Tetraphenylethylene-based giant emissive hexagonal metallaprisms for biomolecule sensing

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Giant emissive metallacages are synthetically challenging yet crucial for advanced applications.
• Tetraphenylethylene (TPE)-based materials offer unique emissive properties.

Purpose of the Study:

• To synthesize and characterize large, emissive TPE-based hexagonal metallaprism metallacages.
• To investigate the interaction of these metallacages with polymers, small molecules, and DNA.
• To explore their potential for selective biosensing applications.

Main Methods:

• Synthesis of TPE-based hexagonal metallaprism.
• Characterization of metallacage size (up to 3.7 nm) and emissive properties.
• Investigation of interactions with polymers, small molecules, and nucleotides (ATP, ADP) via electrostatic interactions and fluorescence spectroscopy.

Main Results:

• Successfully synthesized one of the largest TPE-based metallacages (3.7 nm diameter).
• Demonstrated selective interactions with polymers and small molecules through electrostatic forces.
• Observed enhanced emission upon DNA complexation due to inhibited molecular motion.
• Reported decreased emission for ATP and ADP due to photoinduced electron transfer.

Conclusions:

• Developed giant emissive metallaprism metallacages with potential for selective biosensing.
• The findings guide the future design of metallacages for bio-applications.
• Demonstrated the utility of TPE-based metallacages in distinguishing between different biomolecules.