Effects of Lateral Substituents on Mesomorphic Behavior. I. 4-(Benzylideneamino) phenyl 4-Alkoxybenzoates

The nematic-isotropic transition temperature of 3-pyridyl 4-(4-propoxybenzylideneamino) benzoate is higher by 13°C than that of the phenyl analogue and the smectic A-nematiclisotropic transition is also promoted by the replacement of the terminal moiety as much as 23°C. The enhancement of both the nematic and smectic thermal stabilities decreases as the terminal alkyl chain length increases.Similar changes in the mesomorphic properties by the replacement are recorded for N-[4-(4-alkoxybenzoyloxy) benzylidene] anilines and other isomeric compounds.

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Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

Matsunaga

Akagawa

Satou

et al. 2000

Molecular Crystals and Liquid Crystals Science and Technology.

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Effects of Lateral Substituents on Mesomorphic Behavior. II. 4-(4-Alkoxybenzylideneamino)phenyl Benzoates

Matsunaga

Mukougawa

Saito

1998

Molecular Crystals and Liquid Crystals Science and Technology.

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Effects of Lateral Substituents on Mesomorphic Behavior. III. N-4-(4-Alkoxybenzoyloxy)benzylidene]-anilines

Matsunaga

Miyake

Rikimaru

et al. 1999

Molecular Crystals and Liquid Crystals Science and Technology.

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The mesomorphic properties of N-[4-(4-alkoxybenzoyloxy)benzylidene]-2-and -3-X-aniline$, where X = Me,F,CI,Br or I, were examined. The 2-Me derivatives give higher nematicisotropic transition temperatures than the 3-Me derivatives, whereas the reverse is true for the F compounds. The intersection between the plots of the transition temperatures of the 2-X and 3-X derivatives against the alkyl chain length is found for the CI, Br, and I compounds, respectively. The smectic A-nematic transition temperature recorded for the heptyloxy member is promoted by the 3-X substitution as much as 32°C (X = F ) and 16" (X = Cl).

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Effects of Lateral Substituents on Mesomorphic Behavior. I. 4-(Benzylideneamino) phenyl 4-Alkoxybenzoates

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References 9 publications

Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

Effects of Lateral Substituents on Mesomorphic Behavior. II. 4-(4-Alkoxybenzylideneamino)phenyl Benzoates

Effects of Lateral Substituents on Mesomorphic Behavior. III. N-4-(4-Alkoxybenzoyloxy)benzylidene]-anilines

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