CO2 selective dynamic two-dimensional ZnII coordination polymer

A CO2 selective dynamic two-dimensional (2D) MOF system, [Zn(glu)(mu-bpe)]center dot 2H(2)O (I center dot 2H(2)O) (glu = glutarate, bpe = 1,2-bis(4-pyridyl)ethylene), is prepared. Based on variable temperature PXRD patterns, I center dot 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 CO2 over N-2, H-2, and CH4. Stepped CO2 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 center dot 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.