One-dimensional zigzag chain of Cu–Gd coordination polymers derived from chiral hexadentate Schiff base ligands: Synthesis, structure and magnetic properties

One couple of enantiomerically pure chiral Cu II Gd III coordination polymers [Cu(( S , S )-Salcy)Gd(NO 3 ) 3 ·CH 3 OH] n ( 1 ) and [Cu(( R , R )-Salcy)Gd(NO 3 ) 3 ·CH 3 OH] n ( 2 ) [( S , S )-Salcy or ( R , R )-Salcy = ( S , S )- or ( R , R )- N , N ′-(1,2-cyclohexanediylethylene) bis(3-ethoxysalicylideneiminato)dianion], were synthesized and structurally characterized. The self-assembly by intermolecular semicoordination of nitrate to copper(II) formed a one-dimensional zigzag chain structure. Magnetic property studies indicated that 1 and 2 exhibited very strong ferromagnetic interaction ( J = 6.285 and 7.408 cm −1 , respectively) between copper(II) and gadolinium(III) metal centers among the related complexes, although the dihedral angles (8.1° and 8.6°, respectively) of CuO 2 and GdO 2 are a little large.