| 학회 |
한국고분자학회 |
| 학술대회 |
2020년 가을 (10/05 ~ 10/08, 부산컨벤션센터(BEXCO)) |
| 권호 |
45권 1호 |
| 발표분야 |
Mechanochemical Approach to Polymers |
| 제목 |
Fluorescence “turn-on” Upon Activating Mechanochemically Responsive Polymers |
| 초록 |
Covalent polymer mechanochemistry offers a platform for next generating materials featuring stress-sensing capability through facile detection of polymer chain scission events prior to the onset of catastrophic material failure. Externally applied mechanical force can be exploited to promote selective chemical transformation in the overstressed region, resulting in the formation of highly fluorescent moieties. Here we report that a Diels-Alder adduct based mechanophore, which unveils a highly fluorescent anthracene carboxyimide (ACI) through mechanically triggered retro Diels-Alder reaction. ACI exhibits a quantum yield (QY) of up to 85%, which is by far the brightest anthracene derivative suitable for stress-sensing. Pulsed ultrasonication and compression experiment result in appearance of fluorescence because of mechanically triggered chemical reaction. Relative mechanical labilities of several anthracene-based Diels-Alder adducts are established, revealing that ACI-maleimide adduct requires the highest force relative to other existing anthraces-based mechanophores. |
| 저자 |
Yu-Hsuan Tung1, Hao-Chun Chang2, Chia-Chih Chang1
|
| 소속 |
1Department of Applied Chemistry, 2National Chiao Tung Univ. |
| 키워드 |
- |
| E-Mail |
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