Switchable room-temperature phosphorescence in photochromic coordination polymers based on electron transfer

Area of Science:

• Materials Chemistry
• Supramolecular Chemistry
• Photochemistry

Background:

• Coordination polymers (CPs) are advanced materials with tunable properties.
• Photochromism and room-temperature phosphorescence (RTP) are desirable optical functionalities.
• Dynamic control over luminescence is crucial for advanced applications.

Purpose of the Study:

• To synthesize novel cadmium(II)-based coordination polymers.
• To investigate their photochromic and phosphorescent properties.
• To explore their potential in information encryption and anti-counterfeiting.

Main Methods:

• Solvothermal synthesis of cadmium(II)-based coordination polymers.
• Photochromism studies under UV-Vis irradiation.
• Time-resolved spectroscopy to characterize room-temperature phosphorescence.
• Analysis of the interplay between photochromism and RTP.

Main Results:

• Successful synthesis of two new Cd(II)-based CPs.
• Demonstration of electron transfer-induced photochromism in the CPs.
• Observation of long-lived room-temperature phosphorescence.
• Dynamic switching of RTP correlated with the reversible photochromic process.

Conclusions:

• The synthesized CPs exhibit dual photoresponsive properties.
• The dynamic control over RTP via photochromism is achieved.
• These materials show significant promise for multi-level information encryption and dynamic anti-counterfeiting strategies.