Syntheses, structures, and luminescent properties of two Pb(II) coordination polymers based on 2,2′-(diazene-1,2-diyl)dibenzoate acid and different N-donor ligands

Abstract

Two new Pb(II) coordination polymers, [PbL(bpy)]_n (1) and {[PbL(bpp)]·2H₂O}_n (2) [L = 2,2′-(diazene-1,2-diyl)dibenzoate acid, bpy = 4,4′-bipyridine, bpp = 1,3-bis(4-pyridyl)propane], have been hydrothermally synthesized and characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. Compound 1 shows a 3-D 3-fold interpenetrating framework structure with a 6⁶ topology. Compound 2 displays a 2-D lattice layer structure. The structural differences between 1 and 2 indicate that N-donor ancillary ligands play a key role on the final architectures. Thermal stabilities and luminescent properties of 1 and 2 in solid state were also investigated.

Graphical abstract

Keywords:

• Pb(II) coordination polymers
• Hydrothermal reactions
• Crystal structures
• Luminescence

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 21301010], [grant number 21304001], [grant number U1204213]; the Natural Science Project of the Education Department of Henan Province [grant number 13A150012]; the Sci-tech Development Project of the Science and Technology Department of Henan Province [grant number 132102210422]; the Undergraduate Innovation Foundation of Anyang Normal University [grant number ASCX/2014-Z37].