Demonstration of permanent porosity in flexible and guest-responsive organic zeolite analogs (now called MOFs).

In the late 1990s rigorous proof of coordination polymer framework or MOF integrity in the absence of guest molecules still needed to be developed. A study by Kepert and Rosseinsky presented X-ray crystal structure refinements as one of the first definitive demonstrations of the retention of structural integrity of a porous coordination polymer framework upon complete desolvation and guest re-adsorption.