Self-assembly of three supramolecular architectures based on an unsymmetrical N-heterocyclic ligand

Three new compounds, {[Cd(Htmb)(Cl)(CH3CO2)] · CH3OH} n (1), [Cd(Htmb)2(Cl)2(H2O)2] · 4H2O (2), and [Cd(Htmb)2(I)2] (3) (Htmb = 2-(1H-triazol-1-ylmethyl)-1H-benzoimidazole), have been synthesized and characterized by elemental analysis, IR, and X-ray diffraction. Compound 1 features 1-D infinite double chains with space group and further forms a 3-D supramolecular structure by hydrogen bonds and π–π interactions. Compound 2 displays a mononuclear structure with space group P2/c, wherein an interesting water chain is formed. Compound 3 shows a mononuclear structure with space group P21/n and extends into a 3-D supramolecular structure through hydrogen bonds and π–π interactions. In addition, the spectral properties are investigated, with strong luminescence observed for 1 and 2.