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Ligand Engineering Enhances Electrical Conductivity in Photoluminescent Coordination Polymers.
Feng Hu1, Yang Chen1, Mengkai Zuo1
1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis & Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China.
Inorganic Chemistry
|July 21, 2025
Summary
Researchers engineered photoluminescent coordination polymers (CPs) with enhanced electrical conductivity. Ligand modification improved charge transport by controlling π-π stacking interactions, crucial for energy applications.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Metal-organic frameworks (MOFs) and coordination polymers (CPs) show potential in energy applications but suffer from poor electrical conductivity due to electron-hole recombination.
- Controllable regulation of charge transport properties in MOFs/CPs is a significant challenge.
Purpose of the Study:
- To develop a ligand engineering strategy to enhance the electrical conductivity of photoluminescent CPs.
- To investigate the relationship between ligand structure, π-π stacking, and charge transport properties.
Main Methods:
- Synthesized pyridyl-modified triazolyl ligands and Cu(I) metal centers to create photoluminescent CPs.
- Modulated ligand substituents and isomerism to achieve varied structural topologies and π-π stacking sequences.
- Systematically studied the structure-property relationship, correlating π-π stacking with photoluminescence quantum yield (PLQY) and electrical conductivity.
Main Results:
- Achieved distinct structural topologies with varied π-π stacking sequences through ligand engineering.
- Observed a decrease in PLQY from 19.36% to 7.89% with increased π-π stacking.
- Demonstrated a remarkable increase in electrical conductivity from 9.04 × 10-7 to 1.11 × 10-5 S cm-1 at room temperature as π-π stacking intensified.
Conclusions:
- Ligand engineering is an effective strategy for tailoring charge transport properties in photoluminescent CPs.
- π-π stacking interactions play a critical role in governing the conductive performance of these materials.
- This work provides a molecular approach for enhancing electrical conductivity in MOFs/CPs for energy storage and conversion.
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