21-Carba-23-selenaporphyrinoid Dyads-An Azepine Unit as a Merging Motif

Area of Science:

• Organic Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Porphyrinoids are macrocyclic compounds with diverse applications.
• Carbaporphyrinoids, where carbon atoms replace nitrogen in the porphyrin ring, offer modified electronic and structural properties.
• Selenaporphyrinoids incorporate selenium, further tuning their characteristics.

Purpose of the Study:

• To investigate the oxidative dimerization of 10,15-diaryl-21-carba-23-selenaporphyrinoids.
• To elucidate the reaction pathway and structural outcome of this dimerization.
• To characterize the resulting supramolecular architecture.

Main Methods:

• Oxidation of 10,15-diaryl-21-carba-23-selenaporphyrinoids.
• Structural analysis of the resulting dyads using spectroscopic and crystallographic techniques (implied).
• Mechanistic investigation of the dimerization process.

Main Results:

• Successful synthesis of dyads through oxidative dimerization.
• Identification of a [5+2] cycloaddition pathway leading to an azepine unit formation.
• Observation of a unique canted arrangement of two carbaporphyrinoid planes, resembling an open seashell.

Conclusions:

• The oxidation of diaryl-carbaselenaporphyrinoids provides a route to novel supramolecular dyads.
• The [5+2] cycloaddition mechanism yields a unique structural motif with potential applications in molecular recognition or materials science.
• The seashell-like arrangement highlights the versatility of carbaselenaporphyrinoid chemistry.