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

doi: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

Dong Hoon Choi, Young Kwan Cha

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	587-592
Number of pages	6
Journal	Bulletin of the Korean Chemical Society
Volume	23
Issue number	4
DOIs	https://doi.org/10.5012/bkcs.2002.23.4.587
Publication status	Published - 2002 Apr 20
Externally published	Yes

Keywords

Chalcone-epoxy
Liquid crystal alignment
Optical anisotropy
Photodimerization
Photopolymerization

ASJC Scopus subject areas

Chemistry(all)

Access to Document

10.5012/bkcs.2002.23.4.587

Cite this

@article{35fac2053e5648e2861f76131d48a24d,

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

abstract = "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.",

keywords = "Chalcone-epoxy, Liquid crystal alignment, Optical anisotropy, Photodimerization, Photopolymerization",

author = "Choi, {Dong Hoon} and Cha, {Young Kwan}",

year = "2002",

month = apr,

day = "20",

doi = "10.5012/bkcs.2002.23.4.587",

language = "English",

volume = "23",

pages = "587--592",

journal = "Bulletin of the Korean Chemical Society",

issn = "0253-2964",

publisher = "Wiley-Blackwell",

number = "4",

}

TY - JOUR

T1 - Photo-alignment of low-molecular mass nematic liquid crystals on photochemically bifunctional chalcone-epoxy film by irradiation of a linearly polarized UV light

AU - Choi, Dong Hoon

AU - Cha, Young Kwan

PY - 2002/4/20

Y1 - 2002/4/20

N2 - 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.

AB - 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.

KW - Chalcone-epoxy

KW - Liquid crystal alignment

KW - Optical anisotropy

KW - Photodimerization

KW - Photopolymerization

UR - http://www.scopus.com/inward/record.url?scp=0037140515&partnerID=8YFLogxK

U2 - 10.5012/bkcs.2002.23.4.587

DO - 10.5012/bkcs.2002.23.4.587

M3 - Article

AN - SCOPUS:0037140515

SN - 0253-2964

VL - 23

SP - 587

EP - 592

JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 4

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this