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Synthesis and mesomorphic behavior of novel (bisthiophene)benzene carbazole nematic liquid crystals.

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Title: Synthesis and mesomorphic behavior of novel (bisthiophene)benzene carbazole nematic liquid crystals.
Authors: Hu, Guang1,2 (AUTHOR), Kitney, Stuart P.3 (AUTHOR), Liu, Yanfang1 (AUTHOR), Zhang, Kailong1 (AUTHOR)
Source: Molecular Crystals & Liquid Crystals. 2021, Vol. 723 Issue 1, p81-92. 12p.
Subjects: Nematic liquid crystals, Carbazole, Liquid crystal states, Structural isomers, Benzene, Band gaps
Abstract: Two structural isomers of highly conjugated (bisthiophene)benzene carbazoles were designed and synthesized to study the effect of the substitution pattern on their liquid crystalline behavior, transition temperatures, energy levels, and band gaps. Unusually, only the isomer A with shorter terminal methyl chains exhibits a liquid crystalline phase, while the isomer B with longer octyl chains does not. It is because longer terminal octyl chains of isomer B strengthen not only the small angle between symmetrical sides of the aromatic backbone, but also the angle between the terminal alkyl chains and the aromatic backbone, thereby leading to a lower length-to-breadth ratio. [ABSTRACT FROM AUTHOR]
Copyright of Molecular Crystals & Liquid Crystals is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 154122375
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Synthesis and mesomorphic behavior of novel (bisthiophene)benzene carbazole nematic liquid crystals.
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  Data: <searchLink fieldCode="AR" term="%22Hu%2C+Guang%22">Hu, Guang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kitney%2C+Stuart+P%2E%22">Kitney, Stuart P.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Yanfang%22">Liu, Yanfang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Kailong%22">Zhang, Kailong</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Molecular+Crystals+%26+Liquid+Crystals%22">Molecular Crystals & Liquid Crystals</searchLink>. 2021, Vol. 723 Issue 1, p81-92. 12p.
– Name: Subject
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  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Nematic+liquid+crystals%22">Nematic liquid crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Carbazole%22">Carbazole</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+crystal+states%22">Liquid crystal states</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+isomers%22">Structural isomers</searchLink><br /><searchLink fieldCode="DE" term="%22Benzene%22">Benzene</searchLink><br /><searchLink fieldCode="DE" term="%22Band+gaps%22">Band gaps</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Two structural isomers of highly conjugated (bisthiophene)benzene carbazoles were designed and synthesized to study the effect of the substitution pattern on their liquid crystalline behavior, transition temperatures, energy levels, and band gaps. Unusually, only the isomer A with shorter terminal methyl chains exhibits a liquid crystalline phase, while the isomer B with longer octyl chains does not. It is because longer terminal octyl chains of isomer B strengthen not only the small angle between symmetrical sides of the aromatic backbone, but also the angle between the terminal alkyl chains and the aromatic backbone, thereby leading to a lower length-to-breadth ratio. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Molecular Crystals & Liquid Crystals is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/15421406.2021.1895960
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 81
    Subjects:
      – SubjectFull: Nematic liquid crystals
        Type: general
      – SubjectFull: Carbazole
        Type: general
      – SubjectFull: Liquid crystal states
        Type: general
      – SubjectFull: Structural isomers
        Type: general
      – SubjectFull: Benzene
        Type: general
      – SubjectFull: Band gaps
        Type: general
    Titles:
      – TitleFull: Synthesis and mesomorphic behavior of novel (bisthiophene)benzene carbazole nematic liquid crystals.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Hu, Guang
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          Name:
            NameFull: Kitney, Stuart P.
      – PersonEntity:
          Name:
            NameFull: Liu, Yanfang
      – PersonEntity:
          Name:
            NameFull: Zhang, Kailong
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          Dates:
            – D: 01
              M: 07
              Text: 2021
              Type: published
              Y: 2021
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              Value: 15421406
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              Value: 723
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              Value: 1
          Titles:
            – TitleFull: Molecular Crystals & Liquid Crystals
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