Single Crystal of New Nanostructure Self-Assembled Copper–Cyanide and Hexamethylenetetramine as an Efficient Supramolecular Coordination Polymer Catalyst

Yellow prismatic nanoparticles of the supramolecular coordination polymer (SCP) [Cu 6 (CN) 7 (C 6 H 12 N 4 ) 2 (OH 3 )], 1 were obtained by the reaction of K 3 [Cu(CN) 4 ] and hexamethylenetetramine (hmt) in presence of Me 3 SnCl at ambient conditions. The X-ray structure of 1 consists of many rhombic [(Cu) 2 µ 3 –(CN) 2 ] motifs which construct eight fused cyclic rings accommodating two hmt ligands. The copper atoms exhibit pseudo-tetrahedral configuration. The cyanide ligands create the bifurcated µ 3 -CN bridges. The [(Cu) 2 µ 3 –(CN) 2 ] motifs causes expansion of the structure of 1 to three dimensions while extensive H-bonds play an essential role in packing structure. SCP 1 was used as an efficient heterogeneous catalyst for oxidative mineralization of acid blue-92 (AB-92), textile dye, with H 2 O 2 . The study aimed to investigate the efficiency of recycled the catalyst 1 and the mechanism of degradation of AB-92. The morphological feature of the SCP 1 as a catalyst before and after catalysis was examined by high resolution transmission electron microscope (TEM).