The first electroresponsive phenylazomethine macrocycles: highly preferential formation and regular molecular packing

Area of Science:

• Polymer Chemistry
• Materials Science
• Organic Synthesis

Background:

• Polyphenylazomethines are a class of polymers with potential applications in electronics.
• Controlling macrocycle formation in polycondensation reactions remains a challenge.
• Understanding the relationship between molecular structure and material properties is crucial.

Purpose of the Study:

• To achieve highly preferential formation of novel polyphenylazomethine macrocycles.
• To investigate the structural characteristics and properties of these newly synthesized macrocycles.
• To explore the influence of reaction conditions on macrocycle formation.

Main Methods:

• Polycondensation reactions of polyphenylazomethines.
• Controlled addition of TiCl(4) and/or monomer during synthesis.
• Structural characterization using spectroscopic and crystallographic techniques.
• Electrochemical analysis to determine redox properties.

Main Results:

• Successfully synthesized novel polyphenylazomethine macrocycles with high selectivity.
• Identified unique structures influenced by (E)/(Z)-conformation of azomethine bonds.
• Observed extremely regular molecular-packing states in the synthesized macrocycles.
• Demonstrated reversible redox properties upon protic acid doping.

Conclusions:

• The addition of TiCl(4) and/or monomer during polycondensation is highly effective for preferential macrocycle formation.
• The synthesized polyphenylazomethine macrocycles possess unique structural features and tunable redox properties.
• These findings open avenues for developing advanced functional materials based on polyphenylazomethine macrocycles.