Three Cu(II) coordination polymers with novel bi-triazole ligand: Synthesis, structure and EPR properties

• Published in: Inorganic chemistry communications 2015-01, Vol.51, p.95-98
• Main Authors: Cheng, Rui-Rui, Wu, Zhi-Lei, Hou, Yin-Ling, Dong, Jie, Cui, Jian-Zhong, Zhao, Bin
• Format: Article
• Language: English
• Subjects: Bi-triazole ligand; Cu(II) coordination polymers; EPR properties
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2014.11.017

Three Cu(II) coordination polymers: [Cu(XL)(NO3)2]n (1), {[Cu(XL)(4,4′-bpy)(NO3)2]·CH3CN}n (1a) and {[Cu(XL)3](NO3)2·3.5H2O}n (2) have been synthesized mainly based on a novel bi-triazole ligand N,N′-bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxdiimide bi(1,2,4-triazole) (XL) and characterized by X-ray crystallography, EPR spectra, elemental analyses, FT-IR spectra and PXRD patterns. Structure analyses reveal that compounds 1 and 1a exhibit 1D chains, and compound 2 features a 2D cationic framework. Additionally, the Cu(II) ions with various coordination environment in compounds 1, 1a and 2 exhibit different EPR properties. Three Cu(II) coordination polymers have been synthesized mainly based on a novel bi-triazole ligand. In these compounds, the Cu(II) ions with various coordination environments exhibit different EPR properties. [Display omitted] •A novel bi-triazole ligand was prepared and characterized.•Three copper-based coordination polymers were structurally characterized.•These compounds exhibit different EPR signals.