Supramolecular Sequential Light-Harvesting Systems for Constructing White LED Device and Latent Fingerprint Imaging

Area of Science:

• Supramolecular chemistry
• Materials science
• Nanotechnology

Background:

• Efficient light energy utilization is crucial for advanced technologies.
• Supramolecular systems offer tunable properties for light-harvesting applications.
• Developing sequential energy transfer mechanisms is key for optimizing light harvesting.

Purpose of the Study:

• To create a supramolecular light-harvesting system (LHS) with sequential energy transfer using pillararene host-guest interactions.
• To investigate the self-assembly and aggregation-induced emission (AIE) properties of the system in water.
• To explore the applications of the developed LHS in white light-emitting diode (LED) devices and latent fingerprint imaging.

Main Methods:

• Non-covalent self-assembly of pillar[5]arene-based host-guest complexes (WP5·G) in aqueous media.
• Formation of nanoparticles exhibiting aggregation-induced emission (AIE).
• Construction of sequential LHS by incorporating fluorescent dyes (DBT and SR101) with the nanoparticles.

Main Results:

• Self-assembly of WP5·G complexes into nanoparticles with enhanced AIE.
• Successful construction of a sequential LHS capable of efficient energy transfer.
• Achieved white-light emission from the LHS at a specific molar ratio (WP5·G/DBT/SR101 = 1100/2/16).
• Demonstrated multicolor fluorescence, including red emission, for high-resolution latent fingerprint imaging.

Conclusions:

• A general strategy for constructing sequential LHS in water via macrocyclic host-guest interactions was established.
• The developed supramolecular LHS shows significant potential for multi-functional applications, including white-light LED devices and forensic imaging.
• This work promotes the advancement and application of supramolecular light-harvesting systems.