Facile one-pot synthesis of a photo patternable anthracene polymer |
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Authors: | Krishnamurthy Rameshbabu |
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Institution: | Department of Chemical Engineering, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, 120-749 Seoul, Republic of Korea |
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Abstract: | A polycyclic aromatic compound, anthracene, was covalently connected through a methylene bridge via Friedel-Crafts alkylation reaction. Thus, a highly fluorescent anthracene polymer (PMAn) linked by a methylene unit was prepared in one step to produce a conjugated-nonconjugated spacer-type polymer through its reaction with chloromethyl methyl ether (CME) and FeCl3 at 0 °C. The resultant polymer was soluble in organic solvents and showed significantly higher fluorescence (quantum yield = 0.80) compared to monomeric anthracene, 9-methylanthracene, in chloroform solution. Fluorescent thin films of PMAn as solid media were prepared with high film uniformity. The emission of the film was extinguished when the film was exposed to a UV source, due to the photodimerization of anthracene unit. A fluorescent gap electrode pattern was formed on the polymer film-forming average step depth of 8 nm and 14 nm, after 30 and 60 min irradiation with a UV light, respectively. The photo patternable fluorescent polymer afforded a convenient method of image formation and patterning. |
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Keywords: | Anthracene Polymerization Friedel-Crafts alkylation Fluorescence Thin film Photodimerization Pattern |
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