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Turning on solid-state phosphorescence of platinum acetylides with aromatic stacking
William J Mullin1, Huan Qin, Tomoyasu Mani
1Department of Chemistry, Tufts University, 62 Talbot Ave, Medford, MA 02155, USA. sam.thomas@tufts.edu.
Chemical Communications (Cambridge, England)
|May 21, 2020
Summary
Researchers developed a platinum acetylide (PtPE) material that glows in solid form. This breakthrough overcomes aggregation-caused quenching, a common issue that dims phosphorescent materials.
Area of Science:
- Materials Science
- Photochemistry
- Supramolecular Chemistry
Background:
- Phosphorescence in neat solids is often hindered by aggregation-caused quenching (ACQ).
- Developing solid-state emitters requires strategies to mitigate intermolecular interactions.
Purpose of the Study:
- To design and synthesize a platinum acetylide (PtPE) exhibiting solid-state phosphorescence.
- To investigate the role of programmed aromatic stacking in preventing aggregation-caused quenching.
Main Methods:
- Synthesis of a novel platinum acetylide complex with pendant aromatic groups.
- Solid-state photoluminescence spectroscopy to assess phosphorescence.
- Crystallography and computational modeling to analyze molecular packing and interactions.
Main Results:
- The synthesized platinum acetylide (PtPE) demonstrated strong phosphorescence in the solid state.
- Programmed aromatic stacking interactions were confirmed to prevent intermolecular aggregation.
- The PtPE material effectively suppressed aggregation-caused quenching.
Conclusions:
- Platinum acetylides can be designed for efficient solid-state phosphorescence.
- Controlled intermolecular interactions through pendant group engineering are key to overcoming ACQ.
- This work offers a new strategy for developing advanced luminescent solid materials.
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