A novel 2D porous polymer constructed by a U‐shaped bis(amidopyridine) ligand and cobalt(II)

Reaction of U‐shaped flexible bis(amidopyridine) ligand L with CoCl2·6H2O in DMF produced a 2D coordination polymer [Co(L)2Cl2]n·4nDMF (1) with 1D channels guesting DMF molecules [L = N,N′-bis((pyridin-3-yl)methyl)pyridine-2,6-dicarboxamide, DMF = N,N′-dimethylformamide]. Complex 1 has corrugated flexible grid-like layers of a (4,4)-connected topology which consists of left- and right-handed helical chains sharing the common Co atoms. Investigation on the thermal stability and porosity shows that the porous network of 1 is rather stable up to 300 °C and has obvious adsorption for N2.