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Published on: May 20, 2019
A soluble, low-temperature thermochromic and chemically reactive polydiacetylene
In Sung Park1, Hye Jin Park, Jong-Man Kim
1Department of Chemical Engineering and ‡Institute of Nanoscience and Technology, Hanyang University , Seoul 133-791, Korea.
Researchers developed a novel liquid diacetylene monomer (DA-NCO) that solidifies near 0°C. This polydiacetylene (PDA-NCO) exhibits a distinct blue-to-red thermochromic transition at 11°C and can detect primary amines.
Area of Science:
- Materials Science
- Polymer Chemistry
- Organic Chemistry
Background:
- Most polydiacetylenes (PDAs) exhibit thermochromic transitions above room temperature.
- Developing PDAs with tunable transition temperatures is crucial for new applications.
- A liquid diacetylene monomer is needed for facile processing and patterning.
Purpose of the Study:
- To design and synthesize a novel liquid diacetylene (DA) monomer with a low solidification point.
- To investigate the thermochromic properties and polymerization of the resulting PDA.
- To explore the potential applications of the new PDA in patterning and chemical sensing.
Main Methods:
- Synthesis of an isocyanate-containing DA monomer (DA-NCO) designed for low-temperature solidification.
- UV irradiation of frozen DA-NCO to induce polymerization into a blue PDA (PDA-NCO).
- Characterization of PDA-NCO's thermochromic behavior, solubility, and reactivity with amines.
Main Results:
- A liquid DA monomer, DA-NCO, was successfully synthesized, solidifying near 0 °C.
- UV irradiation of frozen DA-NCO yielded blue PDA-NCO, which showed a sharp blue-to-red transition at 11 °C.
- PDA-NCO could be patterned using stamping/writing methods and detected primary amines via a color change.
Conclusions:
- A novel liquid polydiacetylene monomer (DA-NCO) with a low solidification point was developed.
- The resulting PDA-NCO exhibits a low-temperature thermochromic transition and is suitable for patterning.
- PDA-NCO demonstrates potential as a sensor for primary amines through a distinct colorimetric response.
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