Three novel Cd(II) coordination polymers: Synthesis, crystal structures, fluorescence and thermal properties

摘要

Three novel Cd(II) coordination polymers, {[Cd(C(4)BIm)(N-3)(OAc)]center dot C2H5OH}(n) (1), [Cd(C(4)BIm)(H2O)(3)(SO4)](n) (2) (C(4)BIm = 1,4-bis(benzimidazolyl)butane) and [Cd(bbbm)(1.5)(NO3)(2)](n) (3) (bbbm = 1,1'-(1,4-butanediy)bis-1H-benzimidazole) have been prepared and characterized spectroscopically and crystallographically. In polymer 1, C(4)BIm-Cd chains and N-3-Cd chains criss-cross to a layer structure. Polymer 2 possesses a concave-convex chain structure. Polymer 3 exhibits a two-dimensional (2-D) rhomboid grid network, the dimensions of the grid is 25.807 x 13.771 angstrom, and the diagonal-to-diagonal distances are 28.608 x 21.145 angstrom. The fluorescence properties and the thermal stabilities of the three polymers were investigated.