| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.676 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Application of Substituted Polyacetylene to Fluorescence Imaging |
| 초록 | Recently, fluorescence (FL) imaging technique has been extensively exploited in the field of photonic/electronic devices materials science.1 Substituted polyacetylenes usually appear to be unstable in air because of oxidative cleavage of the C=C double bonds of the main chain by heating or light-irradiation. In aromatic polyacetylenes, however, the radicals formed by irradiation or compression are stable due to delocalization of the energy absorbed, and the mobile unpaired electrons called solitons do not possess an ability of hydrogen abstraction from aryl groups because of higher bonding energy of aromatic hydrogen. This implies that the aromatic polyacetylenes are able to afford effectively biradical in the main chain on light irradiation while avoiding degradation as much as possible. The photophysical properties of the aromatic polyacetylenes may also significantly change on the photoirradiation due to the formation of peroxy radical in the main chain because such conjugated polymer usually exhibits collective properties that are sensitive to very minor perturbations. Among aromatic polyacetylenes we developed previously, the disubstituted polyacetylene, poly[1-(trimethylsilyl)phenyl-2-phenylacetylene] (PTMSDPA in Figure) is intensively fluorescent whereas most monosubstituted polyacetylenes are absolutely not. The polymer obtained with TaCl5–n-Bu4Sn catalyst possesses a high molecular weight larger than 1.0 x 106, and is quite soluble in organic solvents such as chloroform and toluene and then provides a free standing membrane with excellent mechanical strength and thermal stability. In this study, we demonstrated that PTMSDPA is excellent candidate material for FL imaging. The fluorescence of the thin film of PTMSDPA was significantly quenched by UV irradition and finely resolved fluorescent images were obtained easily by exposing through photomask as shown in Figure. References 1) a)Kim, J.-M.; Chang, T.-E.; Kang, J.-H.; Park, K. H.; Han, D.-K.; Ahn, K.-D. Angew. Chem. Int. Ed. 2000, 39, 1780-1782. b)Kim, J.-M.; Chang, T.-E.; Kang, J.-H.; Han, D.-K.; Ahn, K.-D. Adv. Mater. 1999, 11, 1499-1501. |
| 저자 | Giseop KWAK1, Michiya FUJIKI1, Toshio MASUDA2 |
| 소속 | 1NAIST, 2Kyoto Univ. |
| 키워드 | substituted polyacetylene; fluorescence; imaging |
