A Nanoconfinement Strategy for Regulating Cluster Size to Enable Color Tuning in Clustering-Triggered Phosphorescence

Area of Science:

• Materials Science
• Photochemistry
• Nanotechnology

Background:

• Clustering-triggered emission systems often exhibit uncontrolled phosphorescence colors due to variable molecular cluster sizes.
• Designing materials with specific phosphorescence emission properties remains a significant challenge.

Purpose of the Study:

• To achieve rational tuning of ultralong room-temperature phosphorescence (URTP) color in a hybrid material system.
• To investigate the effect of nanoscale confinement on the phosphorescence properties of a URTP material.

Main Methods:

• Hybridization of polystyrene sulfonic acid (PSS), a known URTP material, with a silica network.
• Varying the mixing ratios of PSS and silica to control material composition and structure.
• Characterization of phosphorescence color and domain size under different confinement conditions.

Main Results:

• Successful rational tuning of URTP color was achieved by controlling the hybridization ratio.
• Nanoscale confinement within the silica network was found to reduce the domain size of PSS.
• A direct correlation was observed between reduced PSS domain size and altered phosphorescence color.

Conclusions:

• Hybridizing PSS with a silica network provides a viable strategy for tuning URTP color.
• Nanoscale confinement is a key factor in controlling the phosphorescence characteristics of URTP materials.
• This approach offers a pathway for designing materials with desired phosphorescence colors for various applications.