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Alkoxy chain number effect on the mesomorphism, photophysical and gelation properties in aroylhydrazone-based mesogens.

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Title: Alkoxy chain number effect on the mesomorphism, photophysical and gelation properties in aroylhydrazone-based mesogens.
Authors: Kanth, Priyanka1 (AUTHOR), Rao, D. S. Shankar2 (AUTHOR), Prasad, S. Krishna2 (AUTHOR), Singh, Bachcha1 (AUTHOR) bsinghbhu@rediffmail.com
Source: Liquid Crystals. Jul/Aug2025, Vol. 52 Issue 9/10, p664-675. 12p.
Subjects: Gelation, Optoelectronic devices, Alkoxy group, Optical properties, Phase transitions, Nanofibers, Mesoionic compounds, Liquid crystals
Abstract: We report the synthesis, mesomorphic, photophysical and gelation behaviour of three series of aroylhydrazone-based polycatenars equipped with amide and ester linkages. All the series had two alkoxy chains at 3- and 5-positions at the amide end and the number and position of alkoxy chains at the ester end were sequentially increased. It was observed that the first series with alkoxy chain at 4-position at the ester end showed columnar oblique mesophase. Next, the series with alkoxy chain at 3- and 5-positions at the ester end showed columnar hexagonal mesophase. Further, the series with alkoxy chain at 3-, 4- and 5-positions at ester end showed columnar hexagonal mesophase. Similar absorption and emission spectra were observed for all the series. Only one compound showed gelation property with critical gelation concentration CGC (wt %) 1% or less than 1% in decane, dodecane and hexadecane. The FESEM image of the morphology of the gel showed a highly entangled network of nanofibers of several micrometres in length. Such mesogenic xerogels have immense potential for applications in optoelectronic devices. [ABSTRACT FROM AUTHOR]
Copyright of 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: 189686158
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Alkoxy chain number effect on the mesomorphism, photophysical and gelation properties in aroylhydrazone-based mesogens.
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  Data: <searchLink fieldCode="JN" term="%22Liquid+Crystals%22">Liquid Crystals</searchLink>. Jul/Aug2025, Vol. 52 Issue 9/10, p664-675. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Gelation%22">Gelation</searchLink><br /><searchLink fieldCode="DE" term="%22Optoelectronic+devices%22">Optoelectronic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Alkoxy+group%22">Alkoxy group</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofibers%22">Nanofibers</searchLink><br /><searchLink fieldCode="DE" term="%22Mesoionic+compounds%22">Mesoionic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+crystals%22">Liquid crystals</searchLink>
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  Data: We report the synthesis, mesomorphic, photophysical and gelation behaviour of three series of aroylhydrazone-based polycatenars equipped with amide and ester linkages. All the series had two alkoxy chains at 3- and 5-positions at the amide end and the number and position of alkoxy chains at the ester end were sequentially increased. It was observed that the first series with alkoxy chain at 4-position at the ester end showed columnar oblique mesophase. Next, the series with alkoxy chain at 3- and 5-positions at the ester end showed columnar hexagonal mesophase. Further, the series with alkoxy chain at 3-, 4- and 5-positions at ester end showed columnar hexagonal mesophase. Similar absorption and emission spectra were observed for all the series. Only one compound showed gelation property with critical gelation concentration CGC (wt %) 1% or less than 1% in decane, dodecane and hexadecane. The FESEM image of the morphology of the gel showed a highly entangled network of nanofibers of several micrometres in length. Such mesogenic xerogels have immense potential for applications in optoelectronic devices. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of 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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      – Type: doi
        Value: 10.1080/02678292.2025.2507134
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 664
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      – SubjectFull: Gelation
        Type: general
      – SubjectFull: Optoelectronic devices
        Type: general
      – SubjectFull: Alkoxy group
        Type: general
      – SubjectFull: Optical properties
        Type: general
      – SubjectFull: Phase transitions
        Type: general
      – SubjectFull: Nanofibers
        Type: general
      – SubjectFull: Mesoionic compounds
        Type: general
      – SubjectFull: Liquid crystals
        Type: general
    Titles:
      – TitleFull: Alkoxy chain number effect on the mesomorphism, photophysical and gelation properties in aroylhydrazone-based mesogens.
        Type: main
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          Name:
            NameFull: Kanth, Priyanka
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            NameFull: Rao, D. S. Shankar
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            NameFull: Prasad, S. Krishna
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            NameFull: Singh, Bachcha
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            – D: 01
              M: 07
              Text: Jul/Aug2025
              Type: published
              Y: 2025
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              Value: 52
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              Value: 9/10
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            – TitleFull: Liquid Crystals
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