CO2 selective dynamic two-dimensional ZnII coordination polymerElectronic supplementary information (ESI) available: A TG profile, a photo image after 50 °C treatment, and PXRD patterns. CCDC 911186. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt51729b

A CO 2 selective dynamic two-dimensional (2D) MOF system, [Zn(glu)(μ-bpe)]·2H 2 O ( I ·2H 2 O) (glu = glutarate, bpe = 1,2-bis(4-pyridyl)ethylene), is prepared. Based on variable temperature PXRD patterns, I ·2H 2 O exhibits a structural transformation of the framework upon desolvation. Various gas sorption analyses at low temperatures reveal that solvent-free I selectively adsorbs CO 2 over N 2 , H 2 , and CH 4 . Stepped CO 2 isotherms for solvent-free I with a large hysteresis between adsorption and desorption branches at 196 K indicate that I is a dynamic framework. Moreover, I ·2H 2 O shows efficient heterogeneous catalytic reactivity for transesterification of various esters. The catalyst can be recycled multiple times without losing its original activity. A bifunctional CO 2 selective dynamic two-dimensional MOF, [Zn(glu)(μ-bpe)]·2H 2 O, shows stepped CO 2 isotherms and heterogeneous catalytic reactivity for transesterification.