2nd PoMoS, 2nd Meeting on Porous Molecular Solids

MOFs are very versatile materials and are sought after for various properties such as gas sorption and gas selectivity. Through the study of a previously reported microporous metal-organic framework whose pore dimensions can be varied systematically through the judicious choice of suitable rigid 4,4´- bipyridine-type linkers, CO 2 host-guest and guest-guest interactions can be studied. Using single-crystal X-ray diffraction data and framework electrostatic potential maps we elucidated the nature of the CO 2 - MOF interactions that uses several electrostatic interactions to stabilize the CO 2 within the framework channels. [1] Similar to the previous study suitable flexible 4,4´-bipyridine-type linkers were used to synthesise MOFs analogous to the rigid linkers. The flexibility of the pyridyl linkers allowed for the MOFs to undergo a phase transition and subsequent reduction in guest accessible space. Understanding these properties and the role they play in various metal-organics is pivotal to the understanding of not only CO 2 sorption, but also the ligand-MOFs property relationships. [2]