112095-71-3Relevant academic research and scientific papers
Synthesis, characterization and theoretical study of a new liquid crystal compound with an oxazepine core
Mohammad, Abdulkarim-Talaq,Yeap, Guan-Yeow,Osman, Hasnah
, p. 88 - 96 (2015/03/04)
A novel synthesis of heterocyclic liquid crystal compounds containing a seven-membered 1,3-oxazepine with terminal alkyloxy chains has been carried out. The molecular structures of these compounds were substantiated by FT-IR NMR elemental analysis. The relationship between the structures and the mesomorphic behaviours of their derivatives were investigated. The results showed that the formation of mesophases is strongly dependent on the type of core moiety. All compounds with oxazepinediones and oxazepanediones are non-mesogenic and only exhibit Cr1Cr2 upon cooling and heating. However, the SmA and N phases were observed in the 5,6-benzo [1,3] oxazepine-4,7-diones series of compounds. The study also revealed that the length of the alkyl chain has a significant effect on the liquid crystalline properties; the nematic phase can only observed in long-chain derivatives of 5,6-benzo [1,3] oxazepine-4,7-diones. Theoretical studies are in agreement with our result.
Monomeric and dimeric ortho-metallated palladium( II) -imine systems as liquid crystals
Buey, Julio,Espinet, Pablo
, p. 137 - 145 (2007/10/03)
Several types of ortho-palladated complexes derived from the imines HLn = p-CnH2n - 1 O-C6H4-CH=N-C6H4-OCnH2n + 1-p (n = 2, 4, 6, 8 and 10) have been prepared and their mesogenic properties studied. The types include the dinuclear complexes [Pd(μ-X)Ln]2 with X = Cl, OAc, (R)-2-Cl-propionato or (S)-2-Br-propionato, and the mononuclear complexes [Pd(acac)Ln] and [Pd(NHacac)Ln] (NHacac = 4-amino-3-penten-2-onate). Most of the complexes (except the acetato derivatives and some others with very short alkoxy chains) show liquid-crystal behavior. Nematic, smectic A and smectic C phases are found. Most of the derivatives with chiral carboxylates display double melting behavior.
