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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
Aliphatic Ligand-Mediated Cu-Cu Distance Tuning Enables Near-Unity Efficient and Color-Tunable Circularly Polarized
Jiahui Li1, Fei Ge1,2,3, Hui Yan1
1School of Chemical Engineering and Technology, National Engineering Research Center of Industrial Crystallization Technology, Tianjin University, Tianjin, China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 21, 2026
Summary
Copper(I) iodide clusters offer vibrant multicolor circularly polarized luminescence (CPL). New strategies maintain high photoluminescence quantum yield (PLQY) across the emission spectrum for advanced CPL materials.
Area of Science:
- Materials Science
- Luminescence
- Coordination Chemistry
Background:
- Copper(I) iodide clusters are promising for multicolor circularly polarized luminescence (CPL) materials.
- A key challenge is maintaining high photoluminescence quantum yield (PLQY) during emission color tuning.
Purpose of the Study:
- To develop high-performance CPL materials by addressing the PLQY decrease during color tuning.
- To explore a new color tuning mechanism for copper(I) iodide clusters.
Main Methods:
- Utilized structurally related aliphatic ligands to minimize ligand-involved charge-transfer.
- Promoted cluster-centered emission from the inorganic [Cu4I4] core.
- Introduced chiral ligands to induce CPL activity.
Main Results:
- Achieved continuous emission tuning from green (550 nm) to red (633 nm) with near-unity PLQY.
- Maintained the [Cu4I4] cluster framework and enhanced hydrogen-bonding networks.
- Observed CPL activity with a luminescence dissymmetry factor (glum) up to 2.3 × 10⁻³.
Conclusions:
- Demonstrated a novel strategy for multicolor CPL materials by integrating near-unity PLQY with tunable CPL in metal hybrid clusters.
- Highlighted the potential of these Cu-I clusters for anticounterfeiting and encryption applications.
![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
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