Aggregation-induced emission and efficient solid-state fluorescence from tetraphenylethene-based N,C-chelate...

Area of Science:

• Materials Science
• Organic Chemistry
• Supramolecular Chemistry

Background:

• Organoboron compounds are versatile building blocks in organic synthesis and materials science.
• Intramolecular coordination can significantly influence the photophysical properties of organic molecules.
• Aggregation-induced emission (AIE) is a desirable characteristic for solid-state emitters.

Purpose of the Study:

• To synthesize novel thermally stable four-coordinate organoborons.
• To investigate the effect of intramolecular B⋅⋅⋅N coordination on AIE properties.
• To achieve high fluorescence quantum yields in solid films.

Main Methods:

• Grafting intramolecular B⋅⋅⋅N coordination into tetraphenylethene-pyridine and -quinoline adducts.
• Characterization of the synthesized organoboron compounds.
• Measurement of photophysical properties, including fluorescence quantum yields and AIE behavior.

Main Results:

• Successful synthesis of thermally stable N,C-chelate four-coordinate organoborons.
• Demonstration of aggregation-induced emission (AIE) characteristics in these novel compounds.
• Observation of high fluorescence quantum yields, approaching unity, in solid films.

Conclusions:

• Intramolecular B⋅⋅⋅N coordination is an effective strategy to stabilize four-coordinate organoborons.
• The developed organoborons exhibit promising AIE properties and high solid-state emission efficiency.
• These findings open avenues for the development of advanced organic materials for optoelectronic applications.