N-Vinylthio Phthalimides (N-VTPs): Modular Reagents for Vinylthio AIEgen Transfer

Area of Science:

• Organic Chemistry
• Materials Science
• Photochemistry

Background:

• Aggregation-induced emission (AIE) is a phenomenon where molecules become more emissive in aggregate or solid states.
• Developing novel luminogens with tunable properties is crucial for advanced optical applications.
• Sulfur-containing organic molecules offer unique electronic and structural characteristics.

Purpose of the Study:

• To introduce N-vinylthio phthalimides (N-VTPs) as versatile reagents for vinylthiolation.
• To synthesize and characterize novel aggregation-induced emission-active tetraaryldivinyl sulfides (TADVSs) and diarylvinyl sulfides (DAVSs).
• To explore the photophysical properties and AIE mechanism of the newly synthesized compounds.

Main Methods:

• Synthesis of N-vinylthio phthalimides (N-VTPs).
• Vinylthiolation reactions to construct TADVSs and DAVSs.
• Spectroscopic analysis (UV-Vis, fluorescence) to determine photophysical properties.
• Computational modeling and experimental studies to understand the AIE mechanism.

Main Results:

• N-VTPs were successfully employed as modular reagents for efficient vinylthiolation.
• Novel TADVSs and DAVSs exhibiting AIE properties were synthesized.
• Tetraaryldivinyl sulfides (TADVSs) with sulfur insertion into ethene stators were reported as AIE luminogens (AIEgens) for the first time.
• Detailed photophysical properties and aggregated conformations were elucidated, confirming the AIE effect.
• A water-soluble TADVS derivative was synthesized for potential cell imaging applications.

Conclusions:

• N-vinylthio phthalimides (N-VTPs) represent a valuable new class of reagents for constructing AIE-active sulfur-containing molecules.
• The synthesized TADVSs and DAVSs demonstrate significant potential as AIE luminogens.
• The findings open new avenues for designing advanced functional materials with tailored photophysical properties for applications in sensing and bioimaging.