Synthesis, structure and properties of a new NH-1,2,3-triazole-based octanuclear copper(II) complex

An octanuclear copper complex, [Cu8(L)10(OH)4Cl2·(DMF)2]·2DMF ( HL= 4-(2-bromophenyl)-2H-1,2,3-triazole) has been synthesized. Single crystal diffraction reveals that it crystallizes in the triclinic space group P − 1. The complex shows fluorescent quenching compared with the free ligand. The {Cu8} displays overall strong antiferromagnetic (AF) coupling via hydroxyl groups, κ2-N,N-trizaoles and κ3-N,N,N-trizaoles, and the complex exhibits AF ordering under low temperature with TN = 8.5 K.