A novel Cu(II) MCCP based on 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid: First coexistence of boat- and chair-shaped tetranuclear clusters

•The first use of H4nbtc ligand afford a novel 2D Cu(II) MCCP (1).•In 1 boat- and chair-shaped CuII4 clusters [Cu4(μ3-OH)2]6+ coexist unprecedentedly.•Variable-temperature magnetic investigations for 1 have been discussed.

The first use of H4nbtc ligand afford a novel 2D Cu(II) metal-cluster-based coordination polymer (MCCP), [Cu4(nbtc)1.5(μ3-OH)2(H2O)4·8H2O (1) (H4nbtc = 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid), in which the boat- and chair-shaped tetranuclear cooper (II) clusters [Cu4(μ3-OH)2]6+ coexist unprecedentedly. Interestingly, the chair-shaped CuII4 cluster-based 1D ladder chain perfectly threaded into the rectangle windows of the 2D grids constructed by boat-shaped CuII4 clusters and H4nbtc. And the magnetic property has also been investigated.

Graphical abstractThe first use of H4nbtc ligand afforded a novel 2D Cu(II) MCCPs, in which the boat-shaped and chair-shaped CuII4 clusters [Cu4(μ3-OH)2]6 + coexist unprecedentedly. Interestingly, the chair-shaped CuII4 cluster-based 1D ladder chain threaded into the rectangle windows in the 2D grids formed by boat-shaped CuII4 clusters and nbtc ligands.Figure optionsDownload full-size imageDownload as PowerPoint slide