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Updated: Jan 16, 2026
09:26
Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
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Thermal-mediated modulation of binary supramolecular self-assembly from phase separation to co-crystallization at the
Fang Chen1, Jun He1, Attia Shaheen1
1Institute for Advanced Study, Shenzhen University Shenzhen Guangdong 518060 China sllee@szu.edu.cn.
Chemical Science
|January 15, 2026
Summary
Thermal activation enables stable co-crystallization in organic materials, transitioning from phase separation to ordered structures. This discovery offers a new method for controlling supramolecular assembly through temperature modulation.
Area of Science:
- Materials Chemistry
- Supramolecular Chemistry
- Surface Science
Background:
- Organic materials and self-assembled architectures are crucial for applications like organic transistors and photovoltaic cells.
- Binary supramolecular systems face challenges like phase segregation due to complex hetero-molecular interactions.
Purpose of the Study:
- To investigate the thermal transition from phase separation to co-crystallization in a host-guest supramolecular system.
- To explore the influence of temperature on the structure and stability of co-assembled organic materials.
Main Methods:
- Scanning tunnelling microscopy (STM) was used to observe the self-assembly process.
- Force-field simulations were employed to derive the energy landscape and molecular interactions.
Main Results:
- Thermal activation (25 °C to 60 °C) induced a transition from phase separation to stable co-crystallization.
- Co-crystal structures evolved from a 'chicken-wire' to a 'flower' type with increasing annealing temperature (60 °C to 80 °C).
- Simulations revealed that modulation of molecule-substrate interactions, intermolecular bonding, and hetero-molecular attractions govern the transformation.
Conclusions:
- Temperature provides a tunable pathway for controlling supramolecular co-assembly in binary organic systems.
- Achieving thermodynamically stable co-crystals is possible by managing thermal conditions.
- This research offers insights into designing ordered organic materials for advanced applications.
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