Porous cobalt(ii)-imidazolate supramolecular isomeric frameworks with selective gas sorption propertyElectronic supplementary information (ESI) available: Experimental and additional structures; ΔHadscalculations; PXRD patterns and TGA data of 1and 2. CCDC 813262and 813263. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1cc10899a

Two porous supramolecular isomeric frameworks show unique sorption properties, one with temperature dependent stepwise and hysteretic selective sorption of CO2while the other one shows gas uptake capacity for CO2, N2, H2and CH4at low temperature and selective sorption of CO2over N2around room temperature. [ABSTRACT FROM AUTHOR]