Self-assembly of 1-D and 3-D transition-metal coordination polymers based on 4-(1H-l,3-benzimidazol-2-yl)pyridine 1-oxide.

Three metal-organic coordination polymers based on 4-(1H-l,3-benzimidazol-2-yl)pyridine 1-oxide (BImPyO) with the molecular structures [Cu2(C12H8N3O)2]n(1), [Cu(C12H8N3O)]n(2), and [Zn(C12H8N3O)Cl]n(3) were synthesized under hydrothermal conditions. They showed diverse coordination modes and were further characterized by elemental analysis, infrared spectroscopy, and single crystal X-ray structure analysis, respectively. In1and2, BImPyO generated a 1-D chain by adopting?2-kN?:?kN? coordination to bridge two Cu(II) ions with bis-N-chelation. In3, by adopting?3-kN?:?kN?:kO coordination, BImPyO bridged three crystallographically independent Zn(II) ions to form a 3-D framework;3exhibits strong fluorescent emission in the solid state at room temperature. [ABSTRACT FROM AUTHOR]