A two-dimensional Zn coordination polymer with a three-dimensional supra-molecular architecture

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Coordination polymers offer tunable properties for advanced applications.
• Designing novel network structures is crucial for materials development.
• Zinc-based coordination polymers are of interest due to zinc's versatile coordination modes.

Purpose of the Study:

• To synthesize and characterize a new 2D zinc coordination polymer.
• To elucidate the structural features and intermolecular interactions.
• To explore the formation of a 3D supramolecular architecture.

Main Methods:

• Synthesis of the title compound: poly[bis-{μ2-4,4'-bis-[(1,2,4-triazol-1-yl)meth-yl]biphenyl-κ2N4:N4'}bis-(nitrato-κO)zinc(II)].
• Characterization using elemental analysis.
• Single-crystal X-ray diffraction to determine the crystal structure.

Main Results:

• The compound features a distorted octahedral {ZnN4O2} coordination geometry around the Zn(II) cation.
• Linear biphenyl ligands link Zn(II) cations, forming 2D layers parallel to the (132) crystallographic plane.
• These layers are interconnected via C-H⋯O, C-H⋯N, C-H⋯π, and π-π stacking interactions, creating a 3D supramolecular network.

Conclusions:

• A novel 2D zinc coordination polymer with a unique {ZnN4O2} geometry has been successfully synthesized and structurally characterized.
• The study reveals the formation of a 3D supramolecular architecture driven by diverse intermolecular forces.
• This work contributes to the understanding of structural diversity in zinc-based coordination polymers.