AIE-active organoboron complexes with highly efficient solid-state luminescence and their application as gas...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Organoboron compounds are explored for their unique photophysical properties.
• Aggregation-Induced Emission (AIE) is a desirable characteristic for luminophores.
• Development of novel sensors for acidic gases is crucial.

Purpose of the Study:

• To synthesize novel BF2-/BPh2-chelated organoboron complexes.
• To investigate their Aggregation-Induced Emission (AIE) characteristics.
• To evaluate their potential as solid-state luminescent sensors for acidic gases.

Main Methods:

• Synthesis of benzothiazole-enolate-based bidentate ligands and their complexation with boron.
• Characterization of photophysical properties including AIE and Stokes shift.
• X-ray crystal analysis and theoretical calculations for property rationalization.
• Testing sensing capabilities for acidic gases.

Main Results:

• Successfully synthesized novel BF2-/BPh2-chelated organoboron complexes.
• Exhibited strong aggregation-induced emission (AIE) and large Stokes shift in solution.
• Demonstrated intense solid-state emission with high quantum yields (0.14-0.43).
• Compounds showed reversible emission changes upon exposure to acidic gas, indicating sensing potential.

Conclusions:

• The novel organoboron complexes are effective AIE luminophores.
• Their photophysical properties are well-explained by structural and theoretical analyses.
• These compounds show promise as solid-state luminescent sensors for acidic vapors.