Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Imaging on a Vapor Deposited Film by Photopolymerization of a Rod-Like Molecule Consisting of Two Diacetylenic Groups

  • Chang, Ji-Young (School of Material Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering ENG445, Seoul National University) ;
  • Kyung Seo (School of Material Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering ENG445, Seoul National University) ;
  • Cho, Hyun-Ju (School of Material Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering ENG445, Seoul National University) ;
  • Lee, Cheol-Ju (School of Material Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering ENG445, Seoul National University) ;
  • Lee, Changjin (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Yongku Kang (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jaehyung (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • Published : 2002.08.01
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Abstract

A linear rod-like molecule, bis[4-(1,3-octadynyl)phenyl] terephthalate (2), consisting of two diacetylenic groups, was prepared. The unsymmetric diacetylene was prepared by the Cadiot-Chodkiewicz coupling reaction of 1-bromohexyne with 4-ethynylphenol and linked to a benzene core by an esterification reaction with terephthaloyl chloride in tetrahydrofuran. The thin film (200 nm thickness) of compound 2 was fabricated by the physical vapor deposition on a glass plate with a thermal evaporator. In the X-ray diffraction (XRD) study, the vapor deposited film on the glass plate showed peaks with d spacings of 19.4, 5.7, and 4.5 $\AA$. This XRD pattern was quite different from that observed for compound 2 isolated by recrystallization from methylene chloride/hexane. The vapor deposited film was polymerized by UV irradiation. Photopolymerization was carried out through a photomask, resulting in a patterned image, where the irradiated part became isotropic.

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