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

► A novel 2D porous polymer with 1D nano-sized channels are synthesized. ► The title complex has corrugated flexible grid-like layers consisting of left- and right-handed helical chains. ► The title complex is rather stable up to 300 °C and has obvious adsorption for N2.