Acetylene-containing highly birefringent rod-type reactive liquid crystals based on 2-methylhydroquinone

Hyein Jung, Ji Ho Yun, Inhye Jeon, Jinsoo Kim, Yun Ho Kim, Mi Hye Yi, Jinhan Cho, Eunkyoung Kim, Jae Won Ka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

New highly birefringent reactive liquid crystal materials based on the 2-methylhydroquinone core were designed and synthesised. Rod-type liquid crystal compounds bearing photo-crosslinkable reactive group of acryloyl, methacryloyl, cinnamoyl, furylacryloyl group were synthesised by introducing acetylene groups via Sonogashira coupling to obtain high birefringence, and lateral groups such as fluoro and methyl to adjust the temperature of the liquid crystal phase. The synthesised compounds were characterised using nuclear magnetic resonance spectroscopy, mass spectrometry and elemental analysis. In addition, their thermal behaviour was investigated using differential scanning calorimetry and polarised optical microscopy. After aligning the synthesised compounds, liquid crystal films were prepared by photo-irradiation. Photo-elastic modulator results showed that the obtained liquid crystal films had high birefringence (Δn) values of 0.32–0.40.

Original languageEnglish
Pages (from-to)279-291
Number of pages13
JournalLiquid Crystals
Volume45
Issue number2
DOIs
Publication statusPublished - 2018 Jan 26

Fingerprint

Liquid Crystals
Acetylene
acetylene
Liquid crystals
rods
liquid crystals
Birefringence
birefringence
Bearings (structural)
magnetic resonance spectroscopy
Modulators
Nuclear magnetic resonance spectroscopy
Optical microscopy
Mass spectrometry
modulators
Differential scanning calorimetry
mass spectroscopy
heat measurement
2-methyl-1,4-hydroquinone
Irradiation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Jung, Hyein ; Yun, Ji Ho ; Jeon, Inhye ; Kim, Jinsoo ; Kim, Yun Ho ; Yi, Mi Hye ; Cho, Jinhan ; Kim, Eunkyoung ; Ka, Jae Won. / Acetylene-containing highly birefringent rod-type reactive liquid crystals based on 2-methylhydroquinone. In: Liquid Crystals. 2018 ; Vol. 45, No. 2. pp. 279-291.
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abstract = "New highly birefringent reactive liquid crystal materials based on the 2-methylhydroquinone core were designed and synthesised. Rod-type liquid crystal compounds bearing photo-crosslinkable reactive group of acryloyl, methacryloyl, cinnamoyl, furylacryloyl group were synthesised by introducing acetylene groups via Sonogashira coupling to obtain high birefringence, and lateral groups such as fluoro and methyl to adjust the temperature of the liquid crystal phase. The synthesised compounds were characterised using nuclear magnetic resonance spectroscopy, mass spectrometry and elemental analysis. In addition, their thermal behaviour was investigated using differential scanning calorimetry and polarised optical microscopy. After aligning the synthesised compounds, liquid crystal films were prepared by photo-irradiation. Photo-elastic modulator results showed that the obtained liquid crystal films had high birefringence (Δn) values of 0.32–0.40.",
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Acetylene-containing highly birefringent rod-type reactive liquid crystals based on 2-methylhydroquinone. / Jung, Hyein; Yun, Ji Ho; Jeon, Inhye; Kim, Jinsoo; Kim, Yun Ho; Yi, Mi Hye; Cho, Jinhan; Kim, Eunkyoung; Ka, Jae Won.

In: Liquid Crystals, Vol. 45, No. 2, 26.01.2018, p. 279-291.

Research output: Contribution to journalArticle

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AU - Jung, Hyein

AU - Yun, Ji Ho

AU - Jeon, Inhye

AU - Kim, Jinsoo

AU - Kim, Yun Ho

AU - Yi, Mi Hye

AU - Cho, Jinhan

AU - Kim, Eunkyoung

AU - Ka, Jae Won

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AB - New highly birefringent reactive liquid crystal materials based on the 2-methylhydroquinone core were designed and synthesised. Rod-type liquid crystal compounds bearing photo-crosslinkable reactive group of acryloyl, methacryloyl, cinnamoyl, furylacryloyl group were synthesised by introducing acetylene groups via Sonogashira coupling to obtain high birefringence, and lateral groups such as fluoro and methyl to adjust the temperature of the liquid crystal phase. The synthesised compounds were characterised using nuclear magnetic resonance spectroscopy, mass spectrometry and elemental analysis. In addition, their thermal behaviour was investigated using differential scanning calorimetry and polarised optical microscopy. After aligning the synthesised compounds, liquid crystal films were prepared by photo-irradiation. Photo-elastic modulator results showed that the obtained liquid crystal films had high birefringence (Δn) values of 0.32–0.40.

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