Distinct interpenetrated metal–organic frameworks constructed from crown ether-based strut analogue

Rigid struts containing crown ether units (benzo-12-crown-4 and benzo-15-crown-5) coordinate with Zn4O(CO2)6 clusters, affording two different interpenetrated metal–organic frameworks (MOFs), i.e., benzo-12-crown-4-based MOF presents a “close contact” interpenetration mode, while the benzo-15-crown-5-based one has a “body center” interpenetration mode.