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Ligand Synergy-Driven Room-Temperature Transformation from ZnSe Prenucleation Clusters to Magic-Size Clusters with
Qiu Shen1, Chaoran Luan2, Chunchun Zhang3
1Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610065, P. R. China.
Inorganic Chemistry
|December 31, 2025
Summary
Researchers developed a new room-temperature method for synthesizing specific ZnSe magic-size clusters (MSCs). This strategy uses a synergistic effect between octylamine (OTA) and methanol (MeOH) ligands to control the transformation of prenucleation clusters (PNCs) into desired MSCs.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Synthesis
Background:
- Selective synthesis of magic-size clusters (MSCs) is key for tuning material properties.
- The influence of surface ligands on MSC formation pathways, especially for ZnSe, is not well understood.
Purpose of the Study:
- To develop a ligand synergy-driven strategy for room-temperature synthesis of specific ZnSe MSCs.
- To elucidate the transformation pathway from ZnSe prenucleation clusters (PNCs) to MSC-320.
Main Methods:
- A two-step synthesis approach involving ZnSe PNCs dispersed in cyclohexane, octylamine (OTA), and methanol (MeOH).
- Characterization using optical absorption and nuclear magnetic resonance (NMR) spectroscopy.
- Kinetic analysis to determine the reaction order and rate constant.
Main Results:
- Achieved room-temperature transformation of ZnSe PNCs to MSC-320.
- Demonstrated that product selectivity is critically dependent on the synergistic interaction between OTA and MeOH.
- Identified ligand exchange equilibria and hydrogen-bonding interactions as key factors governing the transformation pathway.
- Determined the formation of MSC-320 follows first-order kinetics with a rate constant of 0.02 min-1, suggesting an isomerization mechanism.
Conclusions:
- Established a synergistic ligand strategy for precise, room-temperature synthesis of targeted semiconductor MSCs.
- Clarified a PNC-based transformation pathway for ZnSe MSC formation.
- Highlighted the importance of ligand engineering in controlling semiconductor cluster synthesis.
