A novel (2,3,5)-connected double interpenetrating three-dimensional network cadmium coordination polymer with flexible tri(triazole) and dicyanamide ligands

The self-assembly reaction of the flexible ligand 1,3,5-tri(1,2,4-triazol-1-ylmethyl)-2,4,6-trimethylbenzene (ttmb), Cd(II) and dca (dicyanamide) gives a novel coordination polymer {[Cd(ttmb)(dca)2]radical dotH2O}n (1). There are two kinds of dca ligands (the bis-monodentate bridging dca and the monodentate dca). Each bridge ligand ttmb links three Cd(II) atoms to form a two-dimensional (6, 3) network [Cd(ttmb)]n. The bridge dca ligands further connect the two-dimensional networks to construct a novel (2,3,5)-connected three-dimensional network. Two identical three-dimensional networks interpenetrate each other giving rise to a double interpenetrating network. 1 exhibits blue luminescent emission maxima at 383 nm in the solid state at room temperature.