Photo-alignment of low-molecular mass nematic liquid crystals on photochemically bifunctional chalcone-epoxy film by irradiation of a linearly polarized UV light

Dong Hoon Choi, Young Kwan Cha

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15 Citations (Scopus)


Photocrosslinkable chalcone-epoxy compound comprising 1,3-bis-(4-hydroxy-phenyl)-propenone was synthesized for fabricating the photo-alignment layer of liquid crystals. Chalcone group was introduced into the main chain unit of the epoxy oligomer. We observed a photodimerization behavior and an optical anisotropy of this material by irradiation of a linearly polarized UV(LP-UV) light. With a trace amount of cationic photoinitiator (TRS-HFA), polymerization of epoxy groups was also conducted at the similar wavelength range used for photodimerization. Linearly polarized UV irradiation on the chalcone-epoxy films with cationic photoinitiator induced optical anisotropy of the film and the resultant film can be used for alignment layers for low molecular weight nematic liquid crystals.

Original languageEnglish
Pages (from-to)587-592
Number of pages6
JournalBulletin of the Korean Chemical Society
Issue number4
Publication statusPublished - 2002 Apr 20
Externally publishedYes



  • Chalcone-epoxy
  • Liquid crystal alignment
  • Optical anisotropy
  • Photodimerization
  • Photopolymerization

ASJC Scopus subject areas

  • Chemistry(all)

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