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Atomically Precise Cu12 Nanoclusters with Thermally Activated Delayed Fluorescence Properties
Xueli Sun1, Wen-Ya Jiang2, Peiling Du1
1College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China.
Inorganic Chemistry
|December 24, 2024
Summary
Researchers synthesized a novel copper nanocluster exhibiting thermally activated delayed fluorescence (TADF). This pioneering work opens new avenues for copper-based materials in light-emitting applications.
Area of Science:
- Materials Science
- Nanotechnology
- Photochemistry
Background:
- Ligand-stabilized metal nanoclusters are crucial for light-emitting and harvesting applications.
- Thermally activated delayed fluorescence (TADF) properties are highly desirable in nanoclusters.
- Research on copper nanoclusters with TADF properties lags behind gold and silver counterparts.
Purpose of the Study:
- To synthesize and characterize a copper nanocluster with TADF properties.
- To determine the precise molecular structure of the copper cluster.
- To investigate the photoluminescent properties and TADF characteristics of the synthesized cluster.
Main Methods:
- Synthesis of the copper cluster: (PPh4)[Cu12(NO3)6(AdmS)6] in a single reaction under air.
- Characterization techniques: Electrospray ionization mass spectroscopy (ESI-MS), X-ray photoelectron spectroscopy, nuclear magnetic resonance, and UV-vis spectroscopy.
- Structural determination: X-ray crystallographic analysis.
Main Results:
- Successful synthesis and full characterization of a novel copper nanocluster.
- X-ray crystallography revealed a Cu12 core (Cu3@Cu6@Cu3) stabilized by nitrate and adamantanethiolate ligands.
- The copper nanocluster exhibited photoluminescence and typical TADF characteristics between 163-243 K in both crystalline and solution states.
Conclusions:
- This study presents the first example of a copper nanocluster with TADF properties.
- The findings highlight the potential of copper nanoclusters for advanced light-emitting applications.
- This research paves the way for future development of copper-based materials in material science.
