Stimuli-responsive AIEgens with an ultra acidochromic scope for self-reporting soft actuators

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Chemical Engineering

Background:

• Developing responsive materials for sensing and actuation is crucial for advanced applications.
• Acidochromic materials that change color in response to pH are valuable for monitoring acidity.
• Aggregation-induced emission (AIE) luminogens offer unique photophysical properties for sensing.

Purpose of the Study:

• To engineer novel NBI-based acidochromic AIEgens with an ultra-wide acidochromic scope.
• To establish structure-property relationships for these AIEgens in self-reporting soft actuators.
• To fabricate high-precision acidity monitoring chips and acid-driven actuators.

Main Methods:

• Synthesis and characterization of NBI-based acidochromic AIEgens.
• Investigation of photophysical properties and acidochromic behavior.
• Density Functional Theory (DFT) and 1H NMR analyses to elucidate mechanisms.
• Fabrication of hydrogel-based biomimetic actuators.

Main Results:

• Established a clear relationship between AIEgen structure and photophysical properties.
• Confirmed the protonation order of nitrogen atoms and elucidated acidochromic mechanisms.
• Successfully designed acid-driven actuators capable of self-reporting and controlled cargo release.
• Fabricated high-precision acidity monitoring chips.

Conclusions:

• The developed NBI-based acidochromic AIEgens enable ultra-wide acidochromic scope in soft actuators.
• These actuators can precisely monitor acidity and perform load-bearing tasks in acidic conditions.
• Potential applications include targeted drug delivery in acidic biological environments and specialized transport systems.