한국정보디스플레이학회:학술대회논문집
- 2002.08a
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- Pages.479-482
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- 2002
Alignment of smectic liquid crystals on newly synthesized photo-reactive polyimide with chalcone moiety
- Song, Dong-Mee (Dept. of Chem. Eng., Hongik University) ;
- Shin, Dong-Myung (Dept. of Chem. Eng., Hongik University) ;
- Kim, Jae-Hoon (Dept. of Physics, Hallym University) ;
- Kim, Il (Dept. of Physics, Hallym University)
- Published : 2002.08.21
Abstract
Benzylideneacetophenones are known as chalcones[1]. The chalcone has been known to be a photo-isomerizable and photo-dimerizable chromophore. The chalcone derivatives were prepared by base-catalyzed condensation of aldehydes and acetophenones, which were substituted with various alkyl chains. The synthesized chalcone was introduced into the t-BOC protected diamine through William synthesis reaction. Photocrosslinkable polyimide was prepared via one-step imidization reaction of DOCDA (5-(2,5-dioxotetrahydro furyl}-3-methyl-3-cyclohexene-1,2-dicarboxylic anhydride) and the chalcone introduced diamine using isoquinoline (5 wt%) in m-cresol. The polyimide solutions were spin-coated onto the quartz, silicone wafer and glass substrates and the obtained thin films were irradiated obliquely with linearly polarized UV light.
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