CO₂-Responsive Nano-Objects with Assembly-Related Aggregation-Induced Emission and Tunable Morphologies.

Area of Science:

• Polymer Chemistry
• Materials Science
• Nanotechnology

Background:

• Polymerization-induced self-assembly (PISA) is a powerful technique for creating complex polymer architectures.
• Stimuli-responsive nanomaterials are crucial for advanced applications, but controlling their morphology remains challenging.

Purpose of the Study:

• To synthesize CO2-responsive polymeric nano-objects with aggregation-induced emission (AIE) properties.
• To investigate the morphology evolution of these nano-objects under varying CO2 conditions.
• To utilize AIE as a real-time monitoring tool for morphological changes.

Main Methods:

• Utilized PISA of 2-(dimethylamino)ethyl methacrylate (DMAEMA), 2-(4-formylphenoxy)ethyl methacrylate (MAEBA), and 4-(1,2,2-triphenylvinyl)phenyl methacrylate (TPEMA).
• Investigated morphology changes (spheres to vesicles) based on MAEBA feed.
• Observed CO2-induced transformations from spheres to jellyfish/vesicles and vesicles to complex vesicles due to DMAEMA units.
• Incorporated TPEMA for AIE to enable real-time monitoring.

Main Results:

• Successfully synthesized CO2-responsive nano-objects with tunable morphologies.
• Demonstrated CO2-triggered shape transformations from spheres to jellyfish and vesicles.
• Confirmed the role of TPEMA in providing AIE for real-time visualization of morphology changes.
• Established a correlation between MAEBA feed and initial nano-object morphology.

Conclusions:

• The developed PISA strategy enables the creation of sophisticated, stimuli-responsive polymeric nanomaterials.
• The CO2-responsiveness and AIE features offer a novel platform for monitoring and controlling nano-object assembly.
• This work advances the design of tunable polymeric nanomaterials for diverse applications.