A novel asymmetric chair-like hydroxyl-bridged tetra-copper compound: Synthesis, supramolecular structure and magnetic property

• Published in: Journal of molecular structure 2017-06, Vol.1138, p.155-160
• Main Authors: Wang, Xiao-Feng, Du, Ke-Jie, Wang, Hong-Qing, Zhang, Xue-Li, Nie, Chang-Ming
• Format: Article
• Language: English
• Subjects: Asymmetric tetranuclear cluster; Copper; Magnetic property; Thermal stability; X-ray diffraction
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2017.03.007

A new polynuclear Cu(II) compound, [Cu4(bpy)4(OH)4(H2O)(BTC)]NO3·8H2O (1), was prepared by self-assembly from the solution of copper(II) nitrate and two kinds of ligands, 2,2′-bipyridine (bpy) and benzene-tricarboxylic acid (H3BTC). Single crystal structure analysis reveals that 1 features a rare asymmetric chair-like hydroxyl-bridged tetra-copper cluster: [Cu4(OH)4] core along with one H2O and one BTC3− occupied each terminal coordinated site. In addition, the magnetic property has been investigated. A copper complex based on the asymmetric chair-like hydroxo-bridged tetra-copper [Cu4(bpy)4(OH)4(H2O)(BTC)] units has been synthesized and characterized. In addition, the magnetic property of the compound was investigated. [Display omitted] •A hydroxyl-bridged tetra-nuclear Cu(II) complex was prepared through self-assembly with bpy and benzene-tricarboxylic acid..•Complex crystal structure features a rare asymmetric chair-like [Cu4(bpy)4(OH)4(H2O)(BTC)]core.•The magnetic property shows the dominant antiferromagnetic exchanges within Cu4(OH)4 cluster.