Coordination polymers based on aluminum(III) porphyrins

Area of Science:

• Coordination Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Aluminum(III) porphyrin carboxylate complexes exhibit a known affinity for coordinating with nitrogenous ligands.
• The design of ligands offering multiple donor sites is crucial for constructing complex supramolecular architectures.

Purpose of the Study:

• To investigate the formation of coordination polymers using aluminum(III) porphyrin carboxylates and bifunctional ligands.
• To explore the structural characteristics of the resulting one-dimensional (1-D) coordination polymers.

Main Methods:

• Synthesis of aluminum(III) porphyrin carboxylate complexes.
• Utilized isonicotinic acid and nicotinic acid as bifunctional ligands (carboxylate and nitrogen donors).
• Characterization techniques included proton nuclear magnetic resonance ((1)H NMR) spectroscopy, nanoelectrospray ionization spectrometry, and X-ray diffraction analysis.

Main Results:

• The reaction successfully yielded one-dimensional (1-D) coordination polymers.
• Complexes and their linear oligomers were spectroscopically identified.
• Solid-state X-ray diffraction confirmed the polymeric, one-dimensional structure.

Conclusions:

• Bifunctional ligands like isonicotinic and nicotinic acid are effective in directing the self-assembly of aluminum(III) porphyrin carboxylates into 1-D coordination polymers.
• The study demonstrates a viable synthetic route for creating novel coordination polymer architectures with potential applications in materials science.