self-assembled molecular monolayers. This morphology is attractive for the design of molecularly selective chemical sensors, for example based upon mass changes on a piezoelectric device or optical changes in a multilayer stack.