A luminescent Cu(I)–CN-1,2,4-triazolate open-framework with unique 2-fold interpenetrated (4, 6)-connected fsc topology

Self-assembly of CuCN, K3Fe(CN)6 and 3,5-bis(4-pyridyl)-1,2,4-triazole (BPy-4Trz) ligand under hydrothermal conditions generated a novel hybrid crystalline compound, namely, {Cu2(BPy-4Trz)(CN)}n (1). Two kinds of binuclear motifs, [Cu2(Trz)2] and [Cu2CN], link each other through the 4-pyridyl and cyanide groups to give a three-dimensional (4,6)-connected open-framework of 1 with 2-fold interpenetrated fsc topology. The green fluorescence emissions are observed in the solid state at room temperature.