Crystal structure of catena-poly[[tetra-aquamangan-ese(II)]-μ-1,5-dihy-droxynaphthalene-2,6-di-carboxyl-ato]

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Manganese coordination polymers are of interest for their diverse structures and potential applications.
• Designing novel network structures requires understanding the coordination behavior of metal ions with organic ligands.

Purpose of the Study:

• To synthesize and characterize a novel manganese coordination polymer using 1,5-dihydroxynaphthalene-2,6-dicarboxylic acid.
• To investigate the structural features and intermolecular interactions within the synthesized compound.

Main Methods:

• Solvothermal synthesis involving manganese(II) chloride, 1,5-dihydroxynaphthalene-2,6-dicarboxylic acid (H4dondc), and lithium hydroxide.
• Single-crystal X-ray diffraction analysis to determine the crystal structure and coordination geometry.
• Analysis of hydrogen bonding and π-π stacking interactions.

Main Results:

• The title compound, [Mn(H2dondc)(H2O)4]n, was successfully synthesized.
• The structure features Mn(II) ions in a six-coordinated octahedral geometry, coordinated by carboxylate oxygen atoms and water molecules.
• The 1,5-dihydroxynaphthalene-2,6-dicarboxylate (H2dondc2-) ligands bridge Mn(II) ions to form 1D chains.
• Intra-chain and inter-chain hydrogen bonding, along with π-π stacking interactions, connect these chains into 2D networks.

Conclusions:

• The synthesized manganese coordination polymer exhibits a 2D network structure stabilized by hydrogen bonding and π-π stacking.
• The coordination behavior of the H2dondc2- ligand and the solvent molecules dictates the formation of the extended network architecture.
• This study contributes to the understanding of structure-property relationships in manganese-based coordination materials.