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Liquid Crystal Intermediates

IP.com Disclosure Number: IPCOM000062627D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Ueki, T: AUTHOR

Abstract

Disclosed are liquid crystal intermediates whose derivatives have liquid crystal phase (e.g., nematic phase or chiral smectic C phase ) in a wide temperature range including room temperature, fast response to applied voltage, and chemically and optically stable nature. They are 4-(5-n-alkyl-1, 3-dioxane) benzoic acid and 4-(3-n-alkyl-1, 2- pyridazine) benzoic acid with chemical structures, as shown in Figs. 1 and 2, respectively. In Figs. 1 and 2, R is an alkyl-group and n may be in the range of 1 - 18. By substituting an alkoxy-group for an alkyl-group, it is possible to increase the dipole moment in the vertical direction of the long axis of molecules, they are useful intermediates of smectic liquid crystals.

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Liquid Crystal Intermediates

Disclosed are liquid crystal intermediates whose derivatives have liquid crystal phase (e.g., nematic phase or chiral smectic C phase ) in a wide temperature range including room temperature, fast response to applied voltage, and chemically and optically stable nature. They are 4-(5-n-alkyl-1, 3-dioxane) benzoic acid and 4-(3-n-alkyl-1, 2- pyridazine) benzoic acid with chemical structures, as shown in Figs. 1 and 2, respectively. In Figs. 1 and 2, R is an alkyl- group and n may be in the range of 1 - 18. By substituting an alkoxy-group for an alkyl-group, it is possible to increase the dipole moment in the vertical direction of the long axis of molecules, they are useful intermediates of smectic liquid crystals. The phenyl-dioxane compounds or the phenyl-pyridazine compounds, which have a hydroxyl-group (-OH) instead of a carboxyl-group with chemical structures, shown in Figs. 3 and 4, respectively, are also useful intermediates. In Figs. 3 and 4, R is an alkyl-group and n may be in the range of 1 - 18. The phenyl-dioxane liquid crystals have also advantages of small viewing angle dependence and excellent (gamma)-characteristics. The phenyl-pyridazine liquid crystals have fast response because of their low viscosity and since their intermolecular force in the side direction of the molecules is stronger than that in the opposite direction; they are especially useful smectic liquid crystals.

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