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Synthesis of New Liquid Crystalline Diglycidyl Ethers
School of Industrial Technology, University Sains Malaysia, Penang 11800, Malaysia
* Author to whom correspondence should be addressed.
Received: 3 November 2011; in revised form: 13 December 2011 / Accepted: 17 December 2011 / Published: 10 January 2012
Abstract: The phenolic Schiff bases I–VI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl ethers Ia–VIa. The structures of these compounds were confirmed by CHN, FT-IR, 1H-NMR, and 13C-NMR spectroscopy. Their thermotropic liquid crystalline behavior was studied using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). All the diglycidyl ethers prepared exhibit nematic mesophases, except for Va and VIa, which did not show any transition mesophases, but simply flow to liquids.
Keywords: synthesis; diglycidyl ether; schiff base; liquid crystal
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MDPI and ACS Style
Mohammed, I.A.; Hamidi, R.M. Synthesis of New Liquid Crystalline Diglycidyl Ethers. Molecules 2012, 17, 645-656.
Mohammed IA, Hamidi RM. Synthesis of New Liquid Crystalline Diglycidyl Ethers. Molecules. 2012; 17(1):645-656.
Mohammed, Issam Ahmed; Hamidi, Rashidah Mohamed. 2012. "Synthesis of New Liquid Crystalline Diglycidyl Ethers." Molecules 17, no. 1: 645-656.