Coordination polymer {[Cd-2(NiL)(2)(Btca)(2)] center dot H2O}n of macrocyclic oxamide with benzotriazole-5-carboxylate: Syntheses, crystal structures, and fluorescence properties

摘要

A novel heterometallic coordination polymer {[Cd-2(NiL)(2)(Btca)(4)] center dot H2O} (n) (I) (H2L = 2,3-dioxo5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien, H(2)Btca = benzotriazole-5-carboxylic acid) was synthesized and structurally characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction (CIF file CCDC no. 1043065). Complex I exhibits a two-dimensional network structure formed by Cd2Ni2 units via the oxamide and benzotriazole-5-carboxylate bridges. It crystallizes in the monoclinic system, space group P2(1)/c. The lattice parameters are: a = 1.24488(8), b = 2.75370(19), c = 1.49336(10) , beta = 103.1070(10)A degrees and V = 4.9859(6) (3), Z = 4. The fluorescence properties of compound I are also discussed.