- Synthesis method of liquid crystal intermediate
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The invention discloses a synthetic method of a liquid crystal intermediate, which comprises the following operations: preparing compound B1, hydrolyzing compound B1 to prepare compound B2. The compounds B2 and 3, 4 - dihydro - 2H - pyran were reacted wit
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- ULTRAVIOLET LIGHT ABSORBERS
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The present invention relates to compounds that have ultraviolet light absorbing properties, and which can also have mesogenic properties. The present invention also relates to compositions that include one or more such compounds, and to articles of manufacture that include one or more such compounds, such as optical elements that include an optical substrate and a layer that includes at least one compound of the present invention.
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- Pendant triazole ring assisted mesogen containing side chain liquid crystalline polymethacrylates: Synthesis and characterization
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Two series of click chemistry assisted alkoxymethyl-1H-[1,2,3]-triazol-1-yl containing sidechain liquid-crystalline polymethacrylates were synthesized by free radical polymerization technique. Mesogen was linked to backbone through various spacer units. Monomers and polymers were characterized by FT-IR, 1H and 13C-NMR spectral techniques. Thermal stability of polymers was confirmed by thermogravimetric analysis. Mesomorphic property and phase transition temperature of polymers were analysed by differential scanning calorimetry and polarized optical microscopy. Phase transition temperature and mesomorphic property of polymers with respect to insertion of polar alkoxy group on terminal triazole ring and spacer length between backbone and mesogen were investigated. Polymers exhibited grainy like textures under polarized optical microscopy. Spacer length between mesogen and backbone alters phase transition temperature of the polymers. Indian Academy of Sciences.
- Palani,Saravanan,Kannan
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scheme or table
p. 81 - 89
(2012/02/01)
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- Hydrogen-bond induced side-chain liquid crystalline polymers based on nicotinic acid derivatives
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Supramolecular side-chain liquid crystalline poly(acrylate)s have been prepared by self-assembly of H-bond donor and acceptor complexes through intermolecular complementary hydrogen bond formation. Poly[4-(m-acryloyloxyalkyloxy)benzoic acid]s [m = 6 (P1) and 8 (P2)] were employed as polymer components. Liquid crystalline nicotinic acid derivatives (C1, C2, C3, and C4) were used as complementary H-bond donor/acceptor counterparts. The liquid crystalline properties of the nicotinic acid derivatives, the polymers and their complexes were investigated by DSC and POM. Methylene spacers present at the terminal position of the nicotinic acid derivatives played a key role in mesophase arrangements. The columnar phase exhibited by the nicotinic acid derivatives completely disappeared in the H-bonded complexes to afford a nematic phase, thereby substantiating the complex formation.
- Saravanan,Ambili,Kannan
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scheme or table
p. 217 - 222
(2011/10/18)
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- Synthesis and Characterization of a Series of Liquid Crystal Monomers Containing a Novel Spacer Group Based on Vinylacetic Acid
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A series of liquid crystal monomers with side chains involving a vinylacetic acid unit have been prepared, and their thermal and optical properties compared with those of related compounds containing the same mesogenic unit but a conventional polymethylene spacer group based on a terminal alkene.
- Jacobs, Howard A.,Day, Gary M.,Jackson, W. Roy,Simon, George P.,Watson, Keith G.,Zheng, S.
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p. 695 - 702
(2007/10/02)
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