First example of a covalently bound dimeric inverted porphyrin

Area of Science:

• Organic Chemistry
• Coordination Chemistry
• Materials Science

Background:

• Inverted porphyrins are macrocyclic compounds with unique structural and electronic properties.
• Nickel(II) complexes of porphyrins are widely studied for their catalytic and photophysical applications.
• Controlled synthesis of dimeric porphyrin structures is crucial for developing advanced functional materials.

Purpose of the Study:

• To investigate the reaction of 5,10,15,20-tetraphenyl-2-aza-21-carbaporphyrinatonickel(II) with dihalomethanes.
• To synthesize and characterize Ni(II) inverted porphyrin dimers.
• To optimize reaction conditions for dimer formation.

Main Methods:

• Synthesis of 5,10,15,20-tetraphenyl-2-aza-21-carbaporphyrinatonickel(II).
• Reaction with dihalomethanes in the presence of a proton scavenger.
• Purification and characterization of the resulting dimeric products using spectroscopic techniques.

Main Results:

• Efficient synthesis of a 2,21'-CH2-linked dimer of Ni(II) inverted porphyrins, achieving yields up to 90%.
• Formation of a minor 2,2'-linked isomer.
• Characterization confirmed the structures of the synthesized dimers.

Conclusions:

• The reaction provides a high-yield pathway to Ni(II) inverted porphyrin dimers.
• The synthetic method allows for the selective formation of specific linkage isomers.
• These dimeric structures hold potential for applications in catalysis and molecular electronics.