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

Abstract

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. In 1 and 2, BImPyO generated a 1-D chain by adopting μ₂-kN : kN′ coordination to bridge two Cu(II) ions with bis-N-chelation. In 3, by adopting μ₃-kN : kN′:kO coordination, BImPyO bridged three crystallographically independent Zn(II) ions to form a 3-D framework; 3 exhibits strong fluorescent emission in the solid state at room temperature.

Graphical abstract

Keywords:

• Coordination polymers
• Crystal structure
• 4-(1H-l,3-benzimidazol-2- yl)pyridine 1-oxide
• Hydrothermal condition
• Luminescent property

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China [grant number 21201087], NSF of Jiangsu Province [grant number BK20131244], Six talent peaks project in Jiangsu Province [grant number 2014-XCL-008], the Qing Lan Project of Jiangsu Province and the Innovation Program of Graduate Students in Jiangsu Province [grant number SJZZ_0142], a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institution.