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Unlocking Enhanced Switching Capacities in DASA-Functionalized Coordination Complex
Peng-Xuan Zheng1, Di-Yu Dou1, Song-Lin Ou1
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
Inorganic Chemistry
|August 14, 2025
Summary
Researchers developed a novel smart material by combining photoswitchable Donor-Acceptor Stenhouse Adducts (DASAs) with coordination chemistry. This new material shows enhanced light-responsive properties and enables erasable writing using water and light.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Organic Chemistry
Background:
- Photoswitchable molecules are key components in developing smart materials.
- Donor-Acceptor Stenhouse Adducts (DASAs) are a novel class of organic photoswitches with negative photochromism and visible-light responsiveness.
- Enhancing the functional capabilities and overcoming limitations of DASAs is crucial for their practical application.
Purpose of the Study:
- To synthesize and characterize the first well-defined crystalline coordination complex from DASAs.
- To investigate the enhanced solid-state thermo- and photoswitching properties of the DASA-based coordination complex.
- To explore the dynamic behavior and tunable physical properties of the coordination material for advanced applications.
Main Methods:
- Dual-site coordination approach to synthesize DASA-based coordination complexes.
- Characterization of crystalline coordination complexes.
- Evaluation of solid-state thermo- and photoswitching properties.
- Analysis of stimuli-responsive behavior and tunable physical properties.
Main Results:
- The first well-defined crystalline coordination complex from DASAs was successfully synthesized.
- The coordination complex exhibited significantly enhanced solid-state thermo- and photoswitching properties compared to the parent DASA ligand.
- The material demonstrated distinct responses to various stimuli, leading to multiple accessible states with tunable properties like stepped color changes and fluorochromism.
- Erasable writing using water as ink and light as the erasing mechanism was demonstrated.
Conclusions:
- Coordination chemistry significantly enhances the properties of DASAs, creating advanced smart materials.
- The dynamic and stimuli-responsive nature of the DASA coordination complex offers a versatile platform for applications in rewritable materials, information encoding, and molecular devices.
- This work presents a significant advance in sustainable and environmentally conscious materials development.
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