1-D, 2-D and 3-D coordination polymers assembled from polynuclear COII units based on the isophthalate(-2) ligand

Abstract Three polymeric complexes containing polynuclear Co II units, [Co 2 (Cbtp) 2 (ip) 2 ] ( 1 ), [N(CH 3 ) 4 ] 2 [Co 3 (ip) 4 ] ( 2 ), and [{Co 7 (ip) 5 (μ-OH) 4 }(μ-bpp) 2 ]·2(H 2 O) ( 3 ), have been prepared by solvothermal synthesis. Isophthalic acid (H 2 ip) has been used for the construction of polynuclear Co II units, and three auxiliary ligands, namely Cbtp, quinazoline, and bpp, have also been employed to change nuclearity of Co II unit and the dimensionality of polymeric Co II compounds: 1-D structure containing dinuclear Co II units with Cbtp, 2-D structure containing trinuclear Co II units without quinazoline, and 3-D structure containing heptanuclear Co II units with bpp. The gas sorption study of 3 revealed a relative high uptake of CO 2 over N 2 because of small dimension of channels. The thermal stabilities and magnetic properties of these complexes were also examined.