Pressure-responsive curvature change of a "rigid" geodesic ligand in a (3,24)-connected mesoporous metal-organic framework.

A (3,24)-connected mesoporous metal-organic framework, PCN-69, was synthesized by linking a hexatopic ligand btti with dicopper paddlewheel clusters. This material has rigid connectivity but a flexible framework, which has been attributed to a curvature change of the ligand.