Visible-Light-Activated Multi-Color Room Temperature Phosphorescence Under Extreme Aqueous Environment and High...

Area of Science:

• Materials Science
• Organic Chemistry
• Supramolecular Chemistry

Background:

• Organic room-temperature phosphorescence (RTP) materials are promising but often unstable in extreme environments (aqueous, high temperature) and require UV excitation.
• This instability and excitation limitation hinder their practical applications.

Purpose of the Study:

• To develop a supramolecular assembly strategy for creating organic phosphorescent materials activated by visible light.
• To enhance the stability and performance of these materials under extreme conditions.

Main Methods:

• A supramolecular assembly strategy was employed using aromatic acid (AC) and ammelide (AMD) linked by hydrogen bonds and covalent interactions.
• The resulting AC@AMD structure was characterized for its phosphorescence properties and stability in various extreme environments.

Main Results:

• The AC@AMD supramolecular assembly demonstrated efficient visible light-activated organic phosphorescence with a quantum yield (ΦP) up to 34.31% and a lifetime (τP) of 1094.99 ms.
• The material exhibited excellent stability and phosphorescence in diverse aqueous solutions (acidic, alkaline, oxidizing, reducing) and at high temperatures.
• The rigid microenvironment and hydrogen-bonding networks within AC@AMD were crucial for enhancing phosphorescence and stability.

Conclusions:

• The developed supramolecular assembly strategy successfully created robust organic phosphorescent materials activated by visible light.
• These materials show great potential for applications in information encryption, anti-counterfeiting, and bioimaging due to their stability and unique optical properties.