New Type of Porous Metal-Organic Framework Material Formed by Rigid Ligand

Abstract

A new metal-organic framework, [Pb(H₂ANBA)₂] _n (1) (H₃ANBA = 2-amino-4-nitrobenzoic acid), has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction analysis. Compound 1 features chain structure directed by unprotonated NH₂ and deprotonated COOH linkages, which is then stacked by π– π interaction and weak unclassical hydrogen-bonded interactions to result in 3D porous supramoelcular architecture.

Keywords:

• crystal structure
• porous MOF
• rigid ligand
• supramolecular interaction

The authors are grateful to the JingGangShan University for financial support.

Notes

^a R₁ = ∑‖F₀| −| F _c ‖/∑ | F₀|; _W R₂ = {∑[ _W (F₀ ²- F _c ²)²]/ ∑ (F₀ ²)²}^1/2.