Kinetic Gate-Opening Process in a Flexible Porous Coordination Polymer

Open the gate! A porous coordination polymer shows abrupt changes in its adsorption isotherm with guest‐dependent gate‐opening pressure (see picture). Kinetic analysis reveals that adsorption with structure transformation follows a gate‐opening model, in which adsorption proceeds through the formation of an intermediate by a gate‐opening process. This process provides a significant difference in onset pressure between similar gas molecules.