Polylysine crosslinked AIE dye based fluorescent organic nanoparticles for biological imaging applications

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Aggregation-induced emission (AIE) dyes offer unique optical properties.
• Developing stable and biocompatible fluorescent nanoparticles is crucial for biomedical imaging and diagnostics.

Purpose of the Study:

• To fabricate and characterize novel fluorescent organic nanoparticles (FONPs) using AIE dyes.
• To evaluate the potential of these FONPs for biomedical applications through biocompatibility and cell uptake studies.

Main Methods:

• Fabrication of FONPs via ring-opening reaction with polylysine linker.
• Characterization using UV-vis absorption, fluorescence spectroscopy, FTIR, and TEM.
• Assessment of biocompatibility and cellular uptake in vitro.

Main Results:

• Successful synthesis of crosslinked FONPs at room temperature without catalysts.
• FONPs exhibit uniform morphology, strong red fluorescence, and high water dispersibility.
• Demonstrated excellent biocompatibility and significant cell uptake, indicating promising in vivo potential.

Conclusions:

• The developed AIE dye-based FONPs are robust, water-dispersible, and highly fluorescent.
• These FONPs show great promise as advanced fluorescent probes for diverse biomedical applications.