Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone
New series of calamitic liquid crystal materials with rod-shape azobenzene moieties as a core has been synthesized and characterized by spectroscopic methods. The mesomorphic properties were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. The r...
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Asian Network for Scientific Information
2009
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Online Access: | http://psasir.upm.edu.my/id/eprint/13472/1/13472.pdf http://psasir.upm.edu.my/id/eprint/13472/ http://scialert.net/abstract/?doi=ajmskr.2009.22.28 |
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my.upm.eprints.134722018-10-11T06:50:50Z http://psasir.upm.edu.my/id/eprint/13472/ Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor New series of calamitic liquid crystal materials with rod-shape azobenzene moieties as a core has been synthesized and characterized by spectroscopic methods. The mesomorphic properties were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. The rod-shaped molecule 1-methoxyalkyloxy-4`-(4-phenylazo)acetophenone was prepared by diazotization of 4-Aminoacetophenone, coupling with phenol and subsequent etherification of 1-bromoalkyloxy-4`-(4-phenylazo)acetophenone in methanol. The presence of smectic A mesophases was confirmed by the textures and X-ray diffraction studies. Compounds 4a-4d (C3-C6) exhibits enantiotropic smectic A phase while, compound 4d (C8) show monotropic smectic A phase. Asian Network for Scientific Information 2009 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/13472/1/13472.pdf Salisu, Abdulsalam Abubakar and Ab. Rahman, Mohamad Zaki and Silong, Sidik and Rahman, Lutfor and Ahmad @ Ayob, Mansor (2009) Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone. Asian Journal of Materials Science, 1 (1). pp. 22-28. ISSN 1996-3394 http://scialert.net/abstract/?doi=ajmskr.2009.22.28 10.3923/ajmskr.2009.22.28 |
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New series of calamitic liquid crystal materials with rod-shape azobenzene moieties as a core has been synthesized and characterized by spectroscopic methods. The mesomorphic properties were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. The rod-shaped molecule 1-methoxyalkyloxy-4`-(4-phenylazo)acetophenone was prepared by diazotization of 4-Aminoacetophenone, coupling with phenol and subsequent etherification of 1-bromoalkyloxy-4`-(4-phenylazo)acetophenone in methanol. The presence of smectic A mesophases was confirmed by the textures and X-ray diffraction studies. Compounds 4a-4d (C3-C6) exhibits enantiotropic smectic A phase while, compound 4d (C8) show monotropic smectic A phase. |
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Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor |
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Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
author_facet |
Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor |
author_sort |
Salisu, Abdulsalam Abubakar |
title |
Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
title_short |
Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
title_full |
Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
title_fullStr |
Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
title_full_unstemmed |
Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
title_sort |
calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone |
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Asian Network for Scientific Information |
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2009 |
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http://psasir.upm.edu.my/id/eprint/13472/1/13472.pdf http://psasir.upm.edu.my/id/eprint/13472/ http://scialert.net/abstract/?doi=ajmskr.2009.22.28 |
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