A five-fold interpenetrated metal-organic framework showing a large variation in thermal expansion behaviour owing to dramatic structural transformation upon dehydration-rehydration.

A five-fold interpenetrated metal organic framework (MOF) has been shown to exhibit anomalous thermal expansion due to the combined effect of hinge-like motion and sliding of individual diamondoid networks. Upon dehydration, the MOF undergoes dramatic structural changes, thereby altering its thermal expansion behaviour to a large extent.