Triggering White-Light Emission in a 2D Imine Covalent Organic Framework Through Lanthanide Augmentation
Chidharth Krishnaraj, Anna M Kaczmarek, Himanshu Sekhar Jena
1Institut für Chemie-Funktionsmaterialien , Technische Universität Berlin , Hardenbergstraße 40 , 10623 Berlin , Germany.
ACS Applied Materials & Interfaces
|July 6, 2019
Summary
Researchers created white-light emitting materials using covalent organic frameworks (COFs) by grafting lanthanides. This breakthrough enables tunable luminescence for advanced optoelectronic applications.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Covalent organic frameworks (COFs) are porous materials with tunable optical properties.
- Achieving white-light emission, crucial for solid-state lighting, is challenging due to the need for multiple colors.
Purpose of the Study:
- To develop a novel method for achieving white-light emission from COFs.
- To explore the potential of grafting lanthanide ions onto COFs for luminescence applications.
Main Methods:
- Grafting of lanthanide (Eu3+/Tb3+) β-diketonate complexes onto a two-dimensional imine COF (TTA-DFP-COF).
- Characterization of luminescence properties of the hybrid materials.
- Exploitation of reticular construction for ion coordination within the COF structure.
Main Results:
- Successful incorporation of red-light emitting Eu3+ and green-light emitting Tb3+ complexes into the COF.
- Generation of white-light emission by combining the grafted lanthanide emissions with the inherent blue light of the COF.
- Demonstration of tunable excitation properties for the hybrid materials.
Conclusions:
- COFs can effectively host lanthanide complexes for tunable luminescence.
- This approach provides a viable route to white-light emission from COFs.
- The developed materials show promise for optoelectronics, microscopy, optical sensing, and bioassays.
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