Solid-State Emissive Aroyl-S,N-Ketene Acetals with Tunable Aggregation-Induced Emission Characteristics

Area of Science:

• Organic Chemistry
• Materials Science
• Photophysics

Background:

• Development of novel organic molecules with unique photophysical properties is crucial for advanced materials.
• Aggregation-induced emission (AIE) is a desirable characteristic for solid-state applications, but its control remains a challenge.

Purpose of the Study:

• To synthesize a new class of N-Benzyl aroyl-S,N-ketene acetals.
• To investigate their solid-state emission and aggregation-induced emission (AIE) properties.
• To explore the effect of electronic substituents on the emission color.

Main Methods:

• Condensation reaction between aroyl chlorides and N-benzyl 2-methyl benzothiazolium salts.
• Synthesis of a library of 35 diverse chromophores.
• Spectroscopic analysis to characterize photophysical properties, including solid-state emission and AIE.

Main Results:

• Successful synthesis of N-Benzyl aroyl-S,N-ketene acetals in good to excellent yields.
• The synthesized chromophores exhibit bright solid-state emission and AIE characteristics.
• Tuning of emission color from deep blue to red was achieved by varying substituents from electron-donating to electron-withdrawing.

Conclusions:

• N-Benzyl aroyl-S,N-ketene acetals represent a promising class of compounds for solid-state emitters.
• The facile synthesis and tunable emission properties make them attractive for optoelectronic applications.
• The study demonstrates a clear structure-property relationship for controlling emission color in these AIE-active molecules.