1D Supramolecules Self-Assembled by Nickel(II) Macrocycles with Carboxylate Ligands

Three new macrocyclic nickel(II) supramolecules, {[Ni( L1 )(Hmal) 2 ]} n ( 1 ), {[Ni( L1 )(Hdipic) 2 ]·(H 2 O) 2 ·DMF} n ( 2 ) and {[Ni( L1 )(Hisoph) 2 ]·2DMF} n ( 3 ) ( L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,0 1.18 ,0 7.12 ]docosane, mal = maleate, dipic = 2,6-pyridinedicarboxylate, isoph = isophthalate), have been synthesized and characterized by analytical, spectroscopic and X-ray diffraction methods. The complexes 1 – 3 show that the central nickel(II) ions are coordinated axially by two monodentate carboxylate ligands, respectively. The structures of 1 – 3 extend their mononuclear structures to form 1D supramolecules through hydrogen bonds. In 3 , each 1D chain interacts together to form a 2D layer through hydrogen bonds between the Hisoph ligands. Graphical Abstract Three new macrocyclic nickel(II) supramolecules, {[Ni( L1 )(Hmal) 2 ]} n ( 1 ), {[Ni( L1 )(Hdipic) 2 ]·(H 2 O) 2 ·DMF} n ( 2 ) and {[Ni( L1 )(Hisoph) 2 ]·2DMF} n ( 3 ) have been synthesized and characterized. The complexes 1 – 3 show that the central nickel(II) ions are coordinated axially by two monodentate carboxylate ligands, respectively. The structures of 1 – 3 extend their mononuclear structures to form 1D supramolecules through hydrogen bonds. In 3 , each 1D chain interacts together to form a 2D layer through hydrogen bonds between the Hisoph ligands.