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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| Format: | Article |
| Language: | English |
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Asian Network for Scientific Information
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/13472/ http://psasir.upm.edu.my/id/eprint/13472/1/13472.pdf |
| _version_ | 1848842121921953792 |
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| author | Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor |
| author_facet | Salisu, Abdulsalam Abubakar Ab. Rahman, Mohamad Zaki Silong, Sidik Rahman, Lutfor Ahmad @ Ayob, Mansor |
| author_sort | Salisu, Abdulsalam Abubakar |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T07:54:06Z |
| format | Article |
| id | upm-13472 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:54:06Z |
| publishDate | 2009 |
| publisher | Asian Network for Scientific Information |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-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 |
| spellingShingle | 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/13472/ http://psasir.upm.edu.my/id/eprint/13472/ http://psasir.upm.edu.my/id/eprint/13472/ http://psasir.upm.edu.my/id/eprint/13472/1/13472.pdf |