Browse > Article
http://dx.doi.org/10.5012/bkcs.2002.23.4.587

Photo-alignment of Low-molecular Mass Nematic Liquid Crystals on Photochemically Bifunctional Chalcone-epoxy Film by Irradiation of a Linearly Polarized UV Light  

Choi, Dong-Hoon
Cha, Young-Kwan
Publication Information
Bulletin of the Korean Chemical Society / v.23, no.4, 2002 , pp. 587-592 More about this Journal
Abstract
Photocrosslinkable chalcone-epoxy compound comprising 1,3-bis-(4-hydroxy-phenyl)-propenone was synthe-sized 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.
Keywords
Optical anisotropy; Chalcone-epoxy; Photodimerization; Photopolymerization; Liquid crysta alignment.;
Citations & Related Records

Times Cited By Web Of Science : 7  (Related Records In Web of Science)
Times Cited By SCOPUS : 7
연도 인용수 순위
1 Natansohn, A.; Rochon, P.; Meng, X.; Barrett, C.; Buffeteau, T.;Bonenfant, S.; Pezolet, M. Macromolecules 1998, 31, 1155.   DOI   ScienceOn
2 Schadt, M.; Seiberle, H.; Schuster, A. Nature 1996, 381, 212.   DOI   ScienceOn
3 Makita, Y.; Natsui, T.; Kimura, S.; Kimura, M.; Matsuki, Y.;Takeuchi, Y. J. Photopoly. Sci. Technol. 1998, 11, 187.   DOI   ScienceOn
4 Crivello, J. V.; Liu, S. S. J. Polym. Sci. A, Polym. Chem. Ed. 1999,37(8), 1199.   DOI   ScienceOn
5 Lazauskaite, R.; Buika, G.; Grazulevicius, R.; Kavaliunas, R. Eur.Polym. J. 1998, 34(8), 1171.   DOI   ScienceOn
6 Akelah, A.; Selim, A.; El-Deen, S. N. Polym. International 1993,32, 423.   DOI   ScienceOn
7 Ichimura, K.; Akita, Y.; Akiyama, H.; Kudo, K.; Hayashi, Y.Macromolecules 1997, 30, 903.   DOI   ScienceOn
8 Lien, A.; John, R. A.; Angelopoulos, M.; Lee, K. W.; Takano, H.;Tajima, K.; Takenaka, A. Appl. Phys. Lett. 1995, 67(21), 20.
9 Choi, D. H.; Oh, S. J.; Cha, H. B.; Lee, J. Y. Eur. Polym. J. 2001,37, 1943.   DOI   ScienceOn
10 Sekkat, Z.; Morichere, D.; Dumont, M.; Loucif-Saibi, R.; Delaire,J. J. Appl. Phys. 1992, 71, 1543.   DOI
11 Janning, J. Appl. Phys. Lett. 1992, 21, 173.   DOI
12 Hsieh, H.-K.; Lee, T.-H.; Wang, J.-P.; Wang, J.-J.; Lin, C.-N.Pharmaceutical Research 1998, 15(1), 39.   DOI   ScienceOn
13 Watanabe, S.; Harashima, S.; Tsukada, N. J. Polym. Sci. A Polym.Chem. Ed. 1986, 24, 1227.   DOI   ScienceOn
14 Murata, M.; Awaji, H.; Isurugi, M.; Uekita, M.; Tawada, Y. Jpn. J.Appl. Phys. 1992, 31, L189.   DOI
15 Kaur, S.; Crivello, J. V.; Pascuzzi, N. J. Polym. Sci. A, Polym.Chem. Ed. 1999, 37(2), 199.   DOI   ScienceOn
16 O'Neill, M.; Kelly, S. M. J. Phys. D: Appl. Phys. 2000, 33, R67.   DOI   ScienceOn
17 Ichimura, K. Chemical Review 2000, 100(5), 1847.   DOI   ScienceOn
18 Chen, J.; Cull, B.; Bos, P.; Johnson, D.; Schadt, M. SID 95 Digest1995, 528.
19 Park, B.; Jung, Y.; Choi, H.-H.; Hwang, H.-K.; Kim, Y.; Lee, S.;Jang, S.-H.; Kakimoto, M.; Takezoe, H. Jpn. J. Appl. Phys. 1998,37, 5663.   DOI
20 Akelah, A.; Selim, A.; El-Deen, S. N. Polym. International 1992,28, 307.   DOI
21 Kawatsuki, N.; Takatsuka, H.; Kawakami, Y.; Yamamoto, T.Polym. Adv. Technol. 1999, 10, 429.   DOI   ScienceOn
22 Obi, M.; Morino, S.; Ichimura, K. Chem. Mater. 1999, 11, 656.   DOI   ScienceOn
23 Ichimura, K. Liquid Crystals 1996, 3, 67.
24 Iimura, Y.; Kobayashi, S.; Hashimoto, T.; Sugiyama, T.; Katoh, K.IEICE Transactions on Electronics 1996, V.E79-C N.8.
25 Ichimura, K.; Suzuki, T.; Kawanishi, Y.; Tamaki, T.; Aoki, K.Makromol. Chem. Rapid Commun. 1989, 10, 5.   DOI
26 Choi, D. H.; Oh, S. J.; Ban, S. Y.; Oh, K. Y. Bull. Korean Chem.2001, 22(11), 1207.
27 Jain, S. C.; Kitzerow, H. S. Appl. Phys. Lett. 1994, 64, 2946.   DOI   ScienceOn