Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety
Two series of calamitic non-symmetric liquid crystalline dimer compound containing bisazobenzene moiety and a rather short alkoxybiphenyl linked by flexible spacers 4-propyloxy-[4-biphenyloxyalkyl]-4`-(4-phenylazo)azobenzene has been synthesized and characterized by spectroscopic methods. The transi...
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| Format: | Article |
| Language: | English |
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Knowledgia Review, Malaysia
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/16936/ |
| _version_ | 1848843100610363392 |
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| author | Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Lutfor, Md Rahman Ahmad, Mansor |
| author_facet | Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Lutfor, Md Rahman Ahmad, Mansor |
| author_sort | Salisu, Abdulsalam Abubakar |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Two series of calamitic non-symmetric liquid crystalline dimer compound containing bisazobenzene moiety and a rather short alkoxybiphenyl linked by flexible spacers 4-propyloxy-[4-biphenyloxyalkyl]-4`-(4-phenylazo)azobenzene has been synthesized and characterized by spectroscopic methods. The transition temperatures and phase behaviours were studied by Differential Scanning Calorimetry (DSC), Polarizing Optical Microscopy (POM) and X-Ray Diffraction (XRD) study. The synthesized compounds exhibited enantiotropic liquid crystal phase with dimer (D1) containing pentyl flexible alkyl spacer showing smectic A and smectic C phases and dimer (D2) with hexyl spacer exhibitig SmA and nemetic phases respectively and the stability of the smectic layer depends on the spacer length for the compounds studied.
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| first_indexed | 2025-11-15T08:09:40Z |
| format | Article |
| id | upm-16936 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:09:40Z |
| publishDate | 2009 |
| publisher | Knowledgia Review, Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-169362012-08-27T09:31:57Z http://psasir.upm.edu.my/id/eprint/16936/ Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Lutfor, Md Rahman Ahmad, Mansor Two series of calamitic non-symmetric liquid crystalline dimer compound containing bisazobenzene moiety and a rather short alkoxybiphenyl linked by flexible spacers 4-propyloxy-[4-biphenyloxyalkyl]-4`-(4-phenylazo)azobenzene has been synthesized and characterized by spectroscopic methods. The transition temperatures and phase behaviours were studied by Differential Scanning Calorimetry (DSC), Polarizing Optical Microscopy (POM) and X-Ray Diffraction (XRD) study. The synthesized compounds exhibited enantiotropic liquid crystal phase with dimer (D1) containing pentyl flexible alkyl spacer showing smectic A and smectic C phases and dimer (D2) with hexyl spacer exhibitig SmA and nemetic phases respectively and the stability of the smectic layer depends on the spacer length for the compounds studied. Knowledgia Review, Malaysia 2009 Article PeerReviewed Salisu, Abdulsalam Abubakar and Ab. Rahman, Mohamad Zaki and Silong, Sidik and Lutfor, Md Rahman and Ahmad, Mansor (2009) Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety. Current Research in Chemistry, 1 (1). pp. 15-21. ISSN 1996-5052 Liquid crystals - Analysis Dimers - Analysis Dimers - Properties 10.3923/crc.2010.57.63 English |
| spellingShingle | Liquid crystals - Analysis Dimers - Analysis Dimers - Properties Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Lutfor, Md Rahman Ahmad, Mansor Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title | Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title_full | Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title_fullStr | Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title_full_unstemmed | Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title_short | Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| title_sort | synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety |
| topic | Liquid crystals - Analysis Dimers - Analysis Dimers - Properties |
| url | http://psasir.upm.edu.my/id/eprint/16936/ http://psasir.upm.edu.my/id/eprint/16936/ |