Biodegradable film enabling visible light excitation of Hexanuclear Europium(III) complex for various applications

Developing novel multinuclear organic visible-light-excited europium complex is highly challenging. Herein, novel visible light excitation hexanuclear Eu3+ complex (Eu-6(TTA)(18)CTP-TPY) and Eu3+ complex/polylactic acid (PLA) luminescent films have been successfully designed and prepared. Through proper molecular engineering, the hexanuclear Eu3+ complex, Eu3+ complex/PLA luminescent films both can be successfully excited by visible light. Similarly, it was interesting that the LEDs assembled with Eu-6(TTA)(18)CTP-TPY/PLA can also achieve excellent photoluminescence under 400 nm excitation wavelength, the luminous efficiency can reach as high as 333.33 lm/W, and the 10%-Eu3+ complex/PLA LED kept superior photothermal stability within 50 degrees C. What's most surprising was that the Eu-6(TTA)(18)CTP-TPY/PLA luminescent films showed prompt and effective recognition for glacial acetic acid and acrylic acid. This work presents a promising strategy to explore molecular engineering platforms for effectively fluorescence sensing and red LED device applications.

Automated summary

Novel visible-light-excited hexanuclear Eu3+ complex and Eu3+ complex/PLA luminescent films have been successfully designed and prepared through proper molecular engineering, showing excellent photoluminescence and promising applications in fluorescence sensing and LED devices.