Poly[(μ(2)-4,4'-bipyridine-κN:N')bis-(μ(4)-cyclo-hexane-1,3-dicarboxyl-ato-κO:O':O'':O''')dizinc(II)].

Area of Science:

• Materials Science
• Inorganic Chemistry
• Crystallography

Background:

• Coordination polymers offer tunable structures for diverse applications.
• Designing novel network architectures is crucial for materials development.
• Metal-organic frameworks (MOFs) are a key class of coordination polymers.

Purpose of the Study:

• To synthesize and characterize a novel 3D coordination polymer.
• To investigate the structural features and coordination geometry within the network.
• To explore the role of organic linkers in dictating network topology.

Main Methods:

• Single-crystal X-ray diffraction to determine the crystal structure.
• Infrared spectroscopy for functional group analysis.
• Powder X-ray diffraction for phase purity confirmation.

Main Results:

• A 3D coordination polymer, [Zn(2)(C(8)H(10)O(4))(2)(C(10)H(8)N(2))](n), was successfully synthesized.
• The cyclo-hexane-1,3-dicarboxylate ligand adopted a chair conformation with axial and equatorial carboxylate groups.
• A layered motif was formed by bridging carboxylate groups to Zn(II) atoms, with layers connected by 4,4'-bipyridine to form a 3D network.
• The Zn(II) centers exhibited a square-pyramidal geometry, with the 4,4'-bipyridine nitrogen occupying the apical position.
• The 4,4'-bipyridine linker was found to be disordered around a center of inversion.

Conclusions:

• The study presents a novel 3D coordination polymer with a unique layered-3D network structure.
• The specific conformation and coordination mode of the cyclo-hexane-1,3-dicarboxylate ligand are critical for the observed network topology.
• The square-pyramidal coordination environment around Zn(II) highlights the versatility of metal-ligand interactions in coordination chemistry.