Finely manipulating room temperature phosphorescence by dynamic lanthanide coordination toward multi-level...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Room temperature phosphorescence (RTP) materials are highly sought after for their unique optical characteristics and potential applications.
• Precisely controlling RTP properties on demand remains a significant challenge in the field.
• Existing methods often lack the fine-tuning capabilities required for advanced applications.

Purpose of the Study:

• To develop a novel strategy for precisely manipulating organic phosphorescent performance.
• To investigate the role of dynamic lanthanide coordination in controlling RTP.
• To demonstrate the utility of these tunable materials in high-security applications.

Main Methods:

• Covalent embedding of terpyridine phenylboronic acid organic phosphors into a polyvinyl alcohol matrix.
• Introduction of dynamic lanthanide coordination to modulate phosphorescent properties.
• Characterization of phosphorescence intensity and lifetime under varying lanthanide doping.

Main Results:

• Achieved ultralong organic room temperature phosphorescence with lifetimes up to 0.629 seconds.
• Demonstrated fine control over phosphorescence intensity and lifetime by adjusting lanthanide dopants.
• Successfully implemented multi-level information encryption, including attacker-misleading and spatial-time-resolved techniques.

Conclusions:

• Dynamic lanthanide coordination offers a feasible strategy for finely manipulating organic phosphorescent performance.
• The developed materials exhibit excellent tunable properties suitable for advanced optical applications.
• This approach significantly enhances security for information encryption and opens new avenues in optical material design.