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http://hdl.handle.net/2289/3634
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DC Field | Value | Language |
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dc.contributor.author | Reddy, Amaranatha R. | - |
dc.contributor.author | Sadashiva, B.K. | - |
dc.contributor.author | Raghunathan, V.A. | - |
dc.date.accessioned | 2008-08-07T05:54:17Z | - |
dc.date.available | 2008-08-07T05:54:17Z | - |
dc.date.issued | 2004-09 | - |
dc.identifier.citation | Chemistry of Materials, 2004, Vol.16, p4050 | en |
dc.identifier.issn | E-ISSN: 1520-5002 | - |
dc.identifier.issn | P-ISSN: 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/2289/3634 | - |
dc.description | Restricted Access. | en |
dc.description.abstract | The synthesis and mesomorphic properties of a number of compounds belonging to different homologous series and derived from 2,7-dihydroxynaphthalene are described. In addition, several compounds derived from 1,3-dihydroxybenzene have also been synthesized for comparison. All these compounds are relatively stable esters of E-p-n-alkoxycinnamic acids and E-p-n-alkoxy--methylcinnamic acids which are incorporated in the arms of these bent-core compounds. Many of these compounds show interesting mesophases including a novel antiferroelectric columnar phase with a rectangular lattice. Direct transitions from a rectangular columnar B1 phase, an antiferroelectric B2 phase, and an intercalated B6 phase to a nematic phase have also been obtained. In addition, a direct transition from a novel columnar phase with an oblique lattice to a nematic phase has also been observed for the first time. The X-ray diffraction pattern of an oriented sample of the mesophase with an oblique lattice exhibited by a bent-core material has been reported for the first time. The possibility of a mesophase with a pseudo hexagonal lattice has also been demonstrated in bent-core compounds. The nematic phase has been obtained exclusively in compounds derived from 2,7-dihydroxynaphthalene. The influence of the central core as well as that of a fluorine substituent on the phenyl rings in the sidearms of these bent-core compounds has also been examined. The mesophases have been characterized using conventional techniques. | en |
dc.format.extent | 1238324 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | American Chemical Society | en |
dc.relation.uri | http://dx.doi.org/10.1021/cm0494498 | en |
dc.rights | 2004 The American Chemical Society | en |
dc.title | Banana-shaped mesogens derived from 2,7-dihydroxynaphthalene and 1,3-dihydroxybenzene: novel columnar mesophases | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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2004 Chem Mater V16 p4050-4062.pdf Restricted Access | Restricted Access | 1.21 MB | Adobe PDF | View/Open Request a copy |
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